Re: [nsp] line protocol down/up error mesgs

From: Stephen Balbach (stephen@clark.net)
Date: Fri Dec 12 1997 - 20:02:30 EST


There is recorded this:

        3 carrier transitions

full sh int:

  MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec, rely 255/255, load 4/255
  Encapsulation HDLC, loopback not set, keepalive set (10 sec)
  Last input 00:00:00, output 00:00:02, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0 (size/max/drops); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/64/0 (size/threshold/drops)
     Conversations 0/18 (active/max active)
     Reserved Conversations 0/0 (allocated/max allocated)
  5 minute input rate 100000 bits/sec, 22 packets/sec
  5 minute output rate 27000 bits/sec, 14 packets/sec
     4733911 packets input, 2193128614 bytes, 0 no buffer
     Received 18210 broadcasts, 0 runts, 0 giants
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 3 abort
     10236341 packets output, 2891963796 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 289806 output buffers swapped out
->> 3 carrier transitions
     RTS up, CTS up, DTR up, DCD up, DSR up

Whats a "carrier transition" ?

On Fri, 12 Dec 1997, Luke Parrish wrote:

> when you do a 'sh int s2/5', are you seeing any interface resets?
>
>
> At 04:16 PM 12/12/97 -0500, you wrote:
> >
> >Seeing a lot of line protocol bounces on T1's in log files:
> >
> >For example:
> >
> >Dec 10 02:48:27 e1-1.baltimore.mae-east.clark.net 111498:
> >%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/5, changed state
> >to down
> >Dec 10 02:48:27 e1-1.baltimore.mae-east.clark.net 111499:
> >%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/5, changed state
> >to up
> >
> >
> >
> >
> >Bounces up and down in < 1 second - logs only show it for one end of the
> >T1 not the other.
> >
> >Not sure if this is real, false positives, etc..
> >
> >Anyone seen this before?
> >
> > Stb
> >
> >
> >
> >
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