eBGP TTL matching requirement

Patrick W. Gilmore patrick at ianai.net
Tue May 11 13:10:57 CDT 2010


On May 11, 2010, at 1:55 PM, Vitto Capabianco wrote:

> Is there a TTL value enforcment on EBGP session establishment

No.

-- 
TTFN,
patrick


> For some
> reason I thought that both peers have to have the SAMe value?  Is that
> true?  For example:
> 
> default EBGP = TTL = 1 (if one end sends something other than 1 in its OPEN
> message, we won't bring up the adjecancy)
> multihop EBGP = TTL  = 255 (by default) - likewise, if one end sends
> something else, adjecancy won't come up
> multihop EBGP = TTL = modified hop value - ex. 15 (both ends have to have
> it)
> 
> 
> I understand that ttl-security and its implications.
> 
> Thanks,
> 
> Vitto
> 





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