285
<SwitchC> system-view
[SwitchC] bgp 65009
[SwitchC-bgp] router-id 3.3.3.3
[SwitchC-bgp] peer 9.1.1.1 as-number 65009
# Enable GR capability for BGP.
[SwitchC-bgp] graceful-restart
# Enable Switch C to exchange IPv4 unicast routing information with Switch B.
[SwitchC-bgp-ipv4] peer 9.1.1.1 enable
Verifying the configuration
Ping Switch C on Switch A. Meanwhile, perform an active/standby switchover on Switch B. The ping
operation is successful during the whole switchover process.
BFD for BGP configuration example
Network requirements
As shown in Figure 72,
• Configure OSPF as the IGP in AS 200.
• Establish two IBGP connections between Switch A and Switch C. When both paths are working,
Switch C adopts the path Switch A<—>Switch B<—>Switch C to exchange packets with network
1.1.1.0/24. Configure BFD over the path. If the path fails, BFD can quickly detect the failure and
notify it to BGP. Then the path Switch A<—>Switch D<—>Switch C takes effect immediately.
Figure 72 Network diagram
Device Interface IP address
Device
Interface IP address
Switch A Vlan-int100 3.0.1.1/24 Switch C Vlan-int101 3.0.2.2/24
Vlan-int200 2.0.1.1/24
Vlan-int201 2.0.2.2/24
Switch B Vlan-int100 3.0.1.2/24
Switch D
Vlan-int200 2.0.1.2/24
Vlan-int101 3.0.2.1/24 Vlan-int201 2.0.2.1/24
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