From: Saad Adam (subjectvsobject@yahoo.com)
Date: Sun Feb 12 2006 - 05:06:34 GMT-3
Hi Venkat / Ajay,
I guess what Ajay meant was the eBGP peering could happen between a neighbor using , a longer or a non prefered patch.
The ebgp multihop command does not dictate the path to reach the neighbor, it simply specifies the MAX number of hops to the neighbor after which the packets will timeout, The path to the neighbor is determined from the IGP table.
To clarify it more, if you have a peer who is 5 hops away, you can set a ttl value to 5 or more. If you set it to 5, and for some reason the neighbor is routed throught a longer IGP patch of more than 5 hops. The peer relationship will fail in this case.
To be on the safe side and if you are using your IGP routing is using the right patch, you can put a higher ttl. You can also use the traceroute to verify the way your router takes to reach an remote neighbor.
Best regards,
Saad.
Venkatesh Palani <kvpalani@gmail.com> wrote:
HI Ajay,
Could you please exaplain what does it mean by "eBGP neighborship can be
setup using a sub-optimal routing path" and what are its impacts ?, because
I always thought the TTL values is to do with secuirty ( correct me if I am
wrong).
Thank you,
Venkatesh
On 2/12/06, ajay@topguntechnologies.com wrote:
>
> Hi,
> The only issue with not specifying the ttl value(or prob. not restricting
> it to a particular value) is that the eBGP neighborship can be setup using
a
> sub-optimal routing path.
>
>
> HTH
>
> Ajay Pandey, CCIE # 14792
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Wed Mar 01 2006 - 11:28:17 GMT-3