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Re: Flapping POS Interface on Frame-relay between a Juniper and Cisco
From: Jay Hennigan <jay () west net>
Date: Mon, 05 Dec 2011 16:39:55 -0800

On 11/19/11 8:11 AM, Righa Shake wrote:

Am having a problem that is buffling.

I recently changed a POS link encapsulation from PPP to Frame-relay.
Since that time the POS interface keeps resetting from time to time.

On my BGP session am receiving cease notifications from my upstream

The setup is such that we have a cisco on one end and a Juniper on the

interface POS0/0/0
 mtu 4474

Does this match the other end?

 no ip address
 no ip unreachables
 encapsulation frame-relay

You might try "encapsulation frame-relay ietf"  for full compatibility
with non-Cisco gear at the other end.

 logging event link-status
 crc 32
 pos scramble-atm
 frame-relay lmi-type ansi

ROUTERshow run int pos0/0/0.101
Building configuration...

interface POS0/0/0.101 point-to-point

  LMI enq sent  81981, LMI stat recvd 77480, LMI upd recvd 0, DTE LMI up
                  ^^^^^                 ^^^^^
Something is dropping frames.


  Last clearing of "show interface" counters 1w2d


     6970870 runts, 2179 giants, 0 throttles
              0 parity
     892493293 input errors, 882184781 CRC, 0 frame, 0 overrun, 0 ignored,
3335463 abort

Lots of CRC line errors, runts, giants, LMI dropped frames.  Kind of
looks like you could have a physical problem with the link itself.

Jay Hennigan - CCIE #7880 - Network Engineering - jay () impulse net
Impulse Internet Service  -  http://www.impulse.net/
Your local telephone and internet company - 805 884-6323 - WB6RDV

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