All Cisco-Network Study Notes: Configuring PQ CQ for Frame Relay

Configuring PQ CQ for Frame Relay

Configuring PQ & CQ for Frame Relay

Priority queuing for Frame Relay is configured using these steps:

STEP 1.	Enable Frame Relay Traffic Shaping.
STEP 2.	Select interesting traffic.
STEP 3.	Create a priority list and custom queue list.
STEP 4.	Create a map class to call the priority list and/or custom queue list.

STEP 5.	Apply the map class to a Frame Relay interface.

Step 1: Enable Frame Relay Traffic Shaping

`Router(config)#` `interface serial0/0`	Moves to interface configuration mode.
`Router(config-if)#` `frame-relay traffic-shaping`	Configures a Frame Relay map class.

Step 2: Select Interesting Traffic

`Router(config)#` `access-list 10 permit ip 192.168.100.32 0.0.0.3`	Chooses source addresses for high priority handling.

Step 3: Create a Priority List and Custom Queue List

`Router(config)#` `priority-list 5 protocol ip high list 10`	Assigns an access list to specify traffic to the "high" priority queue.
`Router(config)#` `priority-list 5 protocol ip medium tcp 23`	Assigns TCP port 23 traffic to the "medium" priority queue.
`Router(config)#` `priority-list 5 protocol ip normal tcp 123`	Assigns TCP port 123 traffic to the "normal" priority queue.
`Router(config)#` `priority-list 5 default low`	Defines a default queue for traffic not specified in another queue.
`Router(config)#` `priority-list 5 queue-limit 20 40 60 100`	Specifies the maximum number of packets for each queue.
`Router(config)#` `queue-list 7 protocol ip 3 udp 6000`	Assigns UDP port 6000 packets to queue number 7.

Step 4: Create a Map Class to Call the Priority List and/or Custom Queue List

`Router(config)#` `map-class frame-relay PRIORITY`	Creates and names a map class.
	NOTE: A map class in Frame Relay should not be confused with a class-map.
`Router(config-map-class)#` `frame-relay priority-group 5`	Assigns priority list 5 programming to map class PRIORITY.
`Router(config-map-class)#` `frame-relay custom-queue-list 7`	Assigns custom queue list 7 programming to map class PRIORITY.
`Router(config-map-class)#` `frame-relay bc 10000`	Specifies committed burst size (bc); Default = 56,000 bits
`Router(config-map-class)#` `frame-relay be 5000`	Specifies excess burst size (Be), Default = 0 bits
`Router(config-map-class)#` `frame-relay cir 64000`	Specifies Committed Information Rate (CIR), Default = 56,000 bps
`Router(config-map-class)#` `frame-relay traffic-rate 64000 96000`	Specifies the average and peak traffic rates.
`Router(config-map-class)#` `exit`	Exits map class mode.

Note

The frame-relay priority-group command specifies legacy Cisco IOS priority queuing.

Step 5: Apply the Map Class to a Frame Relay Interface

`Router(config)#` `interface serial0/0.100`	Enters configure interface mode.
`Router(configif)#` `framerelay interface-dlci 100`	Assigns interface DLCI.
`Router(config-fr-dlci)#` `class PRIORITY`	Assigns the class to the virtual circuit (VC).