H3C Technologies H3C S5560 Series Switches - Manual (Page 286)

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Task Command
Display BGP IPv6 unicast address family
update group information.
display bgp update-group ipv6 [ unicast ] [ ip-address |
ipv6-address ]
display bgp update-group ipv6 [ unicast ] vpn-instance
vpn-instance-name [ ipv6-address ]
Reset IPv6 unicast BGP sessions.
reset bgp { as-number | ipv6-address | all | external | group
group-name | internal } ipv6 [ unicast ] [ vpn-instance
vpn-instance-name ]
reset bgp ip-address ipv6 [ unicast ]
Clear dampened BGP IPv6 unicast routing
information and release suppressed
routes.
reset bgp dampening ipv6 [ unicast ] [ vpn-instance
vpn-instance-name ] [ network-address prefix-length ]
Clear BGP IPv6 unicast route flap
information.
reset bgp flap-info ipv6 [ unicast ] [ vpn-instance
vpn-instance-name ] [ network-address prefix-length | as-path-acl
as-path-acl-number | peer ipv6-address ]
IPv4 BGP configuration examples
Basic BGP configuration example
Network requirements
As shown in Figure 63 , all switches run BGP. Run EBGP between Switch A and Switch B, and run IBGP
between Switch B and Switch C to allow Switch C to access network 8.1.1.0/24 connected to Switch A.
Figure 63 Network diagram
Requirements analysis
To prevent route flapping caused by port state changes, this example uses loopback interfaces to
establish IBGP connections. Because loopback interfaces are virtual interfaces, use the peer
connect-interface command to specify the loopback interface as the source interface for establishing
BGP connections. Enable OSPF in AS 65009 to make sure that Switch B can communicate with Switch
C through loopback interfaces.
The EBGP peers, Switch A and Switch B (usually belong to different carriers), are located in different ASs.
Typically, their loopback interfaces are not reachable to each other, so directly connected interfaces are
used for establishing EBGP sessions. To enable Switch C to access the network 8.1.1.0/24 connected
directly to Switch A, inject network 8.1.1.0/24 to the BGP routing table of Switch A.