# Enable GR capability for BGP.
[RouterA-bgp] graceful-restart
2.
Configure Router B:
# Configure IP addresses for interfaces. (Details not shown.)
# Configure the EBGP connection.
<RouterB> system-view
[RouterB] bgp 65009
[RouterB-bgp] router-id 2.2.2.2
[RouterB-bgp] peer 200.1.1.2 as-number 65008
# Configure the IBGP connection.
[RouterB-bgp] peer 9.1.1.2 as-number 65009
# Inject networks 200.1.1.0/24 and 9.1.1.0/24 to the BGP routing table.
[RouterB-bgp] network 200.1.1.0 24
[RouterB-bgp] network 9.1.1.0 24
# Enable GR capability for BGP.
[RouterB-bgp] graceful-restart
3.
Configure Router C:
# Configure IP addresses for interfaces. (Details not shown.)
# Configure the IBGP connection.
<RouterC> system-view
[RouterC] bgp 65009
[RouterC-bgp] router-id 3.3.3.3
[RouterC-bgp] peer 9.1.1.1 as-number 65009
# Enable GR capability for BGP.
[RouterC-bgp] graceful-restart
Verifying the configuration
# Ping Router C on Router A. Meanwhile, perform an active/standby switchover on Router B. The ping
operation is successful during the whole switchover process.
Configuring BFD for BGP
Network requirements
As shown in
Configure OSPF as the IGP in AS 200.
•
Establish two IBGP connections between Router A and Router C. When both links are working,
•
Router C adopts the link Router A<—>Router B<—>Router C to exchange packets with network
1.1.1.0/24. Configure BFD over the link. Then if the link fails, BFD can quickly detect the failure and
notify it to BGP. Then the link Router A<—>Router D<—>Router C takes effect immediately.
Figure
71,
239