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DES-7200 Configuration Guide Chapter 6 BGP
Configuration
6-63
Check wheter these devices support the configuration commands of BGP GR and
OSPF GR. For details, refer to Step 3.
3，Enable OSPF GR on R2
DES-7200(config)# router ospf 1
DES-7200(config-router)# graceful-restart
4，Enable BGP GR on R2
DES-7200(config)# router bgp 100
DES-7200(config-router)# graceful-restart
5，Enable BGP GR on neighbors to support the GR Helper of BGP
DES-7200(config)# router bgp 100
DES-7200(config-router)# bgp graceful-restart
For negotiation of BGP GR, both sides of the BGP connection need to enable
BGP GR. Hence, R2 needs to negotiate with its neighbors which serve as the GR
Helper to assist BGP GR.
6，Restart all BGP connections on R2 to neotitate GR capabitliy
DES-7200# clear ip bgp *
Check configuration
In order for R2 to enable continuous data forwarding during engine handover,
check the negotiation of BGP GR and OSPF GR configration.
Ensure that BGP GR negitation with all neighbors succeed.
DES-7200# show ip bgp neighbors
BGP neighbor is 192.168.195.183, remote AS 200, local AS 100, external link
Using BFD to detect fast fallover - BFD session state up
BGP version 4, remote router ID 10.0.0.1
BGP state = Established, up for 00:06:37
Last read 00:06:37, hold time is 180, keepalive interval is 60 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: advertised and received
Graceful restart: advertised and received
Remote Restart timer is 120 seconds
Address families preserved by peer:
None
Here “Graceful restart: advertised and received” means BGP GR negotiation of
the BGP connection succeeds. Here you need to make sure that BGP GR
negotiation of all BGP connections succeeds.