Command:

synchronization


Mode:

Router(config-router)#

Router(config-router-af)#


Syntax:

synchronization
no synchronization

 

Syntax Description:

This command has no arguments or keywords.

 

Command Description:

To enable the synchronization between BGP and your Interior Gateway Protocol (IGP) system, use the synchronization command in address family or router configuration mode. To enable the Cisco IOS software to advertise a network route without waiting for the IGP, use the no form of this command.

The behavior of this command is enabled by default.

Usually, a BGP speaker does not advertise a route to an external neighbor unless that route is local or exists in the IGP. The no synchronization command allows the Cisco IOS software to advertise a network route without waiting for the IGP. This feature allows routers and access servers within an autonomous system to have the route before BGP makes it available to other autonomous systems.

Use the synchronization command if routers in the autonomous system do not speak BGP.


Example:

The following router configuration mode example enables a router to advertise a network route without waiting for IGP:

Router(config)#router bgp 120
Router(config-router)#no synchronization
 

The following address family configuration mode example enables a router to advertise a network route without waiting for IGP:

Router(config)#router bgp 120
Router(config-router)#address-family ipv4 unicast
Router(config-router-af)#no synchronization


Misconceptions:

None


Related Commands:

address-family ipv4

� Cisco Systems, Inc. 2001, 2002, 2003
World Wide Education

Converted from CHM to HTML with chm2web Pro 2.85 (unicode)