BGP "no synchronization" command not showing up in running-config

What is BGP No Synchronization?

BGP No Synchronization is a configuration command used in Border Gateway Protocol (BGP) to prevent the router from exchanging routes with peers until all of its own routes have been validated. This command is a safeguard to ensure that the router does not advertise invalid routes to its peers.

When should BGP No Synchronization be used?

BGP No Synchronization should be used when configuring a router to be a BGP peer. It is not required but is recommended to prevent the router from exchanging invalid routes with its peers. This command is especially important when configuring a router to be part of a multi-homed BGP network, as it ensures that the router does not advertise invalid routes to the other peers in the network.

What happens if BGP No Synchronization is not configured?

If BGP No Synchronization is not configured, then the router will exchange routes with its peers before validating its own routes. This could cause the router to advertise invalid or incorrect routes to its peers, which could result in routing loops or other issues.

How do you configure BGP No Synchronization?

To configure BGP No Synchronization, you need to use the “no synchronization” command under the BGP router configuration mode. For example, if you are configuring a router to be a BGP peer, you would use the following command:

router bgp {as-number}

no synchronization

Once this command is configured, the router will not exchange routes with its peers until it has validated its own routes.

What if you already have BGP No Synchronization configured but it is not showing up in the running configuration?

If you already have BGP No Synchronization configured but it is not showing up in the running configuration, then it could be the result of a misconfiguration or a bug. It is important to check the configuration for any errors or typos, as this could be the cause of the issue. If the configuration looks correct, then it is possible that the router is experiencing a bug and you should contact the manufacturer for support.

Conclusion

BGP No Synchronization is a configuration command used in Border Gateway Protocol (BGP) to prevent the router from exchanging routes with peers until all of its own routes have been validated. This command is a safeguard to ensure that the router does not advertise invalid routes to its peers. It is not required but is recommended to prevent the router from exchanging invalid routes with its peers. To configure BGP No Synchronization, you need to use the “no synchronization” command under the BGP router configuration mode. If you already have BGP No Synchronization configured but it is not showing up in the running configuration, then it could be the result of a misconfiguration or a bug and you should check the configuration for any errors or typos or contact the manufacturer for support.