Re: [nsp] Frame Relay over STM-1

From: Clinton Work (work@scripty.com)
Date: Sun Jun 16 2002 - 15:23:54 EDT


I have run frame-relay on the Cisco 12000s using a number of different
line cards with good performance. Its well support because a number of
Tier1 service providers like to deliver Internet transit with frame-relay
encapsulation on POS interfaces.

  8-Port DS3
  4-Port OC3/STM-1 card
  4-Port OC12
  1-Port OC48

If frame-relay is going to be used over a point-to-point POS interface,
you can use something like the following:

interface posx/y
 encapsulation frame-relay IETF
 frame-relay lmi-type ansi
 frame-relay interface-dlci nnn

If required you can create multiple subinterfaces each with their on
interface-dlci command.

You can also setup the Cisco 12000 as a DCE frame-relay switch. You can mix
normal ip routing and frame-relay switching on the same 12000.

frame-relay switching
interface POS1/0
 encapsulation frame-relay IETF
 frame-relay lmi-type ansi
 frame-relay intf-type dce
 frame-relay route 100 interface POS5/0 27
 frame-relay route 129 interface POS2/0 17
 frame-relay route 130 interface POS4/0 16
 frame-relay route 135 interface POS4/0 21
 frame-relay route 136 interface POS4/0 29
 frame-relay route 193 interface POS5/0 20
 frame-relay route 202 interface POS4/0 43

The only problem I have seen are with the Engine 2 cards (4-Port OC12 and
1-Port OC-48). You have to be very careful with the features that you
enable (ACLs, sampled netflow, rate-limit, MPLS).

On Sun, Jun 16, 2002 at 06:17:26PM +0200, Blaz Zupan wrote:
> Has anybody ever run frame relay over a STM-1 POS connection on a GSR? Any
> performance problems/bugs/comments on this?
>

-- 
=========================================================================
Clinton Work                                        clinton@scripty.com
Calgary, Alberta



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