Migration Configuration

This chapter contains the following sections:

Configuring the BGP Route Reflector on a Spine

You can add the Cisco Dynamic Fabric Automation (DFA)-specific Border Gateway Protocol (BGP) configuration on the spine and identify the BGP route reflector.

Note the following requirements on spine switches:
  • If you use a Cisco Nexus 6000 or 7000 Series switch as a spine switch, do the following. FabricPath non-tranit mode is supported on Cisco Nexus 7000 Series Switches.
    • For a transit mode switch, you must enter the fabricpath mode transit command.

      Note
      For the fabricpath mode transit command to take effect, the system must be reloaded.

Note
Spines in the Cisco DFA fabric might or might not be BGP route-reflector nodes. If you must configure the spine switch as a BGP route-reflector, use the configuration in the following procedure.
Before You Begin

You must upgrade the spine switch software.

     Command or ActionPurpose
    Step 1switch #configure terminal   Enters global configuration mode.  
    Step 2switch (config) # feature bgp   Enables the Border Gateway Protocol (BGP). You must enable the BGP feature before you can configure BGP.  
    Step 3switch (config) # router bgp bgp-as   Configures a BGP process for an interface. The as-number is the number of an autonomous system that identifies the router to other BGP routers and tags that the routing information passed along. The AS number can be a 16-bit integer or a 32-bit integer in the form of a higher 16-bit decimal number and a lower 16-bit decimal number in xx.xx format.  
    Step 4switch (config-router) # address-family ipv4 unicast   Enters address family mode and configures submode commands for the BGP.  
    Step 5switch (config-router) # maximum-paths ibgp [maximum parallel paths]   Controls the maximum number of parallel routes that the BGP can support.  
    Step 6switch (config-router-af) # additional-paths send   Sends additional paths to and from the BGP peers.  
    Step 7switch (config-router-af) # additional-paths selection route-map All-paths   Specifies the route map for the additional paths selection.  
    Step 8switch (config-router) # address-family ipv6 unicast   Enter address family mode and configures submode commands for the BGP.  
    Step 9switch (config-router) # maximum-paths [ibgp]   Controls the maximum number of parallel routes that the BGP can support.  
    Step 10switch (config-router-af) # additional-paths send   Sends additional paths to and from the BGP peers.  
    Step 11switch (config-router-af) # additional-paths selection route-map   Specifies the route map for the additional paths selection.  
    Step 12switch (config-router) # address-family vpnv4 unicast   Enters address family mode and configures submode commands for the BGP.  
    Step 13switch (config-router-af) # additional-paths send   Sends additional paths to and from the BGP peers.  
    Step 14switch (config-router-af) # additional-paths receive   Receives additional paths to and from the BGP peers.  
    Step 15switch (config-router-af) # additional-paths selection route-map   Specifies the route map for the additional paths selection.  
    Step 16switch (config-router) # address-family vpnv6 unicast   Enters address family mode and configures submode commands for the BGP.  
    Step 17switch (config-router-af) # additional-paths send   Sends additional paths to and from the BGP peers.  
    Step 18switch (config-router-af) # additional-paths receive   Receives additional paths to and from the BGP peers  
    Step 19switch (config-router-af) # additional-paths selection route-map   Specifies the route map for the additional paths selection.  
    Step 20switch (config-router) # neighbor {bgp-client-subnet/mask} [remote-as {as-num [,as-num]}   Configures a BGP neighbor (router, vrf) and enters neighbor configuration mode.  
    Step 21switch (config-router-neighbor) # address-family ipv4 unicast   Enters address family mode or a virtual routing and forwarding (VRF) address-family mode to configure submode commands for the BGP.  
    Step 22switch (config-router-neighbor-af) # send-community  

    Sends a BGP community attribute to a peer.

     
    Step 23switch (config-router-neighbor-af) # send-community [extended]  

    Sends extended BGP community attribute to a peer.

     
    Step 24switch (config-router-neighbor-af) #route-reflector-client   Configures the router as a BGP route reflector and configures the specified neighbor as its client.  
    Step 25switch (config-router-neighbor) # address-family ipv6 unicast  

    Enters address family mode configure submode commands for the BGP.

     
    Step 26switch (config-router-neighbor-af) # send-community [extended]  

    Sends a BGP community attribute to a peer.

     
    Step 27switch (config-router-neighbor-af) #route-reflector-client   Configures the router as a BGP route reflector and configures the specified neighbor as its client.  
    Step 28switch (config-router-neighbor) # address-family vpnv4 unicast  

    Enters address family mode configure submode commands for the BGP.

     
    Step 29switch (config-router-neighbor-af) # send-community [extended]  

    Sends a BGP community attribute to a peer.

     
    Step 30switch (config-router-neighbor-af) # route-reflector-client   Configures the router as a BGP route reflector and configures the specified neighbor as its client.  
    Step 31switch (config-router-neighbor-af) # capability additional-paths receive   Configures BGP to advertise the capability of sending and receiving additional paths to and from the BGP peers.  
    Step 32switch (config-router-neighbor) #address-family-vpnv6 unicast   Enters address family mode configure submode commands for the BGP.  
    Step 33switch (config-router-neighbor-af) # send-community [extended]  

    Sends a BGP community attribute to a peer.

     
    Step 34switch (config-router-neighbor-af) # route-reflector-client   Configures the router as a BGP route reflector and configures the specified neighbor as its client.  

    This example shows how to configure the BGP route reflector on the spine switch. 

    switch # configure terminal
switch (config) # feature bgp
switch (config) # router bgp 100
switch (config-router) # router-id 1.1.1.4
switch (config-router) # address-family ipv4 unicast
switch (config-router-af) # redistribute hmm route-map AM <---AM is the route-map name that permits all IPv4 routes excluding VLAN-x backbone prefix
switch (config-router-af) # maximum-paths ibgp 2
switch (config-router-af) # additional-paths send
switch (config-router-af) # additional-paths selection route-map ALL-PATHS
switch (config-router) # address-family ipv6 unicast
switch (config-router-af) # redistribute hmm route-map host-v6 <---host-v6 is the route-map name that
permits all IPv6 routes 
switch (config-router-af) # maximum-paths ibgp 2
switch (config-router-af) # additional-paths send
switch (config-router-af) # additional-paths selection route-map ALL-PATHS
switch (config-router) # address-family vpnv4 unicast
switch (config-router-af) # additional-paths send		
switch (config-router-af) # additional-paths receive
switch (config-router-af) # additional-paths selection route-map ALL-PATHS
switch (config-router) # address-family vpnv6 unicast
switch (config-router-af) # additional-paths send
switch (config-router-af) # additional-paths receive
switch (config-router-af) # additional-paths selection route-map ALL-PATHS
switch (config-router) # neighbor 1.1.1.0/24 remote-as 100 <---Route-Reflector Spine IP=1.1.1.1
switch (config-router-neighbor) # address-family ipv4 unicast
switch (config-router-neighbor-af) # send-community
switch (config-router-neighbor-af) # send-community extended
switch (config-router-neighbor-af) # route-reflector-client
switch (config-router-neighbor) # address-family ipv6 unicast
switch (config-router-neighbor-af) # send-community extended
switch (config-router-neighbor-af) # route-reflector-client
switch (config-router-neighbor) # address-family vpnv4 unicast
switch (config-router-neighbor-af) # send-community extended
switch (config-router-neighbor-af) # route-reflector-client
switch (config-router-neighbor) # address-family vpnv6 unicast
switch (config-router-neighbor-af) # send-community extended
switch (config-router-neighbor-af) # route-reflector-client

    Updating SVI Configuration on Border Leaf Nodes

    You can enable anycast forwarding mode on switched virtual interfaces (SVIs) without a VN-segment on border leaf devices and nondefault VRF VLANs and you can enable the Hot Standby Routing Protocol (HSRP) virtual IP addresses on the border leaf.

    Before You Begin

    You must upgrade the border leaf software.

       Command or ActionPurpose
      Step 1switch # configure terminal  

      Enters global configuration mode.

       
      Step 2switch (config) # feature hsrp  

      Enters HSRP configuration mode and enables HSRP.

       
      Step 3switch (config) # interface vlan vlan-id  

      Creates a VLAN interface and enters interface configuration mode. The vlan-id range is from 1 to 4094.

       
      Step 4switch (config-if) # no shutdown  

      Disables the shutdown function on an instance of the BGP.

       
      Step 5switch (config-if) # no ip redirects  

      Disables IP redirects.

       
      Step 6switch (config-if) # ip address ip-address-mask  

      Specifies a primary IP address for an interface.

       
      Step 7switch (config-if) # ipv6 address {addr | [eui64] [route-preference preference ] [secondary] [tag tag-id] | use-link-local-only }  

      Configures an IPv6 address on an interface. The addr format is A:B::C:D/length. The length range is 1 to 128.

      The eui64 command configures the Extended Unique Identifier (EUI64) for the low-order 64 bits of the address.

      The route-preference command sets the route preference for local or direct routes. Thepreference range is from 0 to 255.

      The secondary command creates a secondary IPv6 address.

      The tagtag command configures a route tag value for local or direct routes.

      The use-link-local-only command specifies IPv6 on the interface using only a single link-local.

       
      Step 8switch (config-if) # ip router ospf area instance-tag area area-id [secondaries none]  

      Specifies the Open Shortest Path First (OSPF) instance and area for an interface. The instance-tag is locally assigned and can be any word or positive integer; can be a maximum of 20 alphanumeric characters.

       
      Step 9switch (config-if) # fabric forwarding anycast-gateway-mac mac-address  

      Specifics the MAC address of the server-facing ports across all leaf nodes. The anycast gateway MAC address is used per interface; it is replicated across all the switch virtual interfaces (SVI) that are supporting proxy gateway or anycast gateway mode.

       
      Step 10switch (config-if) # hrsp version 2  

      Configures the Hot Standby Redundancy Protocol (HSRP) version 2.

       
      Step 11switch (config-if-hsrp) # hsrp group-number [ip4 | ipv6]  

      Enters HSRP configuration mode and creates the number of HSRP groups that can be configured on a Gigabit Ethernet port, including the main interfaces and subinterfaces. The group-number range is from 1 to 255. The default value is 0.

       
      Step 12switch (config-if-hsrp) # preempt [delay {minimum min-delay | reload rel-delay | sync | sync-delay}]  
      Configures a preemption delay.

      • If you opt to specify a delay minimum, this specifies the minimum number of seconds that preemption is delayed to allow routing tables to be updated before a router becomes active.

      • If you opt to specify a delay reload , this specifies the time delay after the router has reloaded. This period applies only to the first interface-up event after the router had reloaded. The default value is 0.

      • If you opt to specify a delay sync, this specifies the maximum number of seconds to allow IP redundancy clients to prevent preemption. When this period expires, preemption occurs regardless of the state of the IP redundancy clients. The default value is 0.

       
      Step 13switch (config-if-hsrp) # priority level [forwarding-threshold lower lower-value upper upper-value]   Sets the priority level within an HSRP group. The level range of values is from 1 to 255. If this router is the owner of the IP addresses, then the value is automatically set to 255. The default is 100.

      • If you specify a forwarding-threshold, you set the threshold used by a vPC to determine when to fail over to the vPC trunk. The lower-value range is from 1 to 255. The default is 1. The upper-value range is from 1 to 255. The default is 255.

       
      Step 14switch (config-if-hsrp) # ip [autoconfig | ip-address [secondary]]  

      Assigns a virtual address to an HSRP group.

       
      Step 15switch (config-if-) # hsrp group-number [ip4 | ipv6]  

      Enters HSRP configuration mode and creates the number of HSRP groups that can be configured on a Gigabit Ethernet port, including the main interfaces and subinterfaces. The group-number range is from 1 to 255. The default value is 0.

       
      Step 16switch (config-if-hsrp) # mac-address mac-address  

      Configures a static MAC address for a Layer 3 interface.

       
      Step 17switch (config-if-hsrp) # preempt [delay {minimum min-delay | reload rel-delay | sync | sync-delay}]  
      Configures a preemption delay.

      • If you opt to specify a delay minimum, this specifies the minimum number of seconds that preemption is delayed to allow routing tables to be updated before a router becomes active.

      • If you opt to specify a delay reload , this specifies the time delay after the router has reloaded. This period applies only to the first interface-up event after the router had reloaded. The default value is 0.

      • If you opt to specify a delay sync, this specifies the maximum number of seconds to allow IP redundancy clients to prevent preemption. When this period expires, preemption occurs regardless of the state of the IP redundancy clients. The default value is 0.

       
      Step 18switch (config-if-hsrp) # priority level [forwarding-threshold lower lower-value upper upper-value]   Sets the priority level within an HSRP group. The level range of values is from 1 to 255. If this router is the owner of the IP addresses, then the value is automatically set to 255. The default is 100.

      • If you specify a forwarding-threshold, you set the threshold used by a vPC to determine when to fail over to the vPC trunk. The lower-value range is from 1 to 255. The default is 1. The upper-value range is from 1 to 255. The default is 255.

       
      Step 19switch (config-if-hsrp) # ip [autoconfig | ip-address [secondary]]  

      Assigns a virtual address to an HSRP group. If you use the autoconfig command, it generates a link-local address from the link-local prefix and a modified EUI-64 format Interface Identifier, where the EUI-64 Interface Identifier is created from the relevant HSRP virtual MAC address. The ip-address is the Virtual IP address for the virtual router (HSRP group). The IP address must be in the same subnet as the interface IP address. You must configure the virtual IP address for at least one of the routers in the HSRP group. Other routers in the group will pick up this address. The IP address can be an IPv4 address. The secondary command indicates that the IP4 address is a secondary HSRP virtual address.

       
      Step 20switch (config-if) # hsrp group-number [ip4 | ipv6]  

      Enters HSRP configuration mode and creates the number of HSRP groups that can be configured on a Gigabit Ethernet port, including the main interfaces and subinterfaces. The group-number range is from 1 to 255. The default value is 0.

       
      Step 21switch (config-if-hsrp) # mac-address mac-address  

      Configures a static MAC address for a Layer 3 interface.

       
      Step 22switch (config-if-hsrp) # preempt [delay {minimum min-delay | reload rel-delay | sync|sync-delay}]  
      Configures a preemption delay.

      • If you opt to specify a delay minimum, this specifies the minimum number of seconds that preemption is delayed to allow routing tables to be updated before a router becomes active.

      • If you opt to specify a delay reload , this specifies the time delay after the router has reloaded. This period applies only to the first interface-up event after the router had reloaded. The default value is 0.

      • If you opt to specify a delay sync, this specifies the maximum number of seconds to allow IP redundancy clients to prevent preemption. When this period expires, preemption occurs regardless of the state of the IP redundancy clients. The default value is 0.

       
      Step 23switch (config-if-hsrp) # priority level [forwarding-threshold lower lower-value upper upper-value]   Sets the priority level within an HSRP group. The level range of values is from 1 to 255. If this router is the owner of the IP addresses, then the value is automatically set to 255. The default is 100.

      • If you specify a forwarding-threshold, you set the threshold used by a vPC to determine when to fail over to the vPC trunk. The lower-value range is from 1 to 255. The default is 1. The upper-value range is from 1 to 255. The default is 255.

       
      Step 24switch (config-if-hsrp) # ip [autoconfig | ip-address [secondary]]  

      Assigns a virtual address to an HSRP group. If you use the autoconfig command, it generates a link-local address from the link-local prefix and a modified EUI-64 format Interface Identifier, where the EUI-64 Interface Identifier is created from the relevant HSRP virtual MAC address. The ip-address is the Virtual IP address for the virtual router (HSRP group). The IP address must be in the same subnet as the interface IP address. You must configure the virtual IP address for at least one of the routers in the HSRP group. Other routers in the group will pick up this address. The IP address can be an IPv4 address. The secondary command indicates that the IP4 address is a secondary HSRP virtual address.

       

      This example shows how to configure the SVI interfaces for default/nondefault VRF instances, as well as associated HSRP and dummy HSRP groups with anycast gateway MAC addresses. 

      switch (config) # feature hsrp
switch (config) # interface vlan20
switch (config-if) #	no shutdown
switch (config-if) # 	no ip redirects
switch (config-if) #	ip address 20.1.1.104/24
switch (config-if) #	ipv6 address 20:1::104/64
switch (config-if) #	ip router ospf 1 area 0.0.0.
switch (config-if) #	fabric forwarding mode anycast gateway <---must be added to configure vlan-20 in Cisco DFA mode
switch (config-if) #	hsrp version 2
switch (config-if) #	hrsp 20 ip4
switch (config-if-hsrp) # preempt
switch (config-if-hsrp) # priority 110
switch (config-if-hsrp) # ip 20.1.1.100
switch (config-if) # hsrp 20 ipv6
switch (config-if-hsrp) # preempt
switch (config-if-hsrp) # priority 110
switch (config-if-hsrp) # ip 20:1::100
switch (config-if) # hsrp 50 ipv4 <---dummy HSRP group (ipv4 or ipv6)
switch (config-if-hsrp) # mac-address DEAD.0000.DEAF <---anycast gateway MAC
switch (config-if-hsrp) # preempt
switch (config-if-hsrp) # priority 110
switch (config-if-hsrp) # ip 20.1.1.200 <---functionally unused IP

      Configuring Border Leafs for DFA

      You can configure an upgraded border leaf.

      Before You Begin

      You must upgrade the border leaf software.

         Command or ActionPurpose
        Step 1switch # configure terminal  

        Enters global configuration mode.

         
        Step 2switch (config) # install feature-set fabricpath  

        Installs the FabricPath feature set on the switch.

         
        Step 3switch (config) # install feature-set fabric  

        Installs the fabric feature on the switch.

         
        Step 4switch (config) # feature-set fabricpath  

        Enables a FabricPath feature set.

         
        Step 5switch (config) # feature-set fabric  

        Enables the fabric feature on the switch.

         
        Step 6switch (config) # feature fabric forwarding  

        Enables fabric network services on a device and enables the Host Mobility Manager and release-specific HMM configuration commands..

         
        Step 7switch (config) # feature bgp  

        Enables the Border Gateway Protocol (BGP). You must enable the BGP feature before you can configure BGP.

         
        Step 8switch (config) # feature isis  

        Enables the intermediate-system-to-intermediate-system (ISIS) for FabricPath core.

         
        Step 9switch (config) # feature vn-segment-vlan-based  

        Enables the VLAN-based virtual network (VN) segment feature on a switch. You can use this feature only if the FabricPath feature set is enabled on the switch..

         
        Step 10switch (config) # system fabric dynamic-vlans vlan-range  

        This allocation is mandatory to include for tenant VRFs core VLAN range as well as the entire server facing VLANs range. The range has to be continuous. Control segment VLAN is not a part of this dynamic range.

         
        Step 11switch (config ) # system fabric core-vlans vlan-id -or-range  

        Defines a range of VLANs out of the dynamic range, to be used for tenant core SVI. The VLAN range is reserved to be in use for Tenant VRF core VLANs.

         
        Step 12switch (config) # fabric forwarding identifier id  

        Specifies a unique fabric ID. The id range is from 1 to 65535.

         
        Step 13switch (config) # fabric forwarding anycast-gateway-mac mac-address  

        Specifies the MAC address of the server-facing ports across all leaf nodes. The anycast gateway MAC address is used per interface, so it is replicated across all the switch virtual interfaces (SVIs) that are supporting proxy gateway or anycast gateway.

         
        Step 14switch (config) # fabric forwarding switch-role [border] {leaf | spine}  

        Defines the switch role. The Leaf adds tenant (vrf) functionality; the border leaf adds the ability to connect with routers.

         
        Step 15switch (config) # fabricpath domain default  

        Enters global FabricPath Layer 2 ISIS configuration mode.

         
        Step 16switch (config) # vlan fabric-control-vlan-id  

        Specifies the VLAN IDs of the allowed FabricPath VLANs in the anycast bundle. You can specify avland-id in a range from 1 to 4094.

         
        Step 17switch (config-vlan) # mode fabricpath  

        Enables the VLAN as a FabricPath VLAN and enters FabricPath mode.

         
        Step 18switch (config) # interface vlan vlan-id  

        Creates the corresponding Layer 3 VLAN interface and enters interface configuration mode. The vlan-id range is from 2 to 4094.

         
        Step 19switch (config-if) # no shutdown  

        Disables the shutdown function on an instance of the BGP.

         
        Step 20switch (config-if) # ip address ip-address-mask  

        Configures the IP address to be used as BGP endpoints.

         
        Step 21switch (config-if) # fabric forwarding control-segment  

        Specifies this interface to be the DFA control segment. Only one interface can be this type.

         
        Step 22switch (config) # route-map map-tag  

        Enters route map configuration mode and specifies a route map by identifying the route map name (map-tag). The Maximum size is 63 characters. This name should be the same as the name that you use to configure the BGP additional paths.

         
        Step 23switch (config-route-map) # set path-selection all advertise  

        Sets the path selection criteria for BGP.

         
        Step 24switch (config-s) # ip access-list access-list-name  

        Defines an IP4 access list access control list (ACL) in order to enable filtering for packets.

         
        Step 25switch (config-s-acl) # permit ip source destination   Creates an access control list (ACL) rule that permits traffic that matches its conditions. The source destination identifies the source network address and the destination network address.  
        Step 26switch (config) # ipv6 access-list access-list-name  

        Creates an IPv6 access control list (ACL) or enters IP access list configuration mode for a specific ACL.

         
        Step 27switch (config-acl) # sequence-number permit protocol  

        Configures a permit rule in an IPv6 ACL.

         
        Step 28switch (config) # route-map map-tag [deny | permit] [sequence-number]  

        Predefines a route map for redistribution of HMM host routes. The name should be the same as name that you used when you entered the BGP redistribute-hmm route map command. Use thepermit command to specify that the route or packet is not distributed if the match criteria are met for the route map. Use the permit command to specify that the route or packet is distributed if the match criteria for this route are met. The sequence-number indicates the position a new route map has in the list of map routes already configured with same name. The no form of this command deletes the position of the route map. The range is 0 to 65535.

         
        Step 29switch (config-route-map) # match interface {interface-type number [,interface-type number...]}  

        Matches an interface in a route map. Use the match interface command to provide a list of interfaces to match a route against. The route next-hop addresses that are reached by one of these interfaces result in a match for the route map.

         
        Step 30switch (config) # route-map map-tag [deny | permit] [sequence-number]  

        Specifies a route map by identifying the route map name (map-tag). The maximum size is 63 characters. Use thepermit command to specify that the route or packet is not distributed if the match criteria are met for the route map. Use the permit command to specify that the route or packet is distributed if the match criteria for this route are met. The sequence-number indicates the position a new route map has in the list of map routes already configured with same name. The no form of this command deletes the position of the route map. The range is 0 to 65535.

         
        Step 31switch (config-route-map) # match ip address {prefix-listprefix-list name [prefix-list name...]}  

        Distributes routes that have a destination IPv6 network number address that is permitted by a standard access list, an expanded list, or a prefix list. The prefix-list name can be any alphanumeric string up to 63 characters. The ellipsis indicates that multiple values can be entered, up to 32 prefix lists.

         
        Step 32switch (config-route-map) # match interface {interface-type number [,interface-type number...]}  

        Matches an interface in a route map. Use the match interface command to provide a list of interfaces to match a route against. The route next-hop addresses that are reached by one of these interfaces result in a match for the route map.

         
        Step 33switch (config-route-map) # match ip address prefix-list name [prefix-list name..] access-list-name  

        Distributes routes that have a destination IPv6 network number address that is permitted by a standard access list, an expanded list, or a prefix list. The prefix-list name can be any alphanumeric string up to 63 characters. The ellipsis indicates that multiple values can be entered, up to 32 prefix lists.

         
        Step 34Device (config) # router bgp as-number  

        Configures a BGP process for an interface. The as-number is the number of an autonomous system that identifies the router to other BGP routers and tags that the routing information passed along. The AS number can be a 16-bit integer or a 32-bit integer in the form of a higher 16-bit decimal number and a lower 16-bit decimal number in xx.xx format.

         
        Step 35Device (config-router) # address-family ipv4 unicast  

        Enters address family mode or a virtual routing and forwarding (VRF) address-family mode and configures submode commands for the BGP.

         
        Step 36Device (config-router-af) # redistribute hmm route-map map-name  

        Enables redistribution of IPv4 and IPv6 Host Mobility Manager (HMM) routes through specific route maps.

         
        Step 37switch (config-router-af) # maximum-paths [ibgp] number-paths  

        Controls the maximum number of parallel routes that the BGP can support.

         
        Step 38switch (config-router-af) # additional-paths receive  

        Receives additional paths to and from the BGP peers.

         
        Step 39switch (config-router) # address-family ipv6 unicast  

        Enters address family mode or a virtual routing and forwarding (VRF) address-family mode and configure submode commands for the BGP.

         
        Step 40switch (config-router-af) # redistribute hmm route-map map-name  

        Redistributes IPv4 and IPv6 Host Mobility Manager (HMM) routes through specific route maps.

         
        Step 41switch (config-router-af) # maximum-path [ibgp] number-paths  

        Controls the maximum number of parallel routes that the BGP can support.

         
        Step 42switch (config-router-af) # additional-paths-receive  

        Receives additional paths to and from the BGP peers.

         
        Step 43switch (config) # address-family vpnv4 unicast  

        Enters address family mode or a virtual routing and forwarding (VRF) address-family mode and configure submode commands for the BGP.

         
        Step 44switch (config-router-af) # additional-paths receive  

        Receives additional paths to and from the BGP peers.

         
        Step 45switch (config-router) # address-family vpnv6 unicast  

        Enters address family mode or a virtual routing and forwarding (VRF) address-family mode and configure submode commands for the BGP.

         
        Step 46switch (config-router-af) # additional-paths receive   Receives additional paths to and from the BGP peers.  
        Step 47switch (config-router) # neighbor {ip-addr |ip-prefixlentgth} [remote-as {as-num [,as-num] |route-map map name}   Configures a BGP neighbor (router, VRF) and enters neighbor configuration mode.  
        Step 48switch (config-router-neighbor) # address-family ipv4 unicast  

        Enters address family mode or a virtual routing and forwarding (VRF) address-family mode to configure submode commands for the BGP.

         
        Step 49switch (config-router-neighbor-af) # send community text  

        Sends a message to the active user session. The text string can be up to 80 alphanumeric characters and is case-sensitive.

         

        This example shows how to configure the core for a border leaf. 

        switch # configure terminal
switch (config)# install feature-set fabricpath
switch (config)# install feature-set fabric
switch (config)# feature-set fabricpath
switch (config)# feature fabric forwarding
switch (config)# feature bgp
switch (config)# feature isis
switch (config)# feature interface-vlan
switch (config)# feature vn-segment-vlan-based

switch (config)# system fabric dynamic-vlans 20-21, 201-202, 1001-1010
switch (config)# system fabric core-vlans 1001-1010
switch (config)# fabric forwarding identifier 100
switch (config)# fabric forwarding anycast-gateway-mac.DEAD.0000.DEAF
switch (config)# fabric forwarding switch-role border-leaf
switch (config)# fabricpath domain default

switch (config)# vlan 1001-1010
switch (config-vlan)# mode fabricpath

switch (config) # interface Vlan10
switch (config-if) # no shutdown
switch (config-if) # ip address 1.1.1.4/24
switch (config-if) # fabric forwarding control-segment

switch (config) # route-map ALL-PATHS permit 10 
switch (config-route-map) # set path-selection all advertise

switch (config-s)# ip access-list HOSTS
switch (config-s-acl)# 10 permit ip any any
switch (config-s)# ipv6 access-list hosts-v6
switch (config-s-acl)# 10 permit ipv6 any any

switch (config) # route-map AM deny 10
switch (config-route-map) # match interface Vlan10
switch (config) # route-map AM permit 20
switch (config-route-map) # match ip address HOSTS
switch (config) # route-map hosts-v6 permit 20
switch (config-route-map) # match ipv6 address hosts-v6

switch (config) # router bgp 100
switch (config-router) # address-family ipv4 unicast
switch (config-router-af) # redistribute hmm route-map AM
switch (config-router-af) # maximum-paths ibgp 2
switch (config-router-af) # additional-paths receive
switch (config-router-af) # additional-paths selection route-map ALL PATHS
switch (config-router) # address-family ipv6 unicast
switch (config-router-af) # redistribute hmm route-map hosts-v6
switch (config-router-af) # maximum-paths ibgp 2
switch (config-router-af) # additional-paths receive
switch (config-router-af) # addtional-path seelction route-map ALL PATHS
switch (config-router) # address-family vpnv4 unicast
switch (config-router-af) # additional-paths receive
switch (config-router) # address-family vpnv6 unicast
switch (config-router-af) # additional-paths receive
switch (config-router) # neighbor 1.1.1.1 remote-as 100
switch (config-router-neighbor) # address-family ipv4 unicast
switch (config-router-neighbor-af) # send-community both

        Adding a Host-Facing Tenant Interface (VLAN)

        You can add a host-facing tenant interface (VLAN) to allocate a new VLAN ID and an unused VNI and tie them together, create the corresponding Layer-3 interface and put it into the VRF, and configure the appropriate fabric forwarding mode.

           Command or ActionPurpose
          Step 1switch # configure terminal  

          Enters global configuration mode.

           
          Step 2switch (config) # vlan {vlan-id | vlan-range}  

          Specifies the VLAN IDs of the allowed FabrichPath VLANs in the anycast bundle. The vlan-id range is from 2 to 4094.

           
          Step 3switch (config-vlan) # mode fabricpath  

          Enables the VLAN as a FabricPath VLAN.

           
          Step 4switch (config-vlan) # vn-segment vni   Configures the virtual network (VN) segment id of the VLAN.  
          Step 5switch (config-profile-vrf) # interface vlanvlan-id  

          Specifies an interface type and number. The vlan-id range is from 2 to 4094.

           
          Step 6switch (config-if) # vrf member name  

          Creates a VPN routing and forwarding instance (VRF) or enters VRF configuration mode to configure submode commands for the Intermediate System-to-Intermediate System (IS-IS) Intradomain Routing Protocol.

           
          Step 7switch (config-if) # ip address ip-address-mask  

          Specifies a primary IP address for an interface.

           
          Step 8switch (config-if) # [ip pim sparse-mode]  

          Enables IPv4 Protocol Independent Multicast (PIM) sparse mode on an interface.

           
          Step 9switch (config-if) # fabric forwarding mode anycast-gateway  

          Enables the TF mode in DFA.

           
          Step 10switch (config-if) # no shutdown  

          Disables the shutdown function on a BGP instance.

           

          The following adds a host-facing tenant interface (VLAN). 

          switch # configure terminal
//Enter configuration commands, one per line. End with CNTL/Z.
switch (config)# vlan 20
switch (config-vlan)# mode fabricpath
switch (config-vlan)# vn-segment 20
switch (config-vlan)# interface vlan 20
switch (config-if) # vrf member VRF2
//Warning: Deleted all L3 config on interface Vlan20
switch (config-if) # ip address 1.1.1.4/24
switch (config-if) # [ip pim sparse-mode]
switch (config-if) # no shutdown
switch (config-if) # fabric forwarding mode anycast-gateway
switch (config-if) # exit

          Adding a Tenant (VRF) Instance on a Leaf

          To add a tenant instance, perform the following:

          • Configure a profile named vrf-tenant-profile

          • Allocate a VLAN

          • Create a VRF instance

          • Configure the route distinguisher and route targets

          • Tie the VNI/segment ID to the VRF instance

          • Create a Layer-3 VLAN and configure it with the same IP address/mask as the fabric control VLAN interface to map the BGP endpoint and the VRF BD VLAN

             Command or ActionPurpose
            Step 1switch # configure terminal  

            Enters global configuration mode.

             
            Step 2 switch # configure profile vrf-tenant-profile  

            Configures a profile and enters configuration profile mode to configure profile parameters.

             
            Step 3switch (config-profile) # apply profile vrf-tenant-profile  

            Applies the VRF tenant profile configuration profile to configure hosts.

             
            Step 4switch (config-profile) # vlan {vlan-id | vlan-range}  

            Specifies the VLAN IDs of the allowed FabricPath VLANs in the anycast bundle. The vlan-id range is from 1 to 4094.

             
            Step 5switch (config-profile-vlan) # mode fabricpath  

            Enables the VLAN as a FabricPath VLAN.

             
            Step 6switch (config-profile-vlan) # vn-segment segment-id   Configures the virtual network (VN) segment ID of the VLAN. The segment-id range is from 4096 to 16773119.  
            Step 7switch (config-profile) # vrf context name  

            Creates a virtual routing and forwarding (VRF) instances and enters VRF configuration mode. The name of the VRF can be any case-sensitive, alphanumeric string up to 32 characters.

             
            Step 8switch (config-profile-vrf) # rd route-distinguisher  

            Creates routing and forwarding tables.

             
            Step 9switch (config-profile-vrf) # address-family-ipv4 unicast  

            Enters address family mode or a virtual routing and forwarding (VRF) address-family mode and configures submode commands for the BGP.

             
            Step 10switch (config-profile-vrf-af) # route-target import route-target-ext-community  

            Imports routing information from the target virtual private network (VPN) extended community.

             
            Step 11switch (config-profile-vrf-af) # route-target export route-target-ext-community  

            Exports routing information from the target virtual private network (VPN) extended community.

             
            Step 12switch (config-profile-vrf) # vni [vni-id | [-vni-id]]  
            Configures the virtual network identifier (VNI).
            Note    You can specify a single ID or a range. For example, 4099, 5000-5005.
             
            Step 13switch (config-profile-vrf) # interface vlanvlan-id  

            Specifies an interface type and number. The vlan-id range is from 1 to 4094.

             
            Step 14switch (config-profile-if-vrf) # vrf member name  

            Creates a VPN routing and forwarding instance (VRF) or enters VRF configuration mode to configure submode commands for the Intermediate System-to-Intermediate System (IS-IS) Intradomain Routing Protocol. The name can be any case-sensitive, alphanumeric string up to 32 characters.

             
            Step 15switch (config-profile-if-vrf) # ip address ip-address-mask  

            Specifies a primary IP address for an interface

             
            Step 16switch (config-profile-if-vrf) # no shutdown  

            Disables the shutdown function on a BGP instance.

             
            Step 17switch (config-profile-if) # router bgp as-number  

            Configures a BGP process for an interface. The as-number is the number of an autonomous system that identifies the router to other BGP routers and tags that the routing information passed along. The AS number can be a 16-bit integer or a 32-bit integer in the form of a higher 16-bit decimal number and a lower 16-bit decimal number in xx.xx format.

             
            Step 18switch (config-profile-if) # vrf name  

            Creates a VPN routing and forwarding (VRF) instance or enters VRF configuration mode to configure submode commands for the Intermediate System-to-Intermediate System (IS-IS) Intradomain Routing Protocol. The name can be any case-sensitive, alphanumeric string up to 32 characters.

             
            Step 19switch (config-profile-if-vrf) # address-family ipv4 multicast  

            Enters address family mode or a virtual routing and forwarding (VRF) address-family mode and configures submode commands for BGP.

             
            Step 20switch (config-profile-if-vrf-af) # redistribute hmm route-map map-name  

            Redistributes IPv4 Host Mobility Manager (HMM) routes through specific route maps.

             

            This example shows how to configure the profile name and add the tenant VRF profile and associated parameters: 

            switch # configure profile vrf-tenant-profile
//Enter config profile mode, name = vrf-tenant-profile
//Enter configuration commands, one per line. End with CNTL/Z.
switch (config-profile)# configure terminal
//Exit configure profile mode.
switch (config)# apply profile vrf-tenant-profile
switch (config)# vlan 20
switch (config-profile-vlan)# mode fabricpath
switch (config-profile-vlan)# vn-segment 5000
switch (config-profile-vlan)# vrf context vrf2
switch (config-profile-vrf) # rd auto
switch (config-profile-vrf) #	address-family ipv4 unicast
switch (config-profile-vrf-af-ipv4) # route-target import 7000:1
switch (config-profile-vrf-af-ipv4) # route-target export 7000:1
switch (config-profile-vrf-af-ipv4) # vni 7000
switch (config-profile-vrf-af-ipv4) # interface vlan 20
switch (config-profile-if-verify) # vrf member VRF2
switch (config-profile-if-verify) # ip address 1.1.1.4/24
switch (config-profile-if-verify) # no shutdown
switch (config-profile-if-verify) # router bgp 100
switch (config-profile-router) # vrf VRF2
switch (config-profile-router-vrf) # address-family ipv4 multicast	
switch (config-profile-router-vrf-af) # address-family ipv4 unicast
switch (config-profile-router-vrf-af) # redistribute hmm route-map AM

            Removing HSRP Configuration on all Border Leafs

            During the migration, some hosts start learning the anycast gateway MAC address and will start using it. HSRP is required until the last leaf pair is upgraded to the DFA configuration.

            Note
            HSRP/VRRP is required for VLANs where hosts are connected behind a Cisco Nexus 5000 Series switch in the topology for those VLANs.

            You can remove the HSRP configuration on border leafs after you migrate all of the switches.

               Command or ActionPurpose
              Step 1switch # show running-config interface type-number  

              Displays the interface for the VLAN.

               
              Step 2switch (config) # interface vlan vlan-id  

              Creates a VLAN interface and enters interface configuration mode. The vlan-id range is from 1 to 4094.

               
              Step 3switch (config-if-hsrp) # no hsrp group-number  

              Disables HSRP.

               
              Step 4switch (config-if-hsrp) # show running-config interface type-number  

              Displays an interface type and number.

               
              This example shows how to disable the HSRP configuration on a border leaf: 
              
switch # show running-config interface vlan20 

!Command: show running-config interface Vlan20
!Time: Tue Jun 9 17:56:19 2015

version 7.2(0)N1(1)

interface Vlan20
  no shutdown
  no ip redirects
  ip address 20.1.1.100
  ipv6 address 20:1::100/64
  ip router ospf 1 area 0.0.0.0
  fabric forwarding mode anycast-gateway
  hsrp version 2
  hsrp 20
    preempt
    priority 110
    ip 20.1.1.100
  hsrp 20 ipv6
    preempt
    priority 110
    ip 20:1::10
  hsrp 50
    mac-address DEAD.0000.DEAF
    preempt
    priority 110
    ip 20.1.1.200

switch # configure terminal
switch (config) # interface vlan 20
switch (config-if) # no hsrp 50
switch (config-if) # show running-config interface vlan 20

!Command: show running-config interface Vlan20
!Time: Tue Jun  9 17:58:21 2015

version 7.2(0)N1(1)

interface Vlan20
  no shutdown
  no ip redirects
  ip address 20.1.1.100
  ipv6 address 20:1::100/64
  ip router ospf 1 area 0.0.0.0
  fabric forwarding mode anycast-gateway
  hsrp version 2
  hsrp 20
    preempt
    priority 110
    ip 20.1.1.100
  hsrp 20 ipv6
    preempt
    priority 110
    ip 20:1::10

switch (config-if) # interface vlan 20
switch (config-if) # no hsrp 20 ipv4
switch (config-if) # show running-config interface vlan 20

!Command: show running-config interface Vlan20
!Time: Tue Jun  9 17:59:01 2015

version 7.2(0)N1(1)

interface Vlan20
  no shutdown
  no ip redirects
  ip address 20.1.1.100
  ipv6 address 20:1::100/64
  ip router ospf 1 area 0.0.0.0
  fabric forwarding mode anycast-gateway
  hsrp version 2
  hsrp 20 ipv6
    preempt
    priority 110
    ip 20:1::10

switch (config-if) # interface vlan 20
switch (config-if) # no hsrp 20 ipv6
switch (config-if) # show running-config interface vlan 20

!Command: show running-config interface Vlan20
!Time: Tue Jun  9 17:59:27 2015

version 7.2(0)N1(1)

interface Vlan20
  no shutdown
  no ip redirects
  ip address 20.1.1.100
  ipv6 address 20:1::100/64
  ip router ospf 1 area 0.0.0.0
  fabric forwarding mode anycast-gateway
  hsrp version 2

switch (config-if) # interface vlan 20
switch (config-if) # no hsrp version 2