Multilink Group Locking Up

[RadioX]

I have a multilink group that just randomly locks up and cannot figure it out to save my life. Each T1 belonging to the multilink shows up/up
The multilink itself shows up/up it just will not pass traffic

A show interface shows LCP open and multilink open. Here is a sample of the config

interface MultilinkX
ip address xx.xxx.xx.xxx 255.255.255.252
ppp multilink
no ppp multilink fragmentation
multilink-group X

interface Serial5/0/1:0
description
bandwidth 1544
no ip address
encapsulation ppp
tx-queue-limit 26
down-when-looped
ppp multilink
multilink-group X


IOS is 12.2(15) Any tips/suggestions would be greatly appreciated. This just started happening so I am stumped

Thanks

 

[JOAMON]

Does this router connect to another device\firewall? If so what make and model. Also what model is this router and how much flash and ram is in it?

 

[RadioX]

The about router is a cisco 7507 with 256mb ram

The router it connects to is:
Cisco 7206
12.2(15) IOS
256mb ram

interface MultilinkX
ip address xx.xxx.xx.xxx 255.255.255.252
no cdp enable
ppp multilink
no ppp multilink fragmentation
multilink-group X

interface Serial1/0:0
no ip address
encapsulation ppp
down-when-looped
no fair-queue
no cdp enable
ppp multilink
multilink-group X

Thanks

 

[jneiberger]

Is this 12.2(15) or 12.2(15)T?

 

[jneiberger]

I just took a look on Bug Tracker. There are 60 bugs related to PPP multilink in 12.2(15), and there are 28 in 12.2(15)T. In addition, there are a lot more bugs related to PPP, in general, that don't specifically relate to PPP multilink. I would recommend upgrading to the latest release in the train you're using.

For example, if you're using 12.2(15) then you should upgrade to 12.2(34a). If you're using the T train then you could try 12.2(15)T17. Better yet, if you're using the T train you should upgrade to the latest mainline release of 12.3, which is currently 12.3(19).