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IGP-LDP Synchronization

Hello,

What is the use of IGP-LDP Synchronization? I mean where we can use IGP-LDP Synchronization? any good example of it...

regards

Devang

3 REPLIES

Re: IGP-LDP Synchronization

Hi Devang,

LDP IGP Synchronization ensures that LDP is fully established before the IGP path is used for switching, and it is supported only on interfaces running OSPF or IS-IS processes, please review this document:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1829/products_feature_guide09186a00802d95dd.html

HTH,

Mohammed Mahmoud.

New Member

Re: IGP-LDP Synchronization

sorry for the post from my colleagues laptop.

Re: IGP-LDP Synchronization

IGP LDP sync drives the point that a interface should not be used untill it has both LDP and IGP adjacency formed across it.

Some scenarios where this can be helpful would be:

When an IGP adjacency is established, the router begins forwarding packets using the new adjacency before the LDP label exchange completes between the peers on that link.

If an LDP session closes, the router continues to forward traffic using the link associated with the LDP peer rather than an alternate pathway with a fully synchronized LDP session.

There are many documents on Cisco.com and can be found easily searching for LDP IGP sync.

HTH-Cheers,

Swaroop

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