[c-nsp] Problem with 7200 and 12.2(33)SRE upgrade

[Walter Keen]

Hi, I have a router I'm trying to move to a SR train, or more 
specifically 12.2(33)SRE from 12.3(15a) but I have a reports from DSL 
users of being unable to get to most places after that upgrade, which we 
reverted.

We've even setup a test router, and tried to duplicate it, with no luck 
so far.  We do have one production router with that IOS (SRE) that works 
fine.

About the only difference I can find is hardware (CPU/midplane) 
revisions and bootloader versions.

I'm starting to wonder if anyone else on this list has encountered 
similar issues.
All are NPE-G1, some with 512m ram, others with 1G ram

C7200-1 uses NAT(I know), PPP, radius, tacacs, ospf, bgp.  C7200-2 and 
-3 use the same without NAT.  We've tried replicating the config of -1 
onto -4 (the lab system) without being able to reproduce the issue.
unfortunately these are all out of a support contract

C7200-1 (with the issue):
     current IOS 12.3(15a)
     ROM: 12.3(4r)T3
     SB-1 CPU at 700MHz, Implementation 1, Rev 0.2, 512KB L2 Cache
     4 slot VXR midplane, Version 2.0
     Bootloader: 12.3(9), RELEASE SOFTWARE (fc2)
         Exhibited packet loss to ATM sub-interfaces (DSL customers) 
when moving to 12.2(33)SRE


C7200-2 (another with the issue):
     current IOS 12.4(25b)
     ROM: 12.3(4r)T3
     SB-1 CPU at 700MHz, Implementation 1025, Rev 0.2, 512KB L2 Cache
     4 slot VXR midplane, Version 2.6
     Bootloader: 12.4(12), RELEASE SOFTWARE (fc1)
         Exhibited packet loss to ATM sub-interfaces (DSL customers) 
when moving to 12.2(33)SRE

C7200-3 (working in production on SRE):
     current IOS 12.2(33)SRE
     ROM: 12.2(20030826:190624) [BLD-npeg1_rommon_r11 102], DEVELOPMENT 
SOFTWARE
     SB-1 CPU at 700MHz, Implementation 1025, Rev 0.2, 512KB L2 Cache
     4 slot VXR midplane, Version 2.11
     Bootloader: 12.4(12), RELEASE SOFTWARE (fc1)


C7200-4 (lab system, trying to replicate problem -- working on SRE):
     current IOS 12.2(33)SRE
     ROM: 12.3(4r)T1 fc1
     SB-1 CPU at 700MHz, Implementation 1025, Rev 0.2, 512KB L2 Cache
     4 slot VXR midplane, Version 2.6
     Bootloader: none listed in 'sh ver' output


-- 
Walter Keen
Network Engineer
Rainier Connect
(cell) 253-302-0194
(desk) 360-832-4024