Re: 4506 switch behaving strange

From: Ajay V m (ajayvm@gmail.com)
Date: Fri Feb 16 2007 - 01:48:11 ART

Hi Pradeep,

This Happens on Random PCs connected to various ports in the switch.I have
cheked for the port status when the actual error is happening

the show interface

FastEthernet5/3 is up, line protocol is up (connected)
  Hardware is Fast Ethernet Port, address is 0013.1906.2962 (bia
0013.1906.2962)
  Description: **** Suspected port ***
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, link type is auto, media type is 10/100BaseTX
  input flow-control is unsupported output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 02:33:31
  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 38000 bits/sec, 45 packets/sec
     20901 packets input, 1983466 bytes, 0 no buffer
     Received 75 broadcasts (32 multicast)
     11 runts, 0 giants, 0 throttles
     176 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     343810 packets output, 39866937 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

showing no errors.The PC wil not be reacable from the switch also during the
period when the gateway is not reachable from the switch.

Thanks And Regads

Ajay

On 2/16/07, Pradeep Varadarajan <veedott.pradeep@gmail.com> wrote:
>
> Check the timeout or aging out periods in the adjacency table or the FIB
> table. Maybe the ARP broadcast is not happening from the PC for a certain
> period, during which the Switch either is not able to build the adjacency
> table or the existing entry is aged out. Is there any specific PC...on a
> specific port that seems to have a problem or does this happen at random ?
> Check for packet drops either on these specific ports or globally on the
> switch, log it and verify the "timeperiod match" with non-availability of
> gateway.
>
> Pradeep
>
>
> On 2/16/07, Ajay V m <ajayvm@gmail.com> wrote:
>
> > Hi,
> >
> >
> > In my catalyst 4506 switch some of the users loose their connectivity to
> > the
> > gateway in their pc for a certain period.If the ip is renwed in pc or
> > the
> > port is reseted in the switch then the pc will regain the reachabilty to
> > the
> > gateway.The lan connection is always showing connected even when it
> > looses
> > the reacability to gateway.The switching is running IOS 12.2(25)EWA7.I'm
> > not
> > seeing any loggs on switch also.
> >
> > --
> > Regards
> >
> > Ajay
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
>
> 

-- 
Regards

Ajay

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