RE: Cannot form LDP peer

Not that I know of.but read up as I am fairly new to LDP/MPLS as well having
passed the 3.0 R/S lab.

Regards,

Joe Astorino
CCIE #24347 (R&S)
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
  

From: Jerry Chan [mailto:temjin1997_at_gmail.com]
Sent: Monday, June 22, 2009 5:34 AM
To: Joe Astorino
Cc: Cisco certification
Subject: Re: Cannot form LDP peer

Hi Joe,

Thanks for your reply.
as you say, i can make sure that there is no ACL or blocking between each
other.
howeve, i want to know that are there is any command that can directly form
LDP peer,
like ospf having a "nei x.x.x.x" command that can bypass hello packet?

thanks,
Jerry

2009/6/22 Joe Astorino <jastorino_at_ipexpert.com>

OK, yeah I just noticed that as well.so it probably is using the .12 address
as the ID because it is lower.OK, well the only other thing I really can
think of is make sure you have no ACLs or anything (I believe LDP uses
UDP).and maybe try it on real equipment, or perhaps somebody else can chime
in here if they have done this successfully on GNS3. I mean, it is a fairly
straight forward thing like you said. I think this should work.

Regards,

Joe Astorino
CCIE #24347 (R&S)
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
  

From: Jerry Chan [mailto:temjin1997_at_gmail.com]
Sent: Monday, June 22, 2009 5:04 AM
To: Joe Astorino
Subject: Re: Cannot form LDP peer

that is one of R1 ip address, and that is using to form a LDP peer with R2
the topology like this

R3 --------------------------------------- R1
--------------------------------------- R2
    (serial 150.1.13.0/24) (eth 150.1.12.0/24)

2009/6/22 Joe Astorino <jastorino_at_ipexpert.com>

Are you sure your IP addressing is correct? In the debugs it mentions
150.1.12.1 ???

Regards,

Joe Astorino
CCIE #24347 (R&S)
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Jerry Chan
Sent: Monday, June 22, 2009 4:43 AM
To: Cisco certification
Subject: Cannot form LDP peer

Hi all expert,

*I am now studying the MPLS, start to do the LDP workbook. (using GNS3)
however, it cannot form peer with a simple connection between R1--R3 using a
serial link or frame-relay.*

R1. config
=======
ip cef
mpls label protocol ldp
!
interface Serial1/3
 ip address 150.1.13.1 255.255.255.0
 mpls ip
!

R3. config
=======
ip cef
mpls label protocol ldp
!
interface Serial1/3
 ip address 150.1.13.3 255.255.255.0
 clock rate 64000
 mpls ip
!

*it can ping , can form ospf peer, but cannot form ldp peer. Am I do the
wrong things?
when i type debug mpls ldp tran even on both R1 and R3, it give me like
these.*

Rack10R1#
*Jun 22 16:22:45.203: ldp: Rcvd ldp hello; Serial1/3, from 150.1.13.3 (
150.1.13.3:0), intf_id 0, opt 0xC
*Jun 22 16:22:45.215: ldp: ldp Hello from 150.1.13.3 (150.1.13.3:0) to
224.0.0.2, opt 0xC
*Jun 22 16:22:45.215: ldp: local idb = Serial1/3, holdtime = 15000, peer
150.1.13.3 holdtime = 15000
*Jun 22 16:22:45.219: ldp: Link intvl min cnt = 2, intvl = 5000, idb =
Serial1/3
*Jun 22 16:22:45.831: ldp: Send ldp hello; Serial1/3, src/dst
150.1.13.1/224.0.0.2, inst_id 0

Rack10R3#
*Jun 22 16:19:38.887: ldp: Ignore rcvd dir hello to 150.1.13.3 from
150.1.12.1, Serial1/3; no dhcb
*Jun 22 16:19:39.519: ldp: Rcvd ldp hello; Serial1/3, from 150.1.13.1 (
150.1.12.1:0), intf_id 0, opt 0xC
*Jun 22 16:19:39.523: ldp: Send ldp hello; Serial1/3, src/dst
150.1.13.3/224.0.0.2, inst_id 0
*Jun 22 16:19:39.527: ldp: ldp Hello from 150.1.13.1 (150.1.12.1:0) to
224.0.0.2, opt 0xC
*Jun 22 16:19:39.531: ldp: local idb = Serial1/3, holdtime = 15000, peer
150.1.13.1 holdtime = 15000
*Jun 22 16:19:39.531: ldp: Link intvl min cnt = 2, intvl = 5000, idb =
Serial1/3
*Jun 22 16:19:39.535: ldp: Opening ldp conn; adj 0x6771C238, 150.1.13.3 <->
150.1.12.1; with normal priority

*please kinldy to give me some hits.

Thanks
*Jerry

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Received on Mon Jun 22 2009 - 05:35:56 ART