binding multilink

rajivrajan1 · ‎05-21-2008

Hi friends,

I have got an issue with bundling multilink with serial.

Here comes the Topology

7206-core router is connected to multiple 1700s & 1800s through multiple E1s.

All serials are binded to multilinks at Core router and 1700 or 1800s as well.

one of the client (1700) is having issues in binding with multilink

Troubleshooting done.

Changed the encaps to hdlc at both ends

result : working fine

changed encaps to PPP with out multilink

result : working fine.

when binding to multilink :

serial and multilink goes down.

Debug output :

May 21 17:02:48.304 IST: Se2/5:30 MLP: Request add link to bundle

May 21 17:02:48.304 IST: Se2/5:30 MLP: Adding link to bundle

May 21 17:02:48.304 IST: Se2/5:30 MLP: Bundle x.x.x.x.x in different multilink group

May 21 17:02:48.304 IST: Se2/5:30 MLP: Link not added to bundle

after seeing this debug out suspected E1 & multilnik mismatch issue.

changed E1 and binded to a new multilink at both sides.

Still same issue.

The media is MLLN.

IOS c1700-k9o3sy7-mz.123-1a.bin

Please guide.

Rick Arps · ‎05-21-2008

Could you post your config?

rajivrajan1 · ‎05-23-2008

hi

there is no much complecated configuration.It's as simple as below.

Core 7200

Controller E1 3/2

framing crc4

channel group 0 time-slots 1

interface serial 3/2:0

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 1

interface multilink 1

ip address x.x.x.x x.x.x.x

ppp multilink

ppp multilink group 1

Customer

1700 - WIC2T

interface serial 0/1

no ip address

encaps ppp

ppp multilink

ppp multilink group 1

interface multilink 1

ip address x.x.x.x x.x.x.x

ppp multilink

ppp multilink group 1

circuit is a MLLN circuit.

any issues?

rajivrajan1 · ‎05-26-2008

any guidance?

shivlu jain · ‎05-26-2008

could you please change the framing

rajivrajan1 · ‎05-30-2008

hi shivlu,

tried changing but still same.

anyway thanx and i managed it somehow

Amit Singh · ‎05-26-2008

Well your config seems to fine and straightforward. This could be related to some software IOS thing. Just to narrow down the problem, try configuring the virtual-template and see if it works.

http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_example09186a0080093d69.shtml

HTH,

-amit singh

rajivrajan1 · ‎05-30-2008

thanx amit,

It looks alike IOS bug only.I changed the router (1761) with 1841 router.and it started working with same WIC 2t card.We are about to upgrade /change IOS and see. I will come back to you later

Ps :- rated you 5 ;)