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1 CHAPTER 11 3 Random Early Detection RED; Cisco p.11-2 p.11-3 ID p.11-6 p.11-7 p.11-8 RED p.11-9 WRED p p p p p p p Cisco QoS 11-1

2 ,000 Virtual Circuit VC; 64,000 Cisco IOS Release 12.3(7)XI1 128,000 Cisco IOS Release 12.3(7)XI2 32,000 Assured Forwarding AF; Expedited Forwarding EF; Best Effort BE PRE3 Release 12.2(31)SB2 PRE2 Release 12.3(7)XI PRE2 Release 12.2(16)BX PRE1 256, ,070 65,534 32, , ,194, , PRE3 4,194,304 4,194,304 1,048, Cisco QoS

3 Cisco IOS PRE ,384 PRE2 PRE2 2 2 Cisco IOS Release 12.2(15)BX 32 16,384 Release 12.2(16)BX 2 Cisco IOS Release 12.3(7)XI 500 MB MB ,000 PRE3 PRE4 2 Cisco IOS Release 12.2(31)SB ,767 queue-limit 500 Mbps PRE1 1 Gbps PRE2 PRE3 WRED WRED 2 2 Cisco IOS Release 12.2(15)BX Release 12.2(16)BX 2 Cisco QoS 11-3

4 11 WRED PRE2 16 PRE3 WRED PRE2 16 PRE3 4,194,304 [p.11-3] RED 2 show policy-map interface Cisco IOS Release 12.0(25)SX Release 12.3(7)XI RED queue-limit queue-limit p.11-4red p.11-9 WRED p Cisco IOS Release 12.0(25)SX Release 12.3(7)XI RED IP precedence Differentiated Services Code Point DSCP RED 131, / 4,194, ,070 = ,070 3 p p queue-limit queue-limit no queue-limit number-of-packets no queue-limit number-of-packets 11-4 Cisco QoS

5 11 number-of-packets PRE1 number-of-packets 32 16, PRE 2 Cisco IOS Release 12.2(15)BX Release 12.2(16)BX number-of-packets 32 16,384 2 PRE 2 Cisco IOS Release 12.3(7)XI 500 MB number-of-packets MB number-of-packets , PRE3 Cisco IOS Release 12.2(31)BX number-of-packets 1 32,767 2 queue-limit Cisco IOS Release 12.0(17)SL Release 12.0(25)SX Release 12.2(16)BX Release 12.3(7)XI Release 12.2(28)SB Release 12.2(31)SB2 queue-limit PRE1 queue-limit random-detect PRE2 PRE2 queue-limit random-detect PRE2 Cisco IOS Release 12.2(28)SB PRE3 queue-limit WRED queue-limit WRED WRED 2 2 PRE2 Cisco IOS Release 12.2(15)BX Release 12.2(16)BX PRE3 Cisco IOS Release 12.2(31)SB2 2 WRED Cisco QoS 11-5

6 ID 11 queue-limit bandwidth 131,070 queue-limit bandwidth p.11-4 Cisco IOS Release 12.2(16)BX 2 2 ID Queue ID QID QID QID 11-3 QID QID PRE1 500 Mbps 1 32, Mbps 2 PRE2 622 Mbps 1 130, Mbps PRE , QID 0 QID 1 QID PRE3 PRE2 OC-48 1 PRE1 QID PRE2 QID out of resource 1 QID show ha pxf cpu queue summary 11-6 Cisco QoS

7 11 Cisco ATM p.11-7 p.11-7 VLAN p.11-8 ATM Asynchronous Transfer Mode ATM; Cisco Unspecified Bit Rate UBR; Permanent Virtual Circuit PVC; 1 Variable Bit Rate VBR; PVC Peak Cell Rate PCR; UBR PVC 1 VBR PCR UBR PVC 1 1 UBR PVC VBR PVC UBR PVC VBR PVC UBR PVC PVC Cisco PVC PVC PVC PVC PVC PVC PVC PVC PVC 13 QoS QoS CLI PVC A QoS Cisco QoS 11-7

8 11 VLAN Cisco VLAN LAN VLAN VLAN 13 QoS 3 Class of Service CoS; Cisco IOS PRE Release 12.0(17)SL PRE1 Release 12.2(16)BX PRE2 PRE2 Release 12.2(28)SB PRE2 Cisco IOS Release 12.2(28)SB PRE2 Release 12.2(31)SB2 PRE3 PRE2 PRE3 RED Cisco RED RED RED RED RED p.11-9 WRED p Cisco QoS

9 11 RED RED RED 3 1 RED RED TCP RED RED 1 IP precedence RED IP precedence RED IP precedence RED TCP DSCP RED DSCP RED RED DSCP PRE1 DSCP RED 1 3 AF 4 AF RED Cisco IOS PRE Release 12.0(17)SL RED PRE1 Release 12.0(22)S DSCP RED PRE1 Release 12.0(25)SX random-detect PRE1 queue-limit Release 12.2(16)BX PRE2 PRE2 Release 12.2(28)SB PRE2 Cisco IOS Release 12.2(28)SB PRE2 Release 12.2(31)SB2 PRE3 PRE3 RED RED RED RED Cisco IOS Release 12.0(25)SX Cisco IOS Release 12.0(25)SX random-detect queue-limit Cisco QoS 11-9

10 RED 11 RED 3 RED RED RED RED RED 11-1 RED 11-1 RED 100% RED RED RED RED RED Cisco QoS

11 11 WRED WRED WRED 3 1 WRED RED IP precedence DSCP WRED WRED 3 WRED WRED 3 WRED WRED 1 IP precedence WRED IP precedence WRED IP precedence WRED TCP IP precedence WRED Multiprotocol Label Switching MPLS; IP 3 IP precedence MPLS 3 Experimental EXP MPLS DSCP WRED DSCP WRED WRED DSCP WRED WRED 0 7 Per-Hop Behavior PHB WRED ATM Cell Loss Priority CLP; WRED CLP WRED 0 1 CLP ATM 2 VPN ATM ATM CLP WRED IP precedence DSCPWRED RED PRE2 RED PRE3 RED WRED Cisco IOS PRE Release 12.0(17)SL WRED PRE1 Release 12.0(22)S DSCP WRED PRE1 Cisco QoS 11-11

12 WRED 11 Cisco IOS PRE Release 12.0(25)SX random-detect PRE1 queue-limit Release 12.2(16)BX PRE2 RED PRE2 Release 12.3(7)XI PRE2 PRE random-detect queue-limit WRED Release 12.2(28)SB Release 12.2(31)SB2 Release 12.2(33)SB IP precedence DSCP WRED PRE2 Cisco IOS Release 12.2(28)SB PRE2 PRE3 RED PRE3 PRE3 DiffServ PRE3 PRE4 ATM CLP PRE3 PRE4 WRED WRED WRED WRED 1 WRED WRED IP precedence QoS Quality of Service WRED WRED WRED IP precedence DSCP 0 0 IP precedence WRED IP precedence WRED IP precedence 0 IP precedence 7 WRED WRED TCP/IP TCP/IP WRED Cisco QoS

13 11 WRED WRED TCP TCP/IP WRED WRED WRED WRED WRED WRED DSCP IP precedence ATM CLP WRED 11-4 WRED WRED IP precedence 11-4 WRED random-detect dscp-based min-thresh-value max-thresh-value mark-probability-denominator-value random-detect prec-based min-thresh-value max-thresh-value mark-probability-denominator-value random-detect discard-class-based min-thresh-value max-thresh-value mark-probability-denominator-value DSCP PRE2 PRE3 PRE4 IP precedence PRE2 PRE3 PRE4 PRE2 PRE3 PRE4 min-thresh-value PRE3 random-detect atm-clp-based min-thresh-value max-thresh-value mark-probability-denominator-value ATM CLP PRE2 PRE3 PRE4 WRED DSCP IP precedence 1 16,384 PRE3 random detect discard-class WRED DSCP IP precedence min-threshold 1 Cisco QoS 11-13

14 WRED , PRE random-detect WRED p WRED p WRED WRED WRED DSCP IP precedence ATM CLP 11-5 PRE PRE2 random-detect PRE3 PRE4 random-detect random-detect basis random-detect dscp-based aggregate random-detect discard-class-based random-detect atm-clp-based PRE3 PRE4 WRED IP precedence 11-5 WRED random-detect dscp dscp-value min-thresh-value max-thresh-value mark-probability-denominator-value DSCP 0 63 PRE3 PRE4 random-detect dscp values sub-class-val1 [...[sub-class-val8]] minimum-thresh min-thresh-value maximum-thresh max-thresh-value mark-prob mark-prob-value random-detect ip precedence precedence-value min-thresh-value max-thresh-value mark-probability-denominator-value PRE3 PRE4 random-detect precedence values sub-class-val1 [...[sub-class-val8]] minimum-thresh min-thresh-value maximum-thresh max-thresh-value mark-prob mark-prob-value IP precedence Cisco QoS

15 11 WRED 11-5 WRED random-detect discard-class discard-class-value min-thresh-value max-thresh-value mark-probability-denominator-value 0 7 PRE3 PRE4 random-detect discard-class discard-class-value min-thresh-value max-thresh-value mark-probability-denominator-value random-detect atm-clp clp-value min-thresh-value max-thresh-value mark-probability-denominator-value ATM CLP 0 1 PRE3 PRE4 random-detect atm-clp clp-value min-thresh-value max-thresh-value mark-probability-denominator-value PRE3 WRED 32,000 PRE3 21 WRED class-default net-control 2 net-control PRE class-default 32,000 64,000 PRE3 WRED 21 32,000 PRE3 21 WRED class-default net-control 2 net-control 12 class-default PRE WRED 11-6 WRED WRED PRE PRE1 4 1 PRE2 8 2 PRE , ,000 64, class-default net-control 2 Cisco QoS 11-15

16 WRED 11 WRED WRED PRE3 PRE4 random-detect DSCP 1 / 1 PRE3 PRE4 random-detect PRE2 DSCP IP precedence 1 DSCP IP precedence 1 1 WRED 1 DSCP IP precedence PRE3 PRE4 andom-detect random-detect aggregate [minimum-thresh min-thresh-value maximum-thresh max-thresh-value mark-prob mark-prob-value] random-detect {precedence-based dscp-based} aggregate [minimum-thresh min-thresh-value maximum-thresh max-thresh-value mark-prob mark-prob-value] random-detect {precedence dscp} values [sub-class-val1 [...sub-class-val8] [minimum-thresh min-thresh-value maximum-thresh max-thresh-value mark-prob mark-prob-value]] random-detect PRE3 PRE4 random-detect {precedence-based dscp-based} PRE3 PRE4 CLP PRE2 random-detect {discard-class-based atm-clp-based} random-detect {discard-class discard-class-value clp clp-value} [min-thresh-value] [max-thresh-value] [mark-probability-denominator-value] WRED DSCP DSCP 1 DSCP 2 DSCP random-detect dscp values [dscp-val1 [...dscp-val8] [minimum-thresh min-thresh-value maximum-thresh max-thresh-value mark-prob mark-prob-value] DSCP DSCP 1 random-detect 1 WRED 1 random-detect Cisco QoS

17 11 WRED PRE3 PRE4 random-detect random-detect {precedence-based dscp-based} aggregate [minimum-thresh min-thresh-value maximum-thresh max-thresh-value mark-prob mark-prob-value] random-detect PRE3 PRE4 random-detect {precedence-based dscp-based} PRE3 PRE4 ATM CLP PRE2 random-detect discard-class-based random-detect discard-class discard-class-value min-thresh-value max-thresh-value mark-probability-denominator-value random-detect atm-clp-based random-detect clp clp-value min-thresh-value max-thresh-value mark-probability-denominator-value random-detect WRED IP precedence random-detect bandwidth random-detect max-threshold queue-limit max-threshold max-threshold WRED max-threshold max-threshold WRED exponential-weight-constant =1 2 n+ 2 n n MPLS WRED MPLS EXP random-detect dscp random-detect dscp-based random-detect dscp dscp-based WRED DSCP IP Type of Service ToS; 6 Cisco QoS 11-17

18 WRED 11 random-detect ip precedence random-detect prec-based random-detect ip precedence prec-based WRED IP precedence mark-probability-denominator 10 max-threshold WRED random-detect discard-class random-detect discard-class-based random-detect discard-class discard-class-based WRED random-detect WRED DSCP IP precedence atm-clp 1 16,384 WRED DSCP IP precedence atm-clp 16, DSCP IP precedence WRED 3 = 11/32 = 1/ PRE2 PRE3 WRED DSCP precedence Cisco QoS

19 11 WRED 11-7 WRED DSCP DSCP 1/4 1/2 1/10 0 1/4 1/2 1/10 1 9/32 1/2 1/10 2 5/16 1/2 1/ /32 1/2 1/10 4 3/8 1/2 1/ /32 1/2 1/10 6 7/16 1/2 1/ /32 1/2 1/10 WRED p WRED WRED queue-limit WRED WRED Cisco IOS Release 12.3(7)XI Cisco IOS Release 12.3(7)XI random-detect queue-limit 2 2 random-detect max-threshold queue-limit max-threshold max-threshold WRED max-threshold max-threshold WRED Cisco QoS 11-19

20 WRED 11 =1 2 n+ 2 n n WRED WRED WRED WRED WRED Cisco QoS

21 queue-limit random-detect RED WRED queue-limit random-detect Multilink PPP MLP; PPP ATM PCR UBR PVC * ATM Constant Bit Rate CBR; PVC * ATM VBR PVC * Label-Controlled ATM LC-ATM; ATM ** PVC ** VLAN ** * PRE3 ATM PVC MQC ATM queue-limit random-detect ** 13 QoS queue-limit random-detect queue-limit random-detect ATM PCR UBR PVC IP VAI QoS [p.4-26] queue-limit random-detect Cisco QoS 11-21

22 ATM UBR PVC UBR PVC PCR bandwidth bandwidth remaining (PRE2) bandwidth remaining ratio (PRE3) bandwidth remaining percent (PRE3) priority shape Cisco IOS Release 12.0(25)SX Release 12.3(7)XI queue-limit random-detect 1,048,576 PRE1 4,194,304 PRE2 [out of resources] queue-limit show pxf cpu queue summary CSCed81996 Cisco IOS Release 12.2(33)SB show pxf cpu queue interface summary -Traceback= 604D58EC 604C00C0 604C C43C4 604C43E4 604C254C 604C260C 604C478C 60D4B AC B C C A4! Router# config terminal Enter configuration commands, one per line.end with CNTL/Z. Router(config)# policy-map qos_pq_cbwfq_0 Router(config-pmap)# class dscp_10 Router(config-pmap-c)# queue-limit 32 Queue limit failed on ATM2/0/ VC 2484 (out of resources) Queue limit failed on ATM2/0/ VC 2485 (out of resources) Queue limit failed on ATM2/0/ VC 2486 (out of resources) Queue limit failed on ATM2/0/ VC 2487 (out of resources) Queue limit failed on ATM2/0/ VC 2488 (out of resources) Queue limit failed on ATM2/0/ VC 2489 (out of resources)!! Queue limit failed on ATM3/0/ VC 1547 (out of resources) Queue limit failed on ATM3/0/ VC 1548 (out of resources)!! -Traceback= 604D58EC 604C00C0 604C C43C4 604C43E4 604C254C 604C260C 604C478C 60D4B AC B C C A4 -Traceback= 6049CA CCA BFA4C 604C3EEC 604C3EE4 604C C260C 604C478C 60D4B AC B C C A Cisco QoS

23 11 3 RED WRED bandwidth bandwidth remaining shape RED MPLS DSCP WRED IP random-detect dscp-based random-detect prec-based random-detect discard-class-based WRED bandwidth DSCP WRED 1 3 AF 4 AF PRE1 4 AF PRE2 PRE3 WRED WRED DSCP precedence discard-class Bronze WRED WRED DSCP class-map Bronze match ip dscp policy-map Business class Bronze random-detect dscp random-detect dscp default PRE2 DSCP WRED DSCP 8 DSCP WRED PRE1 DSCP WRED DSCP 4 4 PRE1 DSCP WRED IP precedence WRED Cisco QoS 11-23

24 p DSCP p IP precedence p p ATM CLP p Router(config)# policy-map policy-map-name policy-map-name 2 Router(config-pmap)# class class-map-name 3 Router(config-pmap-c)# bandwidth {bandwidth-kbps percent percent} class-map-name QoS kbps Cisco QoS

25 Router# queue-limit number-of-packets PRE1 number-of-packets 32 16, PRE2 Cisco IOS Release 12.2(15)BX Release 12.2(16)BX number-of-packets 32 16,384 2 PRE2 Cisco IOS Release 12.3(7)XI 500 MB number-of-packets 8 4, MB number-of-packets ,000 2 PRE3 number-of-packets 1 32,767 2 number-of-packets p WRED queue-limit WRED WRED 2 2 Cisco IOS Release 12.2(15)BX Release 12.2(16)BX 2 WRED Class1 Class2 2 Policy1 Class1 Class1 32 Class2 PVC 1/32 Policy1 QoS Cisco QoS 11-25

26 Router(config)# policy-map Policy1 Router(config-pmap)# class Class1 Router(config-pmap-c)# bandwidth 3000 Router(config-pmap-c)# queue-limit 32 Router(config-pmap-c)# exit Router(config-pmap)# class Class2 Router(config-pmap-c)# bandwidth 2000 Router(config-pmap-c)# exit Router(config)# interface atm 1/0/0 Router(config-if)# atm pxf queuing Router(config-if)# interface atm 1/0/0.1 point-to-point Router(config-subif)# pvc 1/32 Router(config-subif-atm-vc)# ubr Router(config-subif-atm-vc)# service-policy output Policy1 DSCP DSCP WRED 1 Router(config-if)# class-map class-map-name class-map-name 2 Router(config-cmap)# match match-criterion match-criterion match p Router(config-cmap)# exit 4 Router(config)# policy-map policy-map-name 1 policy-map-name 5 Router(config-pmap)# class class-map-name QoS class-map-name Cisco QoS

27 PRE2 Router(config-pmap-c)# random-detect dscp-based PRE3 Router(config-pmap-c)# random-detect dscp-based aggregate [minimum-thresh min-thresh maximum-thresh max-thresh mark-prob mark-prob] PRE2 Router(config-pmap-c)# random-detect dscp dscp-value min-thresh-value max-thresh-value mark-probability-denominator-value PRE3 Router(config-pmap-c)# random-detect dscp values sub-class-val1 [...[sub-class-val8]] minimum-thresh min-thresh maximum-thresh max-thresh mark-prob mark-prob WRED DSCP min-thresh 1 16,384 max-thresh 16,384 mark-prob 1 65, WRED DSCP dscp-value sub-class-val DSCP 0 63 ef af11 af12 af13 af21 af22 af23 af31 af32 af33 af41 af42 af43 cs1 cs2 cs3 cs4 cs5 cs7 min-threshold 1 16,384 max-thresh 16,384 mark-probability-denominator-value PRE2 mark-prob PRE3 1 65, Router(config-pmap-c)# exit 9 Router(config-pmap)# exit Router(config)# interface type slot/module/port.subinterface-number Router(config-if)# service-policy output policy-map-name VC VC policy-map-name 4 Cisco QoS 11-27

28 3 11 DSCP WRED 11-2 Gold Business WRED Gold DSCP 8 Business atm 1/0/ DSCP WRED Router(config-if)# class-map Gold Router(config-cmap)# match access-group 101 Router(config-cmap)# exit Router(config)# policy-map Business Router(config-pmap)# class Gold Router(config-pmap-c)# bandwidth 48 Router(config-pmap-c)# random-detect dscp-based Router(config-pmap-c)# random-detect dscp Router(config-pmap-c)# exit Router(config-pmap)# exit Router(config)# interface atm 1/0/0 Router(config-if)# service-policy output Business IP precedence IP precedence 1 Router(config)# policy-map policy-map-name policy-map-name 2 Router(config-pmap)# class class-map-name 3 PRE2 Router(config-pmap-c)# random-detect precedence-based PRE3 Router(config-pmap-c)# random-detect precedence-based aggregate [minimum-thresh min-thresh maximum-thresh max-thresh mark-prob mark-prob] class-map-name QoS WRED IP precedence min-thresh 1 16,384 max-thresh 16,384 mark-prob 1 65, Cisco QoS

29 Router(config-pmap-c)# random-detect precedence prec-value min-thresh-value max-thresh-value mark-probability-denominator-value PRE3 Router(config-pmap-c)# random-detect precedence values sub-class-val1 [...[sub-class-val8]] minimum-thresh min-thresh maximum-thresh max-thresh mark-prob mark-prob WRED IP precedence prec-value PRE2 valuessub-class-val PRE3 IP precedence 0 7 min-thresh 1 16,384 max-thresh 16,384 mark-probability-denominator-value PRE2 mark-prob PRE3 1 65, IP precedence 11-3 IP precedence WRED Class1 IP precedence IP precedence Policy1 Class1 Class1 IP precedence 3 WRED QoS atm 1/0/0.1 PVC 1/ IP precedence WRED Router(config)# class-map Class1 Router(config-cmap)# match ip precedence Router(config-cmap)# exit Router(config)# policy-map Policy1 Router(config-pmap)# class Class1 Router(config-pmap-c)# bandwidth 1000 Router(config-pmap-c)# random-detect prec-based Router(config-pmap-c)# random-detect precedence Router(config-pmap-c)# exit Router(config-pmap)# exit Router(config)# interface atm 1/0/0 Router(config-if)# atm pxf queuing Router(config-if)# interface atm 1/0/0.1 point-to-point Router(config-subif)# pvc 1/32 Router(config-subif-atm-vc)# ubr Router(config-subif-atm-vc)# service-policy output policy1 Cisco QoS 11-29

30 3 11 Cisco IOS Release 12.3(7)XI PRE2 Cisco IOS Release 12.2(31)SB2 PRE3 1 Router(config)# policy-map policy-map-name policy-map-name 2 Router(config-pmap)# class class-map-name 3 4 PRE2, PRE3 Router(config-pmap-c)# random-detect discard-class-based PRE2, PRE3 Router(config-pmap-c)# random-detect discard-class discard-class-value min-thresh-value max-thresh-value mark-probability-denominator-value class-map-name QoS WRED WRED discard-class-value 0 7 min-thresh-value 1 16,384 max-thresh-value 16,384 mark-probability-denominator-value 1 65, Cisco QoS

31 WRED Silver Premium Silver Silver 5 WRED QoS atm 2/0/0.2 PVC 1/ WRED Router(config)# class-map Silver Router(config-cmap)# match discard-class 3 5 Router(config-cmap)# exit Router(config)# policy-map Premium Router(config-pmap)# class Silver Router(config-pmap-c)# bandwidth percent 30 Router(config-pmap-c)# random-detect discard-class-based Router(config-pmap-c)# random-detect discard-class Router(config-pmap-c)# exit Router(config-pmap)# exit Router(config)# interface atm 2/0/0 Router(config-if)# atm pxf queuing Router(config-if)# interface atm 2/0/0.2 point-to-point Router(config-subif)# pvc 1/81 Router(config-subif-atm-vc)# ubr Router(config-subif-atm-vc)# service-policy output Premium ATM CLP ATM CLP CLP PRE3 Cisco IOS Release 12.2(33)SB 1 Router(config)# policy-map policy-map-name policy-map-name 2 Router(config-pmap)# class class-map-name 3 Router(config-pmap-c)# random-detect atm-clp-based class-map-name QoS WRED CLP Cisco QoS 11-31

32 Router(config-pmap-c)# random-detect clp [clp-value] [min-thresh-value] [max-thresh-value] [mark-probability-denominator-value] WRED CLP clp-value CLP 0 1 min-thresh-value 1 16,384 max-thresh-value 16,384 mark-probability-denominator-value 1 65, CLP 11-5 ATP CLP WRED CLP 1 class1 policymap1 class1 ATP CLP WRED CLP 1 WRED WRED CLP WRED Router(config)# class-map class1 Router(config-cmap)# match clp 1 Router(config-cmap)# exit Router(config)# policy-map policymap1 Router(config-pmap)# class class1 Router(config-pmap-c)# random-detect atm-clp-based Router(config-pmap-c)# random-detect clp Router(config-pmap-c)# exit Router(config-pmap)# exit Cisco QoS

33 Cisco IOS Release 12.0(25)SX Release 12.3(7)XI IP precedence Cisco IOS Release 12.0(25)SX Release 12.3(7)XI IP precedence DSCP WRED precedence EXEC Router# show interface type slot/module/port.subinterface Router# show policy-map policy-map-name Cisco IOS Release 12.3(7)XI IP precedence DSCP WRED Router# show policy-map interface Router# show pxf cpu queue interface Cisco IOS Release 12.3(7)XI VC EXEC Router# show pxf cpu queue interface 2 wq_len wq_limit_drop packet xmit byte xmit Cisco QoS 11-33

34 3 11 Router# show pxf cpu queue interface summary QID Cisco IOS Release 12.2(33)SB PRE3 PRE4 Router# show pxf cpu schedule show pxf PRE1 show hardware pxf 11-6 show policy-map interface serial 1/0/0 3 Traffic-5-PR Voice-5-PR 32 0 Gold-5-PR 0 Silver-5-PR Router# show policy-map interface serial 1/0/0 Serial1/0/0 Service-policy output: Traffic-Parent (1051) Class-map: class-default (match-any) (1068/0) packets, bytes 5 minute offered rate 1000 bps, drop rate 0 bps Match: any (1069) packets, bytes 5 minute rate 0 bps Shape : 6000 kbps Service-policy : Traffic-5-PR (1052) Class-map: Voice-5-PR (match-all) (1053/1) packets, bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip precedence 5 (1054) Output queue: 0/32; 82310/ packets/bytes output, 0 drops Absolute priority Queue-limit: 32 packets Police: bps, 1536 limit, 0 extended limit conformed packets, bytes; action: transmit exceeded 0 packets, 0 bytes; action: drop violated 0 packets, 0 bytes; action: drop Cisco QoS

35 11 3 Class-map: Gold-5-PR (match-any) (1058/2) packets, bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip precedence 3 4 (1059) packets, bytes 5 minute rate 0 bps Output queue: 0/128; / packets/bytes output, 0 drops Bandwidth : 188 kbps (Weight 3) Class-map: Silver-5-PR (match-any) (1061/3) packets, bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip precedence (1062) packets, bytes 5 minute rate 0 bps Output queue: 0/64; / packets/bytes output, 0 drops Bandwidth : 71 kbps (Weight 1) Random-detect (precedence-based): Exponential weight: 9 (1/512) Current average queue length: 0 packets Min Max Prob Rand-Drops Tail-Drops / / / / / / / / Queue-limit: 64 packets Class-map: class-default (match-any) (1066/0) packets, bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: any (1067) packets, bytes 5 minute rate 0 bps Output queue: 0/128; 31672/ packets/bytes output, 0 drops Cisco QoS 11-35

36 3 11 DSCP WRED 11-7 show policy-map interface nyusers DSCP WRED 9 WRED DSCP 8 DSCP DSCP WRED Router# show policy-map interface GigabitEthernet 3/0/0 GigabitEthernet3/0/0 Service-policy output: manhattan Class-map: nyusers (match-all) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 101 Output queue: 0/128; 0/0 packets/bytes output, 0 drops Bandwidth : 47 kbps (Weight 0) Random-detect (DSCP-based): Exponential weight: 9 (1/512) Current average queue length: 0 packets Diff-Serv Min Max Mark Rand-Drops Tail-Drops codepoint thres thres probability / Default / Class-map: class-default (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: any Output queue: 0/4096; 0/0 packets/bytes output, 0 drops 11-8 show class-map show class-map DSCP 0 DSCP DSCP per_dscp_class 11-8 show class-map Router# show class-map per_dscp_class Class Map match-all per_dscp_class (id 11) Match ip dscp default show policy-map show policy-map per_dscp_class DSCP show policy-map Router# show policy-map per_dscp_policy Policy Map per_dscp_policy Class per_dscp_class priority random-detect dscp-based random-detect dscp random-detect dscp random-detect dscp random-detect dscp Cisco QoS

37 11 3 IP precedence WRED show policy-map interface new-users IP precedence WRED precedence mark probability RED IP precedence WRED Router# show policy-map interface FastEthernet 3/0/0 FastEthernet3/0/0 Service-policy output: voice Class-map: new-users (match-all) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 101 Output queue: 0/128; 0/0 packets/bytes output, 0 drops Bandwidth: 47 kbps (Weight 0) Random-detect (precedence-based): Exponential weight: 9 (1/512) Current average queue length: 0 packets TOS MinMaxMark Rand-DropsTail-Drops precedencethresthresprobability / / / / / / / /1000 Cisco QoS 11-37

38 3 11 WRED show policy-map interface vlan1 WRED RED WRED Router# show policy-map interface GigabitEthernet 1/0/0 GigabitEthernet1/0/0 Service-policy output: bronze Class-map: vlan1 (match-all) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 101 Output queue: 0/128; 0/0 packets/bytes output, 0 drops Bandwidth: 47 kbps (Weight 0) Random-detect (discard-class-based): Exponential weight: 9 (1/512) Current average queue length: 0 packets DiscardMinMaxMarkRand-DropsTail-Drops classthresthresprobability / / / / / / / /100 0 ATM CLP WRED show policy-map interface PRE3 Cisco ATM CLP WRED CLP ATM CLP WRED PRE3 Router# show policy-map policymap1 Service-policy output: policymap1 Class-map:class1 (match-all) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match:none Queueing Queue limit 50 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0 bandwidth 20% (00000 kbps) Exp-weight-constant: 9 (1/512) Mean queue depth:0 bytes clp Transmitted Random drop Tail drop Minimum Maximum Mark pkts/bytes pkts/bytes pkts/bytes thresh thresh prob 0 0/0 0/0 0/ /0 1 0/0 0/0 0/ / Cisco QoS

39 show policy-map PRE2 Cisco ATM CLP WRED CLP ATM CLP WRED PRE2 Router# show policy-map policymap1 Service-policy output: policymap1 Class-map:class1 (match-all) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match:none Output queue:0/16384; 0/0 packets/bytes output, 0/0 drops Bandwidth : kbps (Weight 20) Random-detect (clp-based) : Exponential weight: 9 (1/512) Current average queue length:0 packets ATM Min Max Mark Rand-Drop Tail-Drop CLP thres thres probability Pkts Bytes Pkts Bytes / / Cisco QoS 11-39

40 ATM VC 2 ATM ATM VC VC queue-depth VC VC Segmentation and Reassembly SAR; VC VC VC VC VC VC VC SAR VC p ATM VBR UBR VC 11-8 ATM ATM VC VC bps VBR , , UBR VC VC p Cisco QoS

41 VC p Class-Based WRED CBWRED Cisco IOS Quality of Service Solutions Configuration Guide Release 12.3 DiffServ WRED DSCP WRED Part 2: Congestion Management > Configuring Weighted Fair Queuing > Class-Based Weighted Fair Queuing Configuration Task List > Configuring Class Policy in the Policy Map > Configuring Class Policy Using WRED Packet Drop Part 3: Congestion Avoidance > Congestion Avoidance Overview > About Random Early Detection Part 3: Congestion Avoidance > Configuring Weighted Random Early Detection DiffServ Compliant Weighted Random Early Detection Release 12.1(5)T DiffServ Compliant Weighted Random Early Detection Release 12.1(5)T Implementing Quality of Service Policies with DSCP DSCP-Compliant WRED ATM Traffic Management, Troubleshooting Output Drops with Priority Queuing Low Latency Queuing Release 12.0S IP to ATM Class of Service, Low Latency Queuing Low Latency Queuing Release 12.0T VBR-nrt VC Cisco IOS Quality of Service Solutions Configuration Guide Release 12.2 Part 7: Quality of Service Solutions > IP to ATM Class of Service Overview > IP to ATM CoS Features VBR-nrt VC WRED Cisco IOS Quality of Service Solutions Configuration Guide Release 12.2 Part 7: Quality of Service Solutions > IP to ATM CoS Overview > IP to ATM CoS Features Part 7: Quality of Service Solutions > Configuring IP to ATM CoS > IP to ATM CoS on a Single ATM VC Configuration Task List Part 7: Quality of Service Solutions > Configuring IP to ATM CoS > Per-VC WFQ and CBWFQ Configuration Task List Cisco QoS 11-41

42 11 Priority Queuing PQ /ATM PVC CBWFQ RED Cisco IOS Quality of Service Solutions Configuration Guide Release 12.2 Part 2: Congestion Management > Congestion Management Overview > Priority Queuing Part 2: Congestion Management > Configuring Priority Queuing Part 2: Congestion Management > Congestion Management Overview > Weighted Fair Queuing > Class-Based Weighted Fair Queuing Part 2: Congestion Management > Configuring Weighted Fair Queuing > Class-Based Weighted Fair Queuing Configuration Task List Release Notes for the Cisco Series Internet Router for Cisco IOS Release 12.0(25)SX New Features in Cisco IOS Release 12.0(25)SX > Random Early Detection with Queue-Limit Cisco QoS