3com MSR 20-20 참조 매뉴얼

C

HAPTER

 72: BGP C

ONFIGURATION

 C

OMMANDS

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] summary automatic 

BGP view

None

Use the synchronization command to enable the synchronization between the 
BGP and IGP routes.

Use the undo synchronization command to disable the synchronization.

The feature is disabled by default.

With this feature enabled and when a non-BGP router is responsible for 
forwarding packets in an AS, BGP speakers in the AS cannot advertise routing 
information to other ASs unless all routers in the AS know the latest routing 
information.

When a BGP router receives an IBGP route, it checks only whether the next hop is 
reachable by default. If the synchronization is enabled, the IBGP route is 
synchronized and advertised to EBGP peers only when the route is also advertised 
by IGP. Otherwise, the IBGP route cannot be advertised to EBGP peers.

# Enable the synchronization between BGP and IGP routes.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] synchronization 

timer keepalive keepalive hold holdtime

BGP view/BGP-VPN instance view

keepalive: Keepalive interval in seconds, ranging from 1 to 21845.

holdtime: Holdtime interval in seconds, ranging from 3 to 65535.

Use the timer command to configure BGP keepalive interval and holdtime 
interval.