[nsp] bizarre 2950 behavior

[Sorin CONSTANTINESCU]

Do you see anything on the console port? Does it hang too?

On Thu, 15 Jul 2004 14:14:57 -0400, Matt Stockdale
<mstockda at logicworks.net> wrote:
> Hello-
> 
>  I've just brought up a new 2950 and I'm seeing the strangest behavior
> on it. Despite having a configuration essentially identical to that of
> one of the dozens of others we have in production, it is exhibiting the
> following-
> 
> 1) I can no longer telnet to it. On the occasions that it does answer,
> it does not accept any password. It just seems to display the "User
> Access Verification, Password:" prompt and then hang.
> 
> 2) I can only ping it with alternating 64 packet runs. This boggles my
> mind.
> 
> > ping a.b.c.d
> PING a.b.c.d (a.b.c.d) 56(84) bytes of data.
> 64 bytes from a.b.c.d: icmp_seq=0 ttl=253 time=6.57 ms
> 64 bytes from a.b.c.d: icmp_seq=1 ttl=253 time=1.80 ms
> 64 bytes from a.b.c.d: icmp_seq=2 ttl=253 time=1.98 ms
> .
> . (all the packets between 3 and 60 are successful)
> .
> 64 bytes from a.b.c.d: icmp_seq=61 ttl=253 time=1.77 ms
> 64 bytes from a.b.c.d: icmp_seq=62 ttl=253 time=1.78 ms
> 64 bytes from a.b.c.d: icmp_seq=63 ttl=253 time=1.79 ms
> 64 bytes from a.b.c.d: icmp_seq=128 ttl=253 time=1.78 ms
> 64 bytes from a.b.c.d: icmp_seq=129 ttl=253 time=1.92 ms
> 64 bytes from a.b.c.d: icmp_seq=130 ttl=253 time=1.61 ms
> .
> . (again, everything is ok here)
> .
> 64 bytes from a.b.c.d: icmp_seq=189 ttl=253 time=1.81 ms
> 64 bytes from a.b.c.d: icmp_seq=190 ttl=253 time=1.83 ms
> 64 bytes from a.b.c.d: icmp_seq=191 ttl=253 time=1.83 ms
> 64 bytes from a.b.c.d: icmp_seq=256 ttl=253 time=1.80 ms
> 64 bytes from a.b.c.d: icmp_seq=257 ttl=253 time=1.81 ms
> 64 bytes from a.b.c.d: icmp_seq=258 ttl=253 time=1.79 ms
> 
> 3) While the IP stack inside is clearly alive enough to listen to and
> respond to pings (and partially answer telnet), I can't ping anything
> from the device itself, even things within the same netblock.
> 
> This is actually the second 2950 I've tried to bring up in 2 days, the
> first had different but also strange behavior. Both are running
> 
> C2950-I6Q4L2-M, 12.1(13)EA1, RELEASE SOFTWARE (fc1), as shipped.
> 
> I'm totally baffled.
> 
> Has anyone seen anything like this before? am I missing something
> painfully obvious?
> 
> Thanks,
>   Matt
> 
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-- 
Sorin CONSTANTINESCU
consta at gmail.com
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