Users Guide

7. (Optional) Add a remote neighbor, and enter the AS number in ROUTER-TEMPLATE mode.
remote-as as-number
● To add an EBGP neighbor, configure the as-number parameter with a number different from the BGP as-number
configured in the router bgp as-number command.
● To add an IBGP neighbor, configure the as-number parameter with the same BGP as-number configured in the
router bgp as-number command.
NOTE: When you configure an unnumbered interface, do not configure the remote AS number.
8. Assign a peer-template with a peer-group name from which to inherit to the neighbor in ROUTER-NEIGHBOR mode.
●
For peers with an IP address:
inherit template template-name
● For peers with unnumbered interfaces:
inherit template template-name inherit-type {ebgp | ibgp}
9. Enable the neighbor in ROUTER-BGP mode.
no shutdown
A neighbor may keep its configuration after it is added to a peer group if the neighbor configuration is more specific than the
peer group and if the neighbor configuration does not affect outgoing updates.
To display the peer-group configuration assigned to a BGP neighbor, use the show ip bgp peer-group peer-group-
name command. The show ip bgp neighbor command output does not display peer-group configurations.
The following example shows a sample configuration:
Configure peer templates
OS10# configure terminal
OS10(config)# router bgp 64601
OS10(config-router-bgp-64601)# template leaf_v4
OS10(config-router-template)# description peer_template_1_abcd
OS10(config-router-template)# address-family ipv4 unicast
OS10(config-router-bgp-template-af)# distribute-list leaf_v4_in in
OS10(config-router-bgp-template-af)# distribute-list leaf_v4_out out
OS10(config-router-bgp-template-af)# route-map set_aspath_prepend in
OS10(config-router-bgp-template-af)# exit
OS10(config-router-template)# exit
OS10(config-router-bgp-64601)# neighbor 100.5.1.1
OS10(config-router-neighbor)# inherit template leaf_v4
OS10(config-router-neighbor)# remote-as 64802
OS10(config-router-neighbor)# no shutdown
OS10(config-router-neighbor)# exit
OS10(config-router-bgp-64601)# neighbor 100.6.1.1
OS10(config-router-neighbor)# inherit template leaf_v4
OS10(config-router-neighbor)# remote-as 64802
OS10(config-router-neighbor)# no shutdown
View peer group status
OS10# show ip bgp peer-group leaf_v4
Peer-group leaf_v4, remote AS 0
BGP version 4
Minimum time between advertisement runs is 30 seconds
Description: peer_template_1_abcd
For address family: Unicast
BGP neighbor is leaf_v4, peer-group external
Update packing has 4_OCTET_AS support enabled
Number of peers in this group 2
Peer-group members:
Layer 3
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