- Effective with Cisco IOS XE Release 2.6, Cisco IOS Release 15.0(1)S, and Cisco IOS Release 15.1(3)T, the fair-queuecommand is hidden in interface configuration mode.
- To enable weighted fair queueing (WFQ), use the fair-queue command in interface configuration or policy-map class configuration mode.
fair-queue [congestive-discard-threshold [dynamic-queues [reservable-queues]]]
no fair-queue
- congestive-discard-threshold:
- (Optional) Number of messages allowed in each queue.
- When a conversation reaches this threshold, new message packets are discarded.
- If you have hierarchical queueing framework (HQF) configured, then the values are 16 to 4096.
- dynamic-queues :
- (Optional) Number of dynamic queues used for best-effort conversations (that is, a normal conversation not requiring any special network services).
- reservable-queues
- (Optional) Number of reservable queues used for reserved conversations in the range 0 to 1000. The default is 0.
- Reservable queues are used for interfaces configured for features such as Resource Reservation Protocol (RSVP).
- Fair queueing is supported for all LAN and line (WAN) protocols except X.25, including LAPB and SDLC
- Because tunnels are software interfaces that are themselves routed over physical interfaces, fair queueing is not supported for tunnels.
- Fair queueing is on by default for interfaces with bandwidth less than or equal to 2 Mbps.
- IP Precedence, congestion in Frame Relay switching, and discard eligible (DE) flags affect the weights used for queueing.
FOR MORE INFO CISCO CMD REFFERENCE
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