Frame-Relay and QoS Questions

From: Osterberg, Todd \(EM, ITS\) (Todd.Osterberg@ge.com)
Date: Fri May 21 2004 - 18:38:37 GMT-3

I have some questions for the group...

Remote site has a single frame-relay t1 with 2 pvcs. Primary PVC has a
CIR of 256K but can burst to full AR. The backup PVC is 4K but can
burst to full AR. With the contact we have with the Telco, out packets
never get marked DE, we are not charged more if we send traffic at
double the CIR. We will be running video conferencing and multicast
audio (16K) and multicast video (56K) sessions across the WAN. Here is
the sample config for a remote site with a 256K CIR (see below). So
here are my questions:

1. What are the thoughts/comments on the CIR/MINCIR/Be/Bc values.
2. What would you tweak these values to be if the CIR was 512K?
3. Is there any interaction between the interface bandwidth command
and the FRTS map-class values?

The configuration at the head end will be similar except that it will be
ATM plus we will be providing a class-map for multicast traffic.

Any other thoughts or comments would be appreciated.

Thanks,

Todd Allen Osterberg
GE IT Solutions
Cisco Content Networking Specialist

class-map match-any video-conference
  match access-group 102
  match ip dscp af41

policy-map QoS-Policy
  class video-conference
    priority 450 30000
    set ip dscp af41
  class class-default
   fair-queue
   random-detect dscp-based

access-list 102 permit ip host x.x.x.x any << ip address of the h.323
end point >>

interface serial0/0
            encapsulation frame-relay
            no ip address
            desc physical interface <<<circuit id>>> etc
            frame-relay traffic-shaping

interface serial0/0.16
            desc primary PVC CIR=256k, burst to 1500K
            frame-relay interface-dlci 16
              class 256k-frts
            ip address 10.1.1.1 255.255.255.0
            bandwidth 256

interface serial0/0.26
            desc backup pvc CIR=4K, burst to 1500K
            frame-relay interface dlci 26
              class 256k-frts
            ip address 10.2.2.1 255.255.255.0
            bandwidth 4

map-class frame-relay 256k-frts
            service-policy output QoS-Policy
            frame-relay mincir 256000
            frame-relay cir 512000
            frame-relay bc 1000000
            frame-relay be 30000

router eigrp 42
            network 10.0.0.0

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