Both BGP peers use default route for session establishment

[yenlinsu]

Hi:

I know that if both BGP peers use default route to establish the TCP session, the session won't come up. BUt what is the reason behind this?

Thanks in advance for your input :)

Yours Sincerely

Allen Su

[Harold Ritter]

Allen,

The reason is that there is a check in the code preventing the session to be actively opened based on the default route.

This check has been there for a long time and was probably to prevent things such as trying to establish iBGP sessions via a default to the Internet.

Hope this helps,