3com S7906E Guide De Référence

 

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2: System level 

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 

undo timer 

BGP view/BGP-VPN instance view 

2: System level 

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. 

Use the undo timer command to restore the default. 

By default, BGP keepalive and holdtime intervals are 60s and 180s. 

Note that: