园区网QoS设计.ppt

96 ? 2005 Cisco Systems, Inc. All rights reserved. Cisco Confidential RST-2501 Cisco Catalyst 6500 QoS 设计 排队设计 (1P2Q2T Cisco Catalyst OS) CAT6500-PFC2-CATOS (enable) set qos txq-ratio 1p2q2t 40 30 30 ! Allocates buffers: 40% for Q1, 30% for Q2, 30% for Q3 (PQ) CAT6500-PFC2-CATOS (enable) set qos wrr 1p2q2t 30 70 ! Sets the WRR weights for 30:70 (Q1:Q2) bandwidth servicing CAT6500-PFC2-CATOS (enable) set qos wred 1p2q2t tx queue 1 40:80 80:100 40:80 to limit Scavenger/Bulk within Q1 80:100 for congestion-avoidance for Best Effort set qos wred 1p2q2t tx queue 2 70:80 80:100 70:80 to provide congestion-avoidance 80:100 to force room for Network Control traffic CAT6500-PFC2-CATOS (enable) ! Sets Q1 WRED T1 to ! Sets Q1 WRED T2 to CAT6500-PFC2-CATOS (enable) ! Sets Q2 WRED T1 to ! Sets Q2 WRED T2 to CAT6500-PFC2-CATOS (enable) cos 1 cos 0 cos 2,3,4 cos 6,7 Threshold 2 cos 5 CAT6500-PFC2-CATOS (enable) set qos map 1p2q2t tx 1 1 ! Maps Scavenger/Bulk to Q1 WRED Threshold 1 CAT6500-PFC2-CATOS (enable) set qos map 1p2q2t tx 1 2 ! Maps Best Effort to Q1 WRED Threshold 2 CAT6500-PFC2-CATOS (enable) set qos map 1p2q2t tx 2 1 ! Maps CoS 2,3,4 to Q2 WRED Threshold 1 CAT6500-PFC2-CATOS (enable) set qos map 1p2q2t tx 2 2 ! Maps Network/Internetwork Control to Q2 WRED CAT6500-PFC2-CATOS (enable) set qos map 1p2q2t tx 3 1 ! Maps VoIP to PQ CAT6500-PFC2-CATOS (enable) 97 ? 2005 Cisco Systems, Inc. All rights reserved. Cisco Confidential RST-2501 Cisco Catalyst 6500 QoS 设计 排队设计 (1P2Q2T: Cisco IOS): Part 1 CAT6500-PFC3-IOS(config)#interface range GigabitEthernet4/1 - 8 CAT6500-PFC3(config-if-range)# wrr-queue queue-limit 40 30 ! Sets the buffer allocations to 40% for Q1 and 30% for Q2 ! Indirectly sets PQ (Q3) size to equal Q2 (which is set to 30%) CAT6500-PFC3(config-if-range)# wrr-queue bandwidth 30 70 ! Sets the WRR weights for 30:70 (Q1:Q2) bandwidth servicing CAT6500-PFC3(config-if-range)# CAT6500-PFC3(config-if-range)# wrr-queue random-dete