Map Class usage

[rcasta]

Being sort of new using Frame Relay, I would like to know what difference does it make whether I use a map-class or set parameters (for instance applying a policy map)directly on an interface?

For instance:

map-class frame-relay map1
service-policy output dosomething
no frame-relay adaptive-shaping
!
(then applying it on an interface)

and on the other hand:

interface ser0/0
service-policy output dosomething
...

 

[Jynxx]

Here is an example of what we use to prioritize pre-marked (we mark at the switches...the edge) VoIP and video traffic as well as to limit bandwidth of server backup traffic during business hours. This shows why you would want to use both, as well as an example of how they work together.
===========================================================

class-map match-all Video-Conference-Traffic
match dscp cs6
class-map match-all VoIP-Traffic
match dscp cs7
class-map match-all Server-Backup-Traffic
match access-group name Server-Backup-Traffic
!
policy-map wan-qos
class VoIP-Traffic
priority 32
class Video-Conference-Traffic
bandwidth 420
class Server-Backup-Traffic
police cir 128000
class class-default
fair-queue
!
interface Serial0/0
bandwidth 768000
no ip address
encapsulation frame-relay IETF
no fair-queue
service-module t1 timeslots 1-12
frame-relay traffic-shaping
frame-relay lmi-type ansi
!
interface Serial0/0.100 point-to-point
description Frame Relay
ip address 10.10.10.1 255.255.255.252
no ip proxy-arp
frame-relay interface-dlci 100
class 768k
!
ip access-list extended Server-Backup-Traffic
permit tcp any any eq 1500 time-range Business-Hours
!
map-class frame-relay 768k
frame-relay adaptive-shaping becn
frame-relay adaptive-shaping interface-congestion 20
frame-relay cir 768000
frame-relay be 0
frame-relay mincir 729600
service-policy output wan-qos
!
time-range Business-Hours
periodic weekdays 6:00 to 17:00

 

[johnbigbubba]

Hey Jynxx,

I have a question for you... Have you ever supported a multi-point to point frame which asymetrical accesses.

Homed end is a 1.536 and the remotes are various, 56k, 128k, 256k, and 512k.

Example

Homed End
=========

interface Serial1/0
bandwidth 1544
ip address 10.1.1.1 255.255.255.0
no ip redirects
encapsulation frame-relay
ip split-horizon
fair-queue 300 256 0
frame-relay map ip 10.1.1.2 200 broadcast
frame-relay map ip 10.1.1.3 203 broadcast
frame-relay map ip 10.1.1.4 201 broadcast
frame-relay map ip 10.1.1.5 204 broadcast
frame-relay map ip 10.1.1.6 135 broadcast
frame-relay lmi-type ansi
frame-relay broadcast-queue 1700 170000 250
hold-queue 1000 out

Site A
======

interface Serial0
bandwidth 56
ip address 10.1.1.2 255.255.255.0
no ip redirects
encapsulation frame-relay
ip split-horizon
fair-queue 300 256 0
frame-relay map ip 10.1.1.1 100 broadcast
frame-relay lmi-type ansi

Site B
======

interface Serial1
bandwidth 128
ip address 10.1.1.3 255.255.255.0
no ip redirects
encapsulation frame-relay
ip split-horizon
fair-queue 300 256 0
frame-relay map ip 10.1.1.1 100 broadcast
frame-relay lmi-type ansi

etc...

How would you assign shaping to this? Would you break apart the "multi-point" at the homed end and use multiple "point-to-point" sub interfaces and then assign a mapping accordingly?