Setup Guide

In the below example, under the IPv6 address family conguration, only the IPv6 neighbor is enabled using neighbor ipv6–address
activate command. If you execute, clear ip bgp neighbor-ipv4–address soft in command, only the IPv4 route-refresh
update is sent. If you execute
clear ip bgp neighbor-ipv6–address soft incommand, both the IPv4 and IPv6 route-refresh
updates are sent. Following is an example conguration in which IPv6 prexes is enabled for a IPv6 neighbor and the corresponding route-
refresh message:
DellEMC(conf-router_bgp)# show config
!
router bgp 100
redistribute connected
neighbor 20.1.1.2 remote-as 200
neighbor 20.1.1.2 no shutdown
neighbor 20::2 remote-as 200
neighbor 20::2 no shutdown
!
address-family ipv6 unicast
redistribute connected
neighbor 20::2 activate
exit-address-family
!
DellEMC(conf-router_bgp)#do clear ip bgp 20.1.1.2 soft in
May 8 15:28:11 : BGP: 20.1.1.2 sending ROUTE_REFRESH AFI/SAFI (1/1)
May 8 15:28:12 : BGP: 20.1.1.2 UPDATE rcvd packet len 56
May 8 15:28:12 : BGP: 20.1.1.2 rcvd UPDATE w/ attr: origin ?, path 200, nexthop 20.1.1.2,
metric 0,
<output truncated>
DellEMC(conf-router_bgp)#do clear ip bgp 20::2 soft in
May 8 15:40:08 : BGP: 20::2 sending
ROUTE_REFRESH AFI/SAFI (1/1)
May 8 15:40:08 : BGP: 20::2 sending ROUTE_REFRESH AFI/SAFI (2/1)
May 8 15:40:08 : BGP: 20::2 UPDATE rcvd packet len 56
May 8 15:40:08 : BGP: 20::2 rcvd UPDATE w/ attr: origin ?, path 200, nexthop 20.1.1.2, metric
0,
Controlling route-refresh updates
You can control route-refresh updates for IPv4 and IPv6 prexes.
Following is the list of commands to control the route-refresh updates for IPv4 and IPv6 prexes:
Table 11. Command for respective route-refresh updates
Command Route-refresh Updates
clear ip bgp neighbor-ipv4-address ipv4 unicast soft in
Only IPv4 route-refresh updates using IPv4
neighbor
clear ip bgp neighbor-ipv6-address ipv6 unicast soft in
Only IPv6 route-refresh updates using IPv6
neighbor
clear ip bgp neighbor-ipv4-address ipv6 unicast soft in
Only IPv6 route-refresh updates using IPv4
neighbor
clear ip bgp neighbor-ipv6-address ipv4 unicast soft in
Only IPv4 route-refresh updates using IPv6
neighbor
Aggregating Routes
When BGP peers exchange information about the networks, a large BGP routing tables is created. Dell EMC Networking OS provides
multiple ways to aggregate routes to reduced the size of the BGP routing table which helps to improve the network performance by
Border Gateway Protocol (BGP)
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