On Tue, 2010-03-16 at 20:34 +1000, [email protected] wrote: > Wondering if you could share you current setup for buffers/queues etc > (We are currently running "default")
Sure, I've pasted our default template below. Keep in mind that it was developed in a "trial and error" (or maybe rather "try all and err"!) fashion, without any real knowledge about exactly how the hardware platform works. It's a very very simple QoS configuration. We only do voice policing/priority and no "real" QoS. We previously tried a more complex service policy, but kept getting these messages: %QOSMGR-4-HARDWARE_NOT_SUPPORTED Hardware limitation has reached for policymap ACCESS-INGRESS This configuration only attempts to allocate as much buffer as possible for data traffic. I hope the configuration doesn't make me the laughingstock of c-nsp. Comments about inappropriate configuration are more than welcome. :-) * Start of generic template * !;Configuration template for RM client access switches ! Quality of Service MLS configuration ! This template does not include interface related configuration ! Last update: 2009-11-15, [email protected] ! ! Reset "mls qos" settings no mls qos map cos-dscp no mls qos map policed-dscp no mls qos srr-queue input threshold 1 no mls qos srr-queue input threshold 2 no mls qos srr-queue input priority-queue 1 no mls qos srr-queue input dscp-map no mls qos srr-queue input cos-map no mls qos srr-queue input bandwidth no mls qos srr-queue input buffers no mls qos queue-set output 1 threshold no mls qos queue-set output 1 buffers no mls qos queue-set output 2 threshold no mls qos queue-set output 2 buffers no mls qos srr-queue output dscp-map no mls qos srr-queue output cos-map ! ! Standard CoS-DSCP-map, i.e. DSCP = CoS * 8 except CoS 5 which is mapped to EF (46). mls qos map cos-dscp 0 8 16 24 32 46 48 56 ! Excess EF traffic down-classed to AF41 mls qos map policed-dscp 46 to 34 ! ! ! ***** Definition of input-queues ***** ! mls qos srr-queue input threshold 1 90 100 mls qos srr-queue input threshold 2 90 95 ! Input queue 2 is is priority with 5% bandwidth guarantee mls qos srr-queue input priority-queue 2 bandwidth 5 ! DSCP-mapping mls qos srr-queue input dscp-map queue 1 threshold 3 0 1 2 3 4 5 6 7 mls qos srr-queue input dscp-map queue 1 threshold 1 8 9 10 11 12 13 14 15 mls qos srr-queue input dscp-map queue 1 threshold 3 16 17 18 19 20 21 22 23 mls qos srr-queue input dscp-map queue 1 threshold 3 24 25 26 27 28 29 30 31 mls qos srr-queue input dscp-map queue 1 threshold 3 32 33 34 35 36 37 38 39 mls qos srr-queue input dscp-map queue 2 threshold 2 40 41 42 43 44 45 46 47 mls qos srr-queue input dscp-map queue 2 threshold 3 48 49 50 51 52 53 54 55 mls qos srr-queue input dscp-map queue 2 threshold 3 56 57 58 59 60 61 62 63 ! CoS-translation of above mls qos srr-queue input cos-map queue 1 threshold 1 1 mls qos srr-queue input cos-map queue 1 threshold 3 0 2 3 4 mls qos srr-queue input cos-map queue 2 threshold 2 5 mls qos srr-queue input cos-map queue 2 threshold 3 6 7 ! ! Input bandwidth, 90% for queue 1, 10% for queue 2 mls qos srr-queue input bandwidth 9 1 ! Input buffer depth, 95% for queue 1, 5% for queue 2 (which is non-bursty) mls qos srr-queue input buffers 95 5 ! ! ! ***** Definition of output-queues ***** ! ! Generally speaking: ! Queue 1 is "priority", 5% bandwidth and 5% buffers ! Queue 2 is "other", 95% bandwidth and 95% buffers ! ! Q1: Voice traffic, control traffic ! Q2: Other traffic ! Q3: Unused ! Q4: Unused ! mls qos queue-set output 1 buffers 5 95 0 0 ! WTD: Queue 1 is priority, WTD set to 100% for all levels. mls qos queue-set output 1 threshold 1 100 100 100 100 ! WTD: Queue 2 is "other" mls qos queue-set output 1 threshold 2 3100 3100 100 3200 ! ! Egress mapping ! Priority => queue 1, threshold 3 (40-63) ! Scavenger => queue 2, threshold 1 (8-15) ! Other => queue 2, threshold 3 (0-7,16-39) mls qos srr-queue output dscp-map queue 2 threshold 3 0 1 2 3 4 5 6 7 mls qos srr-queue output dscp-map queue 2 threshold 1 8 9 10 11 12 13 14 15 mls qos srr-queue output dscp-map queue 2 threshold 3 16 17 18 19 20 21 22 23 mls qos srr-queue output dscp-map queue 2 threshold 3 24 25 26 27 28 29 30 31 mls qos srr-queue output dscp-map queue 2 threshold 3 32 33 34 35 36 37 38 39 mls qos srr-queue output dscp-map queue 1 threshold 3 40 41 42 43 44 45 46 47 mls qos srr-queue output dscp-map queue 1 threshold 3 48 49 50 51 52 53 54 55 mls qos srr-queue output dscp-map queue 1 threshold 3 56 57 58 59 60 61 62 63 ! mls qos srr-queue output cos-map queue 2 threshold 1 1 mls qos srr-queue output cos-map queue 2 threshold 3 0 2 3 4 mls qos srr-queue output cos-map queue 1 threshold 3 5 6 7 ! mls qos ! end * End of generic template * Then there's the service-policy defintion: * Start of service-policy template * !;Configuration template for RM client access switches ! Quality of Service ACL, class-map and policy-map configuration ! This template does not include interface related configuration ! Last update: 2009-11-15, [email protected] ! no policy-map ACCESS-INGRESS no class-map Match-QoS-Priority no class-map Match-QoS-EF no ip access-list extended QoS-Priority ! ! --- QoS ! ACL for identifying VoIP traffic ip access-list extended QoS-Priority remark --- VoIP devices permit ip <voice access net + wilcard mask> any permit ip any <voice access net + wildcard mask> remark --- Callmanagers et al permit ip <voice services net + wildcard mask> any permit ip any <voice services net + wildcard mask> exit ! ! Definition of class-map for above ACL: class-map Match-QoS-Priority match access-group name QoS-Priority exit ! class-map Match-QoS-EF match ip dscp ef exit ! ! Definition of policy-map for standard access interface policy-map ACCESS-INGRESS class Match-QoS-Priority trust dscp police 10000000 96000 exceed-action policed-dscp-transmit exit ! ! Remark EF traffic not belonging to Match-QoS-Priority class Match-QoS-EF set ip dscp af41 exit ! class class-default set ip dscp af43 exit ! exit ! end * End of service-policy template * The interface configuration for a 3560-24 would then be: * Start of interface specific template for WS-C3560-24PS * ! Cisco 3560, 24 FE-TX + 2 SFP interface range FastEthernet0/1 - 24 ! Downlink no auto qos voip queue-set 1 srr-queue bandwidth shape 0 0 0 0 srr-queue bandwidth share 5 95 1 1 priority-queue out service-policy input ACCESS-INGRESS exit ! interface range GigabitEthernet0/1 - 2 ! Uplink no auto qos voip queue-set 1 srr-queue bandwidth shape 0 0 0 0 srr-queue bandwidth share 5 95 1 1 priority-queue out mls qos trust dscp exit ! end * End of interface specific template for WS-C3560-24PS * -- Peter _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
