Enterprise QoS Solution Reference Network Design Guide

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Catalyst 3550—QoS Considerations and Design 2-40 Enterprise QoS Solution Reference Network Design Guide Chapter 2 Campus QoS Design CAT3550(config-pmap)#class VVLAN-VOICE CAT3550(config-pmap-c)# set ip dscp 46 ! DSCP EF (Voice) CAT3550(config-pmap-c)# police 128000 8000 exceed-action drop ! Only one voice call is permitted per switchport VVLAN CAT3550(config-pmap-c)#class VVLAN-CALL-SIGNALING CAT3550(config-pmap-c)# set ip dscp 24 ! DSCP CS3 (Call-Signaling) CAT3550(config-pmap-c)# police 32000 8000 exceed-action policed-dscp-transmit ! Out-of-profile call signaling is marked down to Scavenger (CS1) CAT3550(config-pmap-c)#class VVLAN-ANY CAT3550(config-pmap-c)# set ip dscp 0 CAT3550(config-pmap-c)# police 32000 8000 exceed-action policed-dscp-transmit ! Unauthorized VVLAN traffic is marked down to Scavenger (CS1) CAT3550(config-pmap-c)#class DVLAN-PC-VIDEO CAT3550(config-pmap-c)# set ip dscp 34 ! DSCP AF41 (Interactive-Video) CAT3550(config-pmap-c)# police 500000 8000 exceed-action policed-dscp-transmit ! Only one IP/VC stream will be permitted per switchport CAT3550(config-pmap-c)#class DVLAN-MISSION-CRITICAL-DATA CAT3550(config-pmap-c)# set ip dscp 25 ! Interim Mission-Critical Data CAT3550(config-pmap-c)# police 5000000 8000 exceed-action policed-dscp-transmit ! Out-of-profile Mission-Critical Data is marked down to Scavenger (CS1) CAT3550(config-pmap-c)#class DVLAN-TRANSACTIONAL-DATA CAT3550(config-pmap-c)# set ip dscp 18 ! DSCP AF21 (Transactional Data) CAT3550(config-pmap-c)# police 5000000 8000 exceed-action policed-dscp-transmit ! Out-of-profile Transactional Data is marked down to Scavenger (CS1) CAT3550(config-pmap-c)#class DVLAN-BULK-DATA CAT3550(config-pmap-c)# set ip dscp 10 ! DSCP AF11 (Bulk Data) CAT3550(config-pmap-c)# police 5000000 8000 exceed-action policed-dscp-transmit ! Out-of-profile Bulk Data is marked down to Scavenger (CS1) CAT3550(config-pmap-c)#class DVLAN-ANY CAT3550(config-pmap-c)# set ip dscp 0 CAT3550(config-pmap-c)# police 5000000 8000 exceed-action policed-dscp-transmit ! Out-of-profile data traffic is marked down to Scavenger (CS1) CAT3550(config-pmap-c)# exit CAT3550(config-pmap)#exit CAT3550(config)# CAT3550(config)#interface FastEthernet0/1 CAT3550(config-if)# switchport access vlan 10 ! DVLAN CAT3550(config-if)# switchport voice vlan 110 ! VVLAN CAT3550(config-if)# mls qos trust device cisco-phone ! Conditional Trust CAT3550(config-if)# service-policy input IPPHONE+PC-ADVANCED ! Attaches policy CAT3550(config-if)#exit CAT3550(config)# CAT3550(config)#ip access list standard ANY ! Workaround ACL CAT3550(config-std-nacl)# permit any CAT3550(config-std-nacl)# CAT3550(config-std-nacl)#ip access list extended PC-VIDEO ! IP/VC or SoftPhone CAT3550(config-ext-nacl)# permit udp any any range 16384 32767 CAT3550(config-ext-nacl)# CAT3550(config-ext-nacl)#ip access list extended MISSION-CRITICAL-DATA CAT3550(config-ext-nacl)# permit tcp any any range 3200 3203 ! SAP CAT3550(config-ext-nacl)# permit tcp any any eq 3600 ! SAP CAT3550(config-ext-nacl)# permit tcp any any range 2000 2002 ! SoftPhone SCCP CAT3550(config-ext-nacl)# CAT3550(config-ext-nacl)#ip access list extended TRANSACTIONAL-DATA CAT3550(config-ext-nacl)# permit tcp any any eq 1352 ! Lotus CAT3550(config-ext-nacl)# CAT3550(config-ext-nacl)#ip access list extended BULK-DATA CAT3550(config-ext-nacl)# permit tcp any any eq 143 ! IMAP CAT3550(config-ext-nacl)# permit tcp any any eq 220 ! IMAP CAT3550(config-ext-nacl)#end CAT3550# Version 3.3
Chapter 2 Campus QoS Design Catalyst MLS QoS Verification Commands Version 3.3 Catalyst 3550—QoS Considerations and Design The Catalyst MLS QoS verification commands for Conditionally-Trusted IP Phone + PC + Scavenger (Advanced) Model include the following: show mls qos show mls qos map show mls qos interface show mls qos interface policers show mls qos statistics show class-map show policy-map show policy interface Catalyst 3550—Queuing and Dropping Configuration This section includes the following topics: Configuration Advanced Tuning Options Catalyst MLS QoS Verification Commands Like the Catalyst 2950, the Catalyst 3550 supports a 1P3Q1T queuing model for all ports. GigabitEthernet ports have the additional option of being configured as 1P3Q2T, with either tail-drop or WRED thresholds. However, unlike the Catalyst 2950, the Catalyst 3550 queuing parameters are set on a per-interface basis and not globally. Nonetheless, uniform queuing policies can be expeditiously deployed via the interface range configuration command. The strict-priority queue is enabled on a per-interface basis on the Catalyst 3550 with the priority-queue out interface command. Bandwidth is allocated among the remaining queues via the wrr-queue bandwidth command. A twist with the Catalyst 3550 is that Queue 4’s WRR weight is set to 1 (indicating that it does not participate in the WRR scheduler since it is configured as a strict-priority queue), instead of 0 (as is the case on the Catalyst 2950). Recommended remaining bandwidth allocations (after the PQ has been fully serviced) are 5% for the Scavenger queue (Q1), 25% for the Best-Effort queue (Q2), and 70% for the preferential application queue (Q3). Following this, CoS 1 (Scavenger/Bulk) would be assigned to Q1; CoS 0 (Best Effort) would be assigned to Q2; CoS values 2 (Transactional Data and Network Management), 3 (call signaling and Mission-Critical Data), 4 (Interactive and Streaming-Video, 6 (Internetwork Control) and 7 (Network Control/Spanning-Tree) would be assigned to Q3; CoS 5 (voice) would be assigned to the strict-priority Q4. These assignments and allocations are illustrated in Figure 2-15 (the thresholds shown in Q1 and Q3 are discussed shortly). Enterprise QoS Solution Reference Network Design Guide 2-41
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Enterprise QoS Solution Reference Network Design Guide

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