H3C Technologies H3C S12500 Series Switches - Manual (Page 405)

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Vlan-int200 2000::1/64 Vlan-int201 2001::3/64
Switch B Vlan-int100 3000::2/64 Switch D Vlan-int200 2000::2/64
Vlan-int101 3001::2/64 Vlan-int201 2001::2/64
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Configure OSPFv3 to make sure that Switch A and Switch C are reachable to each other. (Details
not shown.)
3. Configure IPv6 BGP on Switch A:
# Establish two IBGP connections between Switch A and Switch C.
system-view
[SwitchA] bgp 200
[SwitchA-bgp] ipv6-family
[SwitchA-bgp-af-ipv6] network 1200:: 64
[SwitchA-bgp-af-ipv6] peer 3001::3 as-number 200
[SwitchA-bgp-af-ipv6] peer 2001::3 as-number 200
[SwitchA-bgp-af-ipv6] quit
# When the two links between Switch A and Switch C are both up, Switch C adopts the link Switch
A<—>Switch B<—>Switch C to exchange packets with network 1200::0/64. (Set a higher MED
value for route 1200::0/64 sent to peer 2001::3 on Switch A.)
{
Create IPv6 ACL 2000 to permit 1200::0/64 to pass.
[SwitchA] acl ipv6 number 2000
[SwitchA-acl6-basic-2000] rule permit source 1200::0 64
[SwitchA-acl6-basic-2000] quit
{
Create two route policies, apply_med_50 and apply_med_100. Policy apply_med_50 sets the
MED for route 1200::0/64 to 50. Policy apply_med_100 sets that to 100.
[SwitchA] route-policy apply_med_50 permit node 10
[SwitchA-route-policy] if-match ipv6 address acl 2000
[SwitchA-route-policy] apply cost 50
[SwitchA-route-policy] quit
[SwitchA] route-policy apply_med_100 permit node 10
[SwitchA-route-policy] if-match ipv6 address acl 2000
[SwitchA-route-policy] apply cost 100
[SwitchA-route-policy] quit
{
Apply routing policy apply_med_50 to routes outgoing to peer 3001::3, and apply routing
policy apply_med_100 to routes outgoing to peer 2001::3.
[SwitchA] bgp 200
[SwitchA-bgp] ipv6-family
[SwitchA-bgp-af-ipv6] network 1200:: 64
[SwitchA-bgp-af-ipv6] peer 3001::3 route-policy apply_med_50 export
[SwitchA-bgp-af-ipv6] peer 2001::3 route-policy apply_med_100 export
# Configure BFD over the link to peer 3001::3 so that when the link Switch A<—>Switch
B<—>Switch C fails, BFD can quickly detect the failure and notify it to IPv6 BGP, and then the link
Switch A<—>Switch D<—>Switch C takes effect immediately.
[SwitchA-bgp-af-ipv6] peer 3001::3 bfd
[SwitchA-bgp-af-ipv6] quit