Cisco 2951 router issues

[roncro]

Hello,   I have a Cisco 2951 router I use at home,  and I suspect it to give me some issues.

The internet (via a cisco cable modem)  drops the conenction (status says there is no traffic)  and the connection drops

I checked the router and I see log messages saying:

Oct 12 01:09:41.068: %IP_VFR-3-COALESCE_ERROR: Unable to coalesce fragments arriving through GigabitEthernet0/0 - datagram 4121 bytes is too big. UDP packet 75.75.75.75:53 -> A.B.C.D:59499 has ident: 50999 flags:0x0 and 3 fragments

At first I thought it was the modem, or the cable connection,  but now I am not sure.  The problem seems to be intermittent and comes in "waves".

(The 75.75.75.75 is a comcast dns server)

Also,  when the  internet connection drops,  the router seems to become unresponsive (can't ping it,  if logged it it drops the session)

any ideas?

Thanks,

Ron

[roncro]

I tried following the instructions.

The router/2951 doesn't know

sh bootvar

(it doesn't recognize 

bootvar

)   can I just skip it and proceed from the conf t(erminal) on?  (also, flash doesn't exist,  but flash0:  (dir flash doesn't work,  dir flash0  does)

thanks,

Ron

[roncro]

Hello Paul,

the

show bootvar

the 2951 doesn't seen to recognize

bootvar

Could I just skip it?  and continue ?   Also   I think it doesn't recognize 'flash'  it's called flash0 on mine  (dir flash doesn't work,  dir flash0 does work.

Also with the

boot system

calls,  why do I need to use both the new and the old one in the call?

boot system flash:xxxnNEWxx.bin
boot system flash:xxxnOLDxx.bin  ?

Shouldn't I just use the new one?

thanks!

Ron

[roncro]

Also, the newest one doesn't look like it will fit,  not enough room?

this is what is on there:

1 -rw- 66547544 May 28 2012 04:30:02 -06:00 c2951-universalk9-mz.SPA.151-4.M4.bin
2 -rw- 2814 May 28 2012 04:37:14 -06:00 cpconfig-29xx.cfg
3 -rw- 3000320 May 28 2012 04:37:28 -06:00 cpexpress.tar
4 -rw- 1038 May 28 2012 04:37:36 -06:00 home.shtml
5 -rw- 122880 May 28 2012 04:37:46 -06:00 home.tar
6 -rw- 1697952 May 28 2012 04:37:58 -06:00 securedesktop-ios-3.1.1.45-k9.pkg
7 -rw- 415956 May 28 2012 04:38:08 -06:00 sslclient-win-1.1.4.176.pkg
8 -rw- 1142 Jul 24 2012 07:07:52 -06:00 FCZ1622702R_20120724014232364.lic
9 -rw- 97911952 Oct 28 2015 06:44:34 -06:00 c2951-universalk9-mz.SPA.154-1.T1.bin




show version  shows me the running version:

System image file is "flash0:c2951-universalk9-mz.SPA.151-4.M4.bin"

so there are things I don't need (I think), looks like I don't need

cpexpress.tar, home.tar (and do I need securedeskop-ios or sslclient-win

and there's a c2951-universalk9-mz that's newer then what's running?

thanks,

Ron

[roncro]

btw:   trying to back stuff up on the tftp server, but get some weird errors.

Charon-2951#copy flash0:c2951-universalk9-mz.SPA.154-1.T1.bin tftp

Address or name of remote host []? 192.168.2.8

Destination filename [c2951-universalk9-mz.SPA.154-1.T1.bin]?

%Error opening tftp://192.168.2.8/c2951-universalk9-mz.SPA.154-1.T1.bin (No such file or directory)

I guess I am doing something wrong

Ron

[roncro]

Update:

I adapted the commands, with wat I saw on my router,  that seemed to work.  So I have the newerish IOS running now.  (I am wondering still,  if I can save the old image to my ftp server to save it?)  Just in case.

If I delete the oldest IOS,  and put the new one

(c2951-universalk9-mz.SPA.156-3.M9.bin)

on it I'd have 4Mb left or so, is that a good idea?

thanks,

Ron

[paul driver · Accepted solution]

Hello

---

@roncro wrote:

If I delete the oldest IOS,  and put the new one

 (c2951-universalk9-mz.SPA.156-3.M9.bin)

on it I'd have 4Mb left or so, is that a good idea?

---

Yes, if you have the new ios on now and you dont have much space remove the old one, also the cpexpress tar  file if you dont use it?.

delete flash0:c2951-universalk9-mz.SPA.151-4.M4.bin
delete flash0:cpexpress.tar 

---

@roncro wrote:

%Error opening tftp://192.168.2.8/c2951-universalk9-mz.SPA.154-1.T1.bin 

(No such file or directory)
I guess I am doing something wrong

---

copy flash0:c2951-universalk9-mz.SPA.154-1.T1.bin tftp: <--colon

[roncro]

Hi Paul,

cool,  I'll do that.

The

copy flash0:c2951-universalk9-mz.SPA.154-1.T1.bin tftp: 

still gives me the same error 

%Error opening tftp://192.168.2.8/IOS/c2951-universalk9-mz.SPA.154-1.T1.bin

(No such file or directory)

And of course it isn't there,  because I want to move it from the router,  to the ftp server , as a backup.

Is it possible to copy a single file from the router to  an tftp server?

(I'd rather back it up before I delete it)

thansk,

Ron

Ron

[roncro]

I think I got it;

Charon-2951 uptime is 8 minutes
System returned to ROM by reload at 20:10:37 MDT Fri Oct 13 2023
System restarted at 20:13:13 MDT Fri Oct 13 2023
System image file is "flash0:c2951-universalk9-mz.SPA.156-3.M9.bin"
Last reload type: Normal Reload
Last reload reason: Reload Command

Charon-2951#dir
Directory of flash0:/

1 -rw- 115438536 Oct 13 2023 20:05:16 -06:00 c2951-universalk9-mz.SPA.156-3.M9.bin
2 -rw- 2814 May 28 2012 04:37:14 -06:00 cpconfig-29xx.cfg
3 -rw- 1038 May 28 2012 04:37:36 -06:00 home.shtml
4 -rw- 122880 May 28 2012 04:37:46 -06:00 home.tar
5 -rw- 1697952 May 28 2012 04:37:58 -06:00 securedesktop-ios-3.1.1.45-k9.pkg
6 -rw- 415956 May 28 2012 04:38:08 -06:00 sslclient-win-1.1.4.176.pkg
7 -rw- 1142 Jul 24 2012 07:07:52 -06:00 FCZ1622702R_20120724014232364.lic
8 -rw- 97911952 Oct 28 2015 06:44:34 -06:00 c2951-universalk9-mz.SPA.154-1.T1.bin

256507904 bytes total (40898560 bytes free)

looks right,  doesn't t?

I hope it solves my problem,  with that coalescent/rom error.

Ron

PS;  the tftp error was a  configuration error on the tftp server,  it only allowed reading,  the -c option (allow it to create files) solved that part.