[c-nsp] ATM multilink issue

[Adam Greene]

Hi,

I am troubleshooting an ATM multilink issue.

The first (3) ATM lines I add to the bundle work great. I add a fourth line, 
and performance degrades horribly.

I'm working with a 3640, 128MB RAM, 12.3(26), with the following cards:

- NM-0FE2W: (2) PA-1C-P
- NM-2FE2W: (2) PA-1C-P

(there's also a NM-1E2W with (2) WIC-1DSU-T1's in the unit)

I can bundle the (2) ATM lines from the NM-0FE2W and (1) from the NM-2FE2W 
just fine, but when I add the second line from the NM-2FE2W, performance is 
terrible.

A "debug multilink events" shows that upon adding the fourth line, the 
following starts happening:

*Jun  24 18:30:43.944 edt: Mu1 MLP: Begin bit lost, discard fragment 15F75B
*Jun  24 18:30:43.944 edt: Mu1 MLP: Begin bit lost, discard fragment 15F75C
*Jun  24 18:30:43.944 edt: Mu1 MLP: Begin bit lost, discard fragment 15F75D
*Jun  24 18:30:43.976 edt: Mu1 MLP: Received lost fragment seq 15F756, 
expecting 15F7FE
*Jun  24 18:30:43.980 edt: Mu1 MLP: Received lost fragment seq 15F75A, 
expecting 15F7FE
*Jun  24 18:30:43.980 edt: Mu1 MLP: Received lost fragment seq 15F75E, 
expecting 15F7FE
*Jun  24 18:30:43.984 edt: Mu1 MLP: Lost fragment 15F7FE (all links out of 
sequence)

Could I just have a bad line from Verizon? Or a bad card? Or have I hit some 
hardware limit on the 3640?


Thanks
Adam