Re: [isp-bgp] BGP multihop

[vdadlaney@...]

Hi Ton,

This is a quote directly from cisco's website.

" To avoid the accidental creation of loops through oscillating routes, the multihop session will not be established if the only route to the multihop peer's address is the default route (0.0.0.0). "

Here's the link. Watch the word wrap or you can google "configuring bgp" and than search for the text above in the document.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/np1_c/1cprt1/1cbgp.htm


Thanks

Regards,

Vikram


> ANY route will do. Even Default Gateway, or any other dynamic routing 
> protocol. 
> Heck, even a BGP route (from a different BGP process, but Cisco will not 
> let you code more than one BGP instance per router) could do the trick.
> 
> as long as the route covers the destination, is valid, has a reverse 
> path, the BGP session would come up
> 
> Ton
> 
> vdadlaney@... wrote:
> 
> >Hi All,
> >
> >Just to add I believe that you need a specific route to the ip you specify in 
> the neighbor statement. Usually EBGP is configured via a directly connected link 
> to the neighbor but in cases where the neighbor might not be directly connected 
> you would have to specify ebgp multiphop since the ttl on EBGP is 1 by default. 
> You cannot use a default route for the peering relationship. It has to be 
> specific. Please correct me if I am wrong. Thanks
> >
> >Regards,
> >
> >Vikram
> >
> >  
> >
> 
> 




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