1721 restart every 10 minutes :-(

[mgtang]

Hi, I've got a very weird problem with my 1721 router (16M Flash, 32M RAM.WIC-1Enet, WIC-2T,enable NAT for Internet(go through WIC-1Enet)): It will automatically restart every 10 minutes. Here is what I've got through the console port(before it restarting). My Cisco Agency tech-support told me that this it because the RAM of my router is too small, the NAT translation needs more RAM. But when I use "show mem" to see my RAM, I still have lots of free space. The problem is caused by lack of free RAM, is it true? Thanks!

ERROR Message (what I've got through console port):

========= Dump bp = 80D426D0 ======================

80D425D0: 0 18734 0 7FC88 80D40EE0 80D3E3C0 80B2F4D0 80D4258

8

80D425F0: 0 52E5888 4270 0 0 0 0

0

80D42610: 0 0 0 0 0 0 0

0

80D42630: 0 0 0 0 C0A8024E 3DAC8E3B D888E20D D888E20

D

80D42650: 5F7 5F7 13BA 13BA 0 2 60060000

0

80D42670: 1 FFFFFFFF 80DD0680 0 0 0 0 2739

8

80D42690: 0 81650 80D3BA10 80D414A0 80B2F4D0 80D42640 0 52E725

0

80D426B0: 4270 0 0 0 0 0 0

0

80D426D0: 0 0 0 1 0 0 0

0

80D426F0: 0 0 C0A80145 3DAC8E3B D3F5F337 D3F5F337 B03 B0

3

80D42710: 1B58 1B58 0 2 60060000 1 1 FFFFFFF

F

80D42730: 80DD0680 0 80DE73B4 0 0 85A7C 0 865D

C

80D42750: 80D3F950 80D39900 80B2F4D0 80D426F8 0 52EC1DC 4270

0

80D42770: 0 0 0 0 0 0 0

0

80D42790: 0 0 0 0 0 0 0

0

80D427B0: C0A80179 3DAC8E3B D8776A81 D8776A81 A9E A9E 50 5

0

========= Dump bp->next = 0 ======================

========== Dump bp->previous = 0 =====================

============================================

%Software-forced reload

Buffered messages:

00:00:57: %SYS-5-CONFIG_I: Configured from console by console

Queued messages:

00:09:12: %SYS-3-LOGGER_FLUSHING: System pausing to ensure console debugging out

put.

00:09:10: validblock_diagnose, code = 7

00:09:10:

current memory block, bp = 0x80D426D0,

memory pool type is Processor

00:09:10: data check, ptr = 0x80D426F8

00:09:10: bp->next(0x0) not in any mempool

00:09:10: bp_prev(0xFFFFFFEC) not in any mempool

00:09:12: %SYS-3-BADBLOCK: Bad block pointer 80D426D0

-Traceback= 8019D554 8019F1D0 8071442C 8071C5D8 8071F630 807080C8 80708708 80316

658 803152F0 803154F0 8031564C 801BDC50

00:09:12: %SYS-6-MTRACE: mallocfree: addr, pc

80D426F8,80714428 80D88B6C,802296B0 80D88B6C,40000016 80DE7260,802296B0

80DE7260,40000016 80DFB4F0,803DBE5C 80DFB4F0,20000042 80D873E8,80712914

00:09:12: %SYS-6-MTRACE: mallocfree: addr, pc

80DE6290,802296B0 80DE6290,40000016 80DE698C,803DBE5C 80DE698C,20000042

80DE7A44,802296B0 80DE7A44,40000016 80E020AC,802296B0 80E020AC,40000016

00:09:12: %SYS-6-BLKINFO: Freespace does not end at end of the pool blk 80D426D0

, words 0, alloc 0, Free, dealloc 3DAC8E3B, rfcnt 0

-Traceback= 8019AE04 8019D564 8019F1D0 8071442C 8071C5D8 8071F630 807080C8 80708

708 80316658 803152F0 803154F0 8031564C 801BDC50

00:09:12: %SYS-6-MEMDUMP: 0x80D426D0: 0x0 0x0 0x0 0x1

00:09:12: %SYS-6-MEMDUMP: 0x80D426E0: 0x0 0x0 0x0 0x0

00:09:12: %SYS-6-MEMDUMP: 0x80D426F0: 0x0 0x0 0x0 0x0

=== Flushing messages (00:09:13 UTC Mon Mar 1 1993) ===

Buffered messages:

00:00:57: %SYS-5-CONFIG_I: Configured from console by console

Queued messages:

00:09:60129542143: %SYS-3-LOGGER_FLUSHING: System pausing to ensure console debu

gging output.

00:09:13: %SYS-3-LOGGER_FLUSHED: System was paused for 00:00:01 to ensure consol

e debugging output.

Free space check for flash:crashinfo_19930301-000913 failed (-1/8050)

*** System received a SIGTRAP exception ***

signal= 0x5, code= 0x700, context= 0x80aed318

PC = 0x801b77f8, Vector = 0x700, SP = 0x80c66f88

[deilert]

This could be true , you are getting malloc errors , this could be because of a lack of memory. It could also be the box has a memory leak , this happens when the box has a process that is using memory , when that process is finished it should release and free up the memory , however it does not release it , eventually the router runs out of memory.

%Software-forced reload ' listed

This is a software bug . You can see this by the ' You can try upgrading or downgrading your code to see if it corrects the problem .

[mgtang]

Deilert, thank you very much for your reply. If I only upgrade the RAM, will it resolve my problem (if I do not upgrade IOS)?

[deilert]

hard to say , I would do which ever is easier for you first . If that fixes the problem then disregard the other . If it does not fix your problem then upgrade or replace RAM

[mgtang]

Thanks! I'll try.

[sachin]

Sometime router gets restart intermittently because of MS-Blaster Worm.Do apply access-list as recommanded by cisco.block port

! −−− block TFTP

access−list 115 deny udp any any eq 69

! −−− block W32.Blaster related protocols

access−list 115 deny tcp any any eq 135

access−list 115 deny udp any any eq 135

! −−− block other vulnerable MS protocols

access−list 115 deny udp any any eq 137

access−list 115 deny udp any any eq 138

access−list 115 deny tcp any any eq 139

access−list 115 deny udp any any eq 139

access−list 115 deny tcp any any eq 445

access−list 115 deny tcp any any eq 593

! −−− block remote access due to W32.Blaster

access−list 115 deny tcp any any eq 4444

! −−− Allow all other traffic −− insert

! −−− other existing access−list entries here

access−list 115 permit ip any any

interface

ip access−group 115 in

ip access−group 115 out

HTH,

Sachin

[mgtang]

sachin@infotecindia.com, thanks for your reply. I can assure that there is no virus because I have already applied these access-list before and I also have NAV Corporate Edition in my network.

[mgtang]

I've already upgrade my RAM to 96MB, but after 24 hours I met with the same problem. What can I do now? Upgrade the IOS? Any suggestions will be appreciate. Thanks!

[mgtang]

Is there anyone can help me?

[mgtang]

I've already upgraded my IOS, now the problem happened not very often, but after 3 days I got forced restarting again, here is the error message line in the "show version". Is there anyboday can help me? Thanks!

System returned to ROM by error - a SegV exception, PC 0x80073274