From: Peter Svidler (doubleccie@yahoo.com)
Date: Tue Mar 03 2009 - 20:05:30 ARST
THANKS A LOT...that make sense now .
can you provide any feedback on my other post ( MPLS VPN simple question ) :)
..since you get the correct answers :)))
--- On Tue, 3/3/09, Roman Rodichev <roman@iementor.com> wrote:
From: Roman Rodichev <roman@iementor.com>
Subject: RE: MPLS send-label
To: "'Peter Svidler'" <doubleccie@yahoo.com>, ccielab@groupstudy.com,
smorris@internetworkexpert.com
Date: Tuesday, March 3, 2009, 4:52 PM
Yes, if it's the last BGP session in a chain, then you'll need to
redistribute routes into something. The reason for it is that LFIB will not
populate until there's an "IN" label for the prefix created by
the router.
IOS won't create the IN label until it's either:
1. Redistributed into some IGP (it doesn't have to be a real IGP in use, a
simple "router ospf 1" + "redistribute bgp X subnets" will
do)
2. The prefix has to be forwarded on by BGP to another eBGP or iBGP
send-label peer.
If you do "show ip bgp labels" and you don't see an
"In" label for the
prefix, the prefix will not appear in the LFIB.
Roman Rodichev
5xCCIE #7927 (R&S, Security, Voice, Storage, Service Provider)
Instructor, Content Developer
ieMentor Corporation http://www.iementor.com
Y!M: roman7927
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Peter Svidler
Sent: Tuesday, March 03, 2009 3:35 PM
To: ccielab@groupstudy.com; 'Roman Rodichev';
smorris@internetworkexpert.com
Subject: RE: MPLS send-label
ok again :)
so when i peer from the loopbacks , even though i receive the labels via
BGP ..it does not automatically gets installed in the LFIB ..which means
another way is required ( such as redistributing BGP into IGP ) to get it
done
.
and for the RFC thing ..probably the Cisco lab guys have to ask questions
based on that :)))
--- On Tue, 3/3/09, Scott Morris <smorris@internetworkexpert.com> wrote:
From: Scott Morris <smorris@internetworkexpert.com>
Subject: RE: MPLS send-label
To: "'Peter Svidler'" <doubleccie@yahoo.com>,
ccielab@groupstudy.com,
"'Roman
Rodichev'" <roman@iementor.com>
Date: Tuesday, March 3, 2009, 4:13 PM
Then you'll need to have a recusive lookup to get to that loopback address!
And a label to match!
Scott
PS. Your eBGP peers are SUPPOSED to (by RFC) be peering with directly
connected interfaces. :)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Peter Svidler
Sent: Tuesday, March 03, 2009 3:57 PM
To: ccielab@groupstudy.com; Roman Rodichev
Subject: RE: MPLS send-label
Hi Roman ,
what if the peering is not from the directly connected IP addressing but
from
the loopbacks ?
--- On Tue, 3/3/09, Roman Rodichev <roman@iementor.com> wrote:
From: Roman Rodichev <roman@iementor.com>
Subject: RE: MPLS send-label
To: "'Peter Svidler'" <doubleccie@yahoo.com>,
ccielab@groupstudy.com
Date: Tuesday, March 3, 2009, 3:54 PM
No you don't have to. The router that receives BGP routes with labels will
put them into the LFIB.
Roman Rodichev
5xCCIE #7927 (R&S, Security, Voice, Storage, Service Provider)
Instructor, Content Developer
ieMentor Corporation http://www.iementor.com
Y!M: roman7927
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Peter Svidler
Sent: Tuesday, March 03, 2009 2:50 PM
To: ccielab@groupstudy.com
Subject: MPLS send-label
Folks ,
just i want to confirm this , when i use the IPV4 send-label option between
two PE's running IPV4
even though the labels are send via BGP , it does not insall automatically
in
the MPLS table , i still need to redistribute BGP into IGP to get this the
prefixes installed in the MPLS forwarding table ..is this correct ?
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Mon Apr 06 2009 - 06:44:03 ART