QOS - FRTS priority queue

Priority queueing can also be applied on a per VC basis. Configuration of the priority queues and flows is done in the standard manner.

access-list 150 permit tcp any any eq www
access-list 151 permit udp any any eq tftp
access-list 152 permit tcp any any eq cmd

priority-list 1 protocol ip high list 151
priority-list 1 protocol ip medium list 150
priority-list 1 protocol ip normal list 152
priority-list 1 default low

To apply the priority queueing this is NOT done under the interface. Without thinking i tried this and received the following error.

Router_5(config)#int s2/0
Router_5(config-if)#priority-group 1
Cannot change interface queuing when Frame-Relay traffic-shapi
ng is configured

For per VC priority queueing the priority queue must be applied to the map class used by the VC.

map-class DLCI_503
frame-relay priority-group 1

This can then be verified using the show traffic-shape queue command and the show frame pvc 503 commands.



Router_5#show traffic-shape queue
Traffic queued in shaping queue on Serial2/0 dlci 501
Queueing strategy: fcfs
Traffic queued in shaping queue on Serial2/0 dlci 504
Queueing strategy: fcfs
Traffic queued in shaping queue on Serial2/0 dlci 503
Queueing strategy: priority-group 1
Traffic queued in shaping queue on Serial2/0 dlci 502
Queueing strategy: fcfs



Router_5#show frame-relay pvc 503

PVC Statistics for interface Serial2/0 (Frame Relay DTE)

DLCI = 503, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial2/

input pkts 71 output pkts 68 in bytes 6372
out bytes 6608 dropped pkts 0 in pkts dropped 0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 0 out bcast bytes 0
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 00:30:32, last time pvc status changed 00:28:53
cir 256000 bc 2560 be 0 byte limit 320 interval 10
mincir 128000 byte increment 320 Adaptive Shaping none
pkts 43 bytes 3952 pkts delayed 0 bytes delayed 0
shaping inactive
traffic shaping drops 0
Queueing strategy: priority-list 1

List Queue Args
1 low default

List Queue Args
1 high protocol ip list 151
1 medium protocol ip list 150
1 normal protocol ip list 152
Output queue: high 0/20/0, medium 0/40/0, normal 0/60/0, low 0/80/0