Configuring Bud Node

This chapter contains the following sections:

VXLAN Bud Node Over vPC Overview

Figure 1. Underlay Network Based on PIM-SM and OSPF

Note

For bud-node topologies, the source IP of the VTEP behind vPC must be in the same subnet as the infra VLAN. This SVI should have proxy ARP enabled. For example: 


Interface Vlan2 
ip proxy-arp

Note

The system nve infra-vlans command specifies VLANs used for all SVI interfaces, for uplink interfaces with respect to bud-node topologies, and vPC peer-links in VXLAN as infra-VLANs. You must not configure certain combinations of infra-VLANs. For example, 2 and 514, 10 and 522, which are 512 apart.

For Cisco Nexus 9200, 9300-EX, and 9300-FX/FX2 platform switches, use the system nve infra-vlans command to configure any VLANs that are used as infra-VLANs.

VXLAN Bud Node Over vPC Topology Example

  • Enable the required features: 
    

feature ospf
feature pim
feature interface-vlan
feature vn-segment-vlan-based
feature hsrp
feature lacp
feature vpc
feature nv overlay

  • Configuration for PIM anycast RP.

    In this example, 1.1.1.1 is the anycast RP address. 
    

ip pim rp-address 1.1.1.1 group-list 225.0.0.0/8

  • VLAN configuration

    In this example, tenant VLANs 101-103 are mapped to vn-segments. 
    

vlan 1-4,101-103,2000
vlan 101
  vn-segment 10001
vlan 102
  vn-segment 10002
vlan 103
  vn-segment 10003
  • vPC configuration 
    
vpc domain 1
  peer-switch
  peer-keepalive destination 172.31.144.213
  delay restore 180
  peer-gateway
  ipv6 nd synchronize
  ip arp synchronize
  • Infra VLAN SVI configuration 
    

interface Vlan2
  no shutdown
  no ip redirects
  ip proxy-arp
  ip address 10.200.1.252/24
  no ipv6 redirects
  ip router ospf 1 area 0.0.0.0
  ip pim sparse-mode
  ip igmp static-oif route-map match-mcast-groups
  hsrp version 2
  hsrp 1 
    ip 10.200.1.254

  • Route-maps for matching multicast groups

    Each VXLAN multicast group needs to have a static OIF on the backup SVI MCT. 
    

route-map match-mcast-groups permit 1
  match ip multicast group 225.1.1.1/32

  • Backup SVI over MCT configuration

    • Configuration Option 1: 
      

interface Vlan2000
no shutdown
ip address 20.20.20.1/24
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
    • Configuration Option 2: 
      

interface Vlan2000
no shutdown
ip address 20.20.20.1/24
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
  • vPC interface configuration that carries the infra VLAN 
    

interface port-channel1
  switchport mode trunk
  switchport trunk allowed vlan 2
  vpc 1
  • MCT configuration 
    

interface port-channel100
  switchport mode trunk
  spanning-tree port type network
  vpc peer-link

  • Note

    You can choose either of the following two command procedures for creating the NVE interfaces. Use the first one for a small number of VNIs. Use the second procedure to configure a large number of VNIs.

    NVE configuration

    Option 1

    

interface nve1
  no shutdown
  source-interface loopback0
  member vni 10001 mcast-group 225.1.1.1
  member vni 10002 mcast-group 225.1.1.1
  member vni 10003 mcast-group 225.1.1.1

    Option 2

    

interface nve1
  no shutdown
  source-interface loopback0
  global mcast-group 225.1.1.1
  member vni 10001
  member vni 10002 
  member vni 10003
  • Loopback interface configuration 
    

interface loopback0
  ip address 101.101.101.101/32
  ip address 99.99.99.99/32 secondary
  ip router ospf 1 area 0.0.0.0
  ip pim sparse-mode
  • Show commands 
    

tor1# sh nve vni 
Codes: CP - Control Plane        DP - Data Plane          
       UC - Unconfigured         SA - Suppress ARP
       
Interface VNI      Multicast-group   State Mode Type [BD/VRF]      Flags
--------- -------- ----------------- ----- ---- ------------------ -----
nve1      10001    225.1.1.1         Up    DP   L2 [101]                
nve1      10002    225.1.1.1         Up    DP   L2 [102]                
nve1      10003    225.1.1.1         Up    DP   L2 [103]               

tor1# sh nve peers 
Interface Peer-IP          State LearnType Uptime   Router-Mac       
--------- ---------------  ----- --------- -------- -----------------
nve1      10.200.1.1       Up    DP        00:07:23 n/a              
nve1      10.200.1.2       Up    DP        00:07:18 n/a              
nve1      102.102.102.102  Up    DP        00:07:23 n/a      


tor1# sh ip mroute 225.1.1.1
IP Multicast Routing Table for VRF "default"

(*, 225.1.1.1/32), uptime: 00:07:41, ip pim nve static igmp 
  Incoming interface: Ethernet2/1, RPF nbr: 10.1.5.2
  Outgoing interface list: (count: 3)
    Vlan2, uptime: 00:07:23, igmp
    Vlan2000, uptime: 00:07:31, static
    nve1, uptime: 00:07:41, nve

(10.200.1.1/32, 225.1.1.1/32), uptime: 00:07:40, ip mrib pim nve 
  Incoming interface: Vlan2, RPF nbr: 10.200.1.1
  Outgoing interface list: (count: 3)
    Vlan2, uptime: 00:07:23, mrib, (RPF)
    Vlan2000, uptime: 00:07:31, mrib
    nve1, uptime: 00:07:40, nve

(10.200.1.2/32, 225.1.1.1/32), uptime: 00:07:41, ip mrib pim nve 
  Incoming interface: Vlan2, RPF nbr: 10.200.1.2
  Outgoing interface list: (count: 3)
    Vlan2, uptime: 00:07:23, mrib, (RPF)
    Vlan2000, uptime: 00:07:31, mrib
    nve1, uptime: 00:07:41, nve

(99.99.99.99/32, 225.1.1.1/32), uptime: 00:07:41, ip mrib pim nve 
  Incoming interface: loopback0, RPF nbr: 99.99.99.99
  Outgoing interface list: (count: 3)
    Vlan2, uptime: 00:07:23, mrib
    Vlan2000, uptime: 00:07:31, mrib
    Ethernet2/5, uptime: 00:07:39, pim
(102.102.102.102/32, 225.1.1.1/32), uptime: 00:07:40, ip mrib pim nve 
  Incoming interface: Ethernet2/1, RPF nbr: 10.1.5.2
  Outgoing interface list: (count: 1)
    nve1, uptime: 00:07:40, nve


tor1# sh vpc
Legend:
                 - local vPC is down, forwarding via vPC peer-link

vPC domain id                     : 1   
Peer status                       : peer adjacency formed ok      
vPC keep-alive status             : peer is alive                 
Configuration consistency status  : success 
Per-vlan consistency status       : success                       
Type-2 consistency status         : success 
vPC role                          : secondary, operational primary
Number of vPCs configured         : 4   
Peer Gateway                      : Enabled
Dual-active excluded VLANs        : -
Graceful Consistency Check        : Enabled
Auto-recovery status              : Disabled
Delay-restore status              : Timer is off.(timeout = 180s)
Delay-restore SVI status          : Timer is off.(timeout = 10s)

vPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans    
--   ----   ------ --------------------------------------------------
1    Po100  up     1-4,101-103,2000                                       

vPC status
----------------------------------------------------------------------
id   Port   Status Consistency Reason                     Active vlans
--   ----   ------ ----------- ------                     ------------
1    Po1    up     success     success                    2               
                                                                          
2    Po2    up     success     success                    2  

tor1# sh vpc consistency-parameters global 

    Legend:
        Type 1 : vPC will be suspended in case of mismatch

Name                        Type  Local Value            Peer Value             
-------------               ----  ---------------------- -----------------------
Vlan to Vn-segment Map      1     3 Relevant Map(s)      3 Relevant Map(s)     
STP Mode                    1     Rapid-PVST             Rapid-PVST            
STP Disabled                1     None                   None                  
STP MST Region Name         1     ""                     ""                    
STP MST Region Revision     1     0                      0                     
STP MST Region Instance to  1                                                  
 VLAN Mapping                                                                  
STP Loopguard               1     Disabled               Disabled              
STP Bridge Assurance        1     Enabled                Enabled               
STP Port Type, Edge         1     Normal, Disabled,      Normal, Disabled,     
BPDUFilter, Edge BPDUGuard        Disabled               Disabled              
STP MST Simulate PVST       1     Enabled                Enabled               
Nve Oper State, Secondary   1     Up, 99.99.99.99, DP    Up, 99.99.99.99, DP   
IP, Host Reach Mode                                                            
Nve Vni Configuration       1     10001-10003            10001-10003           
Interface-vlan admin up     2     2,2000                 2,2000                
Interface-vlan routing      2     1-4,2000               1-4,2000              
capability                                                                     
Allowed VLANs               -     1-4,101-103,2000       1-4,101-103,2000      
Local suspended VLANs       -     -