[c-nsp] VTY locks on show commands

[Vincent De Keyzer]

> I'm thinking your correct.  I can do a "sh ver |inc xyz" and it comes
> back to the prompt but if I do just a sh ver it never comes back.  I do
> not believe it's a router issue because before we cut over the circuit
> it worked just fine.
> 
> It's coming from a DS3 ATM and going to a Frame T1 at the end I'm having
> problems with.
> 
> How do I change the MTU to fix it?  The frame circuit is in a Telco's
> area I don't normally work in.

Well, you don't really have to change the MTU - you'd rather ask the telco
why you can't ping with large packets.

Normally you should get something like this:

Router#ping 172.20.2.14 size 1500 df-bit

Type escape sequence to abort.
Sending 5, 1500-byte ICMP Echos to 172.20.2.14, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/6/12 ms
Router#ping 172.20.2.14 size 1501 df-bit

Type escape sequence to abort.
Sending 5, 1501-byte ICMP Echos to 172.20.2.14, timeout is 2 seconds:
Packet sent with the DF bit set
.....
Success rate is 0 percent (0/5)

If the limit is not 1500, then something is wrong with the circuit.

Vincent

> 
> ATM side:
> 
> interface ATM4/0/0.134 point-to-point
>  bandwidth 1024
>  ip address 172.20.2.13 255.255.255.252
>  pvc 1/34
>   vbr-nrt 1024 1024
>   encapsulation aal5snap
> 
> Frame side:
> 
> Serial 0/0
> Encapsalation Frame-Relay ietf
> No ip add
> 
> Serial0/0.16 point
> Ip add 172.20.2.14 255.255.255.252
> Frame-relay interface-dlci 16
> 
> Where do I change the MTU?
> 
> Scott
> 
> -----Original Message-----
> From: Mikael Abrahamsson [mailto:swmike at swm.pp.se]
> Sent: Friday, June 29, 2007 2:06 PM
> To: Voll, Scott
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] VTY locks on show commands
> 
> On Fri, 29 Jun 2007, Voll, Scott wrote:
> 
> > I have a router I just inherited that every time I telnet to it and
> > issue a Show command it locks up.  Any idea what's causing it, and how
> > to fix it?
> 
> Does it lock up even if you do "show version | inc XYZXYZ" ? If that
> still
> works, it's probably an MTU issue.
> 
> --
> Mikael Abrahamsson    email: swmike at swm.pp.se
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