RE: [nsp] Frame Relay question-CIR on a Cisco 2610

From: Jim Brunetti (brunetti@masergy.com)
Date: Mon Dec 17 2001 - 09:29:17 EST


Rick, I'm running Frame Relay over an IP connection. There is no Frame
Relay switch in the middle. With the MINCIR setting still work if the
"Cloud" doesn't send back any BECNs?

        -----Original Message-----
        From: Cheung, Rick [mailto:Rick.Cheung@NextelPartners.com]
        Sent: Monday, December 17, 2001 8:41 AM
        To: Jim Brunetti; cisco-nsp@puck.nether.net
        Subject: RE: [nsp] Frame Relay question-CIR on a Cisco 2610
        
        

                Jim, try using just the CIR and MINCIR values in the map
class. Set the CIR to the frame port speed of 1.536, and the Mincir to
56kbps.

        Rick Cheung
        mailto:rick.cheung@nextelpartners.com

        -----Original Message-----
        From: Jim Brunetti [ mailto:brunetti@masergy.com]
        Sent: Friday, December 14, 2001 11:12 AM
        To: cisco-nsp@puck.nether.net
        Subject: [nsp] Frame Relay question-CIR on a Cisco 2610

        I am trying to set the CIR, Bc, and Be values on a Cisco 2610.
I would
        like to set a low CIR and a high Be on a T1. When I set this on
a Cisco
        2610 running 12.2.6 with frame-relay traffic shaping (CIR of
56K, Be of
        1536000 on a 1.5 Mb link), things are hunky dory until I go past
the
        CIR. As soon I hit the CIR, the Cisco will start to queue
packets in an
        output buffer and latency goes to hell. There is no other
traffic on
        this line. Why does the Cisco ignore my Be and queue the
packets? Why
        does it take so long for a 2610 to service a queue? This
happens if I
        am running FIFO or Fair queuing. Any help would be
appreciated.

        Config snippets:

        interface Serial0/0
         no ip address
         encapsulation frame-relay IETF
         no ip mroute-cache
         no keepalive
         no fair-queue
         frame-relay traffic-shaping

        interface Serial0/0.100 point-to-point
         ip address 10.1.1.1 255.255.255.252
         frame-relay class test10
         frame-relay interface-dlci 100

        map-class frame-relay test10
         no frame-relay adaptive-shaping
         frame-relay cir 64000
         frame-relay bc 600
         frame-relay be 1536000

        ==============================
        jim brunetti brunetti@masergy.com



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