Step 1 |
enable
Example:
|
Enables privileged EXEC mode.
|
Step 2 |
configure terminal
Example:
Device# configure terminal
|
Enters global configuration mode.
|
Step 3 |
router bgp
autonomous-system-number
Example:
Device(config)# router bgp 45000
|
Enters router configuration mode to create or configure a BGP routing process.
|
Step 4 |
scope {global |
vrf
vrf-name}
Example:
Device(config-router)# scope global
|
Defines the scope for the BGP routing process and enters router scope configuration mode.
BGP general session commands that apply to a single network, or a specified virtual and routing forwarding (VRF) instance, are entered in this configuration mode.
Use the
global keyword to specify that BGP uses the global routing table.
Use the
vrf
vrf-name keyword and argument to specify that BGP uses a specific VRF routing table. The VRF must already exist.
|
Step 5 |
neighbor {ip-address |
peer-group-name}
remote-as
autonomous-system-number
Example:
Device(config-router-scope)# neighbor 172.16.1.2 remote-as 45000
|
Adds the IP address of the neighbor in the specified autonomous system to the multiprotocol BGP neighbor table of the local device.
|
Step 6 |
neighbor {ip-address |
peer-group-name}
transport {connection-mode {active |
passive} |
path-mtu-discovery |
multi-session |
single-session}
Example:
Device(config-router-scope)# neighbor 172.16.1.2 transport multi-session
|
Enables a TCP transport session option for a BGP session.
Use the
connection-mode keyword to specify the type of connection, either active or passive.
Use the
path-mtu-discovery keyword to enable the TCP transport path maximum transmission unit (MTU) discovery.
Use the
multi-session keyword to specify a separate TCP transport session for each address family.
Use the
single-session keyword to specify that all address families use a single TCP transport session.
|
Step 7 |
address-family ipv4 [mdt |
multicast |
unicast]
Example:
Device(config-router-scope)# address-family ipv4
|
Specifies the IPv4 address family and enters router scope address family configuration mode.
Use the
mdt keyword to specify IPv4 multicast distribution tree (MDT) address prefixes.
Use the
multicast keyword to specify IPv4 multicast address prefixes.
Use the
unicast keyword to specify the IPv4 unicast address family. By default, the device is placed in address family configuration mode for the IPv4 unicast address family if the
unicast keyword is not specified with the
address-family ipv4
command.
Nontopology-specific configuration parameters are configured in this configuration mode.
|
Step 8 |
topology {base |
topology-name}
Example:
Device(config-router-scope-af)# topology VIDEO
|
Configures the topology instance in which BGP routes class-specific or base topology traffic, and enters router scope address family topology configuration mode.
|
Step 9 |
bgp tid
number
Example:
Device(config-router-scope-af-topo)# bgp tid 100
|
Associates a BGP routing process with the specified topology ID.
|
Step 10 |
neighbor
ip-address
activate
Example:
Device(config-router-scope-af-topo)# neighbor 172.16.1.2 activate
|
Enables the BGP neighbor to exchange prefixes for the network service access point (NSAP) address family with the local device.
Note
| If you have configured a peer group as a BGP neighbor, do not use this command because peer groups are automatically activated when any peer group parameter is configured.
|
|
Step 11 |
neighbor {ip-address |
peer-group-name}
translate-topology
number
Example:
Device(config-router-scope-af-topo)# neighbor 172.16.1.2 translate-topology 200
|
(Optional) Configures BGP to install routes from a topology on another device to a topology on the local device.
|
Step 12 |
end
Example:
Device(config-router-scope-af-topo)# end
|
(Optional) Exits router scope address family topology configuration mode and returns to privileged EXEC mode.
|
Step 13 |
clear ip bgp topology
{* |
topology-name} {as-number |
dampening [network-address [network-mask]] |
flap-statistics [network-address [network-mask]] |
peer-group
peer-group-name |
table-map |
update-group [number |
ip-address]} [in [prefix-filter] |
out |
soft [in [prefix-filter] |
out]]
Example:
Device# clear ip bgp topology VIDEO 45000
|
Resets BGP neighbor sessions under a specified topology or all topologies.
|
Step 14 |
show ip bgp topology {* |
topology}
summary
Example:
Device# show ip bgp topology VIDEO summary
|
(Optional) Displays BGP information about a topology.
Note
| Only the syntax required for this task is shown. For more details, see the
Cisco IOS IP Routing: BGP Command Reference.
|
|