RE: [nsp] 3640 ATM to Frame Relay config?

From: Richard Brackett (
Date: Thu Jun 28 2001 - 15:52:02 EDT

Here's one that worked for me. The other end is just a straight IETF
frame-relay config. Use the abr, ubr, etc. on the pvc to indicate the pvc
setting from your provider. Also watch out for "tagging" which affects how
the qos bits are mapped into the frame fecn becn scheme. We got bit by that.
Some pvc's needed it, others didn't. Make sure to do a throughput test to
check your settings. We had some wierd latency issues.

interface ATM1/0
 no ip address
 no ip mroute-cache
 no atm ilmi-keepalive

interface ATM1/0.137 point-to-point
 description PVC to Customer
 bandwidth 128
 ip address X.X.X.1
 no ip mroute-cache
 pvc ONE37 1/37
  protocol ip X.X.X.2 broadcast
  abr 128 128
  inarp 1
  protocol ip inarp

-----Original Message-----
From: Dan Hollis []
Sent: Thursday, June 28, 2001 3:44 PM
Subject: [nsp] 3640 ATM to Frame Relay config?

Anyone have a sample config for ATM to Frame Relay?

3640:ATM - ATM:ILEC:FR - FR:3640

The 3640:ATM has NM-4T-IMA, ILEC assigned vpi/vci 4/47.
The 3640:FR has WIC-T1, ILEC assigned DLCI 17.

The ILEC is qwest.

I looked all over the cisco site for sample configs but they all appear to
be MC3810-specific configs, or configs for FR-to-ATM switching on the same
cisco, not ATM to FR over WAN on 36xx's.

The command 'encapsulation aal5mux frame-relay' that is repeatedly
referred to in cisco documentation does not seem to be available on
C3640-IS-M 12.1(6).


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