I am now actually on a proctor labs' 7200/ATM Rack now doing the second VOL
II lab and I see exactly what you describe – it works with just enabling
"send-label" on the ASBRs (and "set mpls-label" if there is a route-map in
between).

 

I cannot think of a reason of doing the LSP as a BGP LSP from end to end –
can anyone else comment here about this also?

 

BTW – thanks André Luiz Bernardes for helping me before …. – I will do the
1st lab tomorrow again – hopefully will understand it all and all will work
eventually after I am done with it ….

 

 

Shai L

 

From: [email protected]
[mailto:[email protected]] On Behalf Of Andr? Luiz
Bernardes
Sent: Friday, October 30, 2009 4:17 PM
To: [email protected]
Subject: [OSL | CCIE_SP] BGP Labels, send or not to send....

 

Hello guys

I have this doubt here.. when configuring Inter-AS VPN we have to build an
e2e label path to get VPN traffic flow between ISPs. Most of the times we
are required to exchange loopbacks labels via IPv4 eBGP sessions between ASs
since LDP is not allowed.

Well... I have done this several times already on different vendor's
wookbooks and that works fine just by configuring BGP send-label feature
(and mpls set-label on route-maps) only on EBGP sessions. My questions is
why worbook solutions always require configuring BGP label distribuition
also for IBGP session? Is this just a best practice or is there any
underlying issue that does not come up on workbook scenarios due to reduced
topology...

Thanks

Andr'e

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