典型的qos设置-ECN+WRED

　　[CODE]

　　policy-map prova-base

　　description This policy allows to apply ECN+WRED at the output queue interface

　　class class-default

　　fair-queue

　　random-detect

　　random-detect ecn

　　random-detect precedence 0 100 300 2 //syntax: precedence min_threshold max_threshold mark_probability_denominator

　　interface ATM1/0/0.200 point-to-point

　　description to ciscotest (shaping)

　　bandwidth 50000

　　ip address 192.168.3.1 255.255.255.248

　　pvc 200/200

　　vbr-nrt 50000 50000 1

　　encapsulation aal5snap

　　!

　　service-policy output prova-base

　　--------------------------------------------------------------

　　dsdeis#sh vers

　　Cisco Internetwork Operating System Software

　　IOS (tm) RSP Software (RSP-PV-M), Version 12.2(6.3)PI, MAINTENANCE INTERIM SOFTWARE

　　TAC Support: http://www.cisco.com/tac

　　Copyright (c) 1986-2001 by cisco Systems, Inc.

　　Compiled Tue 20-Nov-01 18:39 by dchih

　　Image text-base: 0x60010948, data-base: 0x615C0000

　　ROM: System Bootstrap, Version 11.1(2) [nitin 2], RELEASE SOFTWARE (fc1)

　　BOOTLDR: RSP Software (RSP-BOOT-M), Version 12.0(1a), RELEASE SOFTWARE (fc1)

　　dsdeis uptime is 16 weeks, 4 hours, 33 minutes

　　System returned to ROM by reload

　　System restarted at 11:01:54 UTC Fri Nov 30 2001

　　System image file is "tftp://UNKNOWN/rsp-pv-mz.tiziana"

　　cisco RSP2 (R4700) processor with 65536K/2072K bytes of memory.

　　R4700 CPU at 100Mhz, Implementation 33, Rev 1.0

　　Last reset from power-on

　　G.703/E1 software, Version 1.0.

　　G.703/JT2 software, Version 1.0.

　　X.25 software, Version 3.0.0.

　　Chassis Interface.

　　1 VIP2 R5K controller (1 FastEthernet)(1 ATM).

　　1 FastEthernet/IEEE 802.3 interface(s)

　　1 ATM network interface(s)

　　123K bytes of non-volatile configuration memory.

　　20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).

　　8192K bytes of Flash internal SIMM (Sector size 256K).

　　No slave installed in slot 3.

　　Configuration register is 0x102

　　dsdeis#sh pol inter atm 1/0/0.200

　　ATM1/0/0.200

　　Service-policy output: prova-base

　　Class-map: class-default (match-any)

　　0 packets, 0 bytes

　　30 second offered rate 0 bps, drop rate 0 bps

　　Match: any

　　queue size 0, queue limit 724

　　packets output 0, packet drops 0

　　tail/random drops 0, no buffer drops 0, other drops 0

　　Fair-queue: per-flow queue limit 181

　　Random-detect:

　　Exp-weight-constant: 9 (1/512)

　　Mean queue depth: 0

　　Class ECN Random Tail Minimum Maximum Mark Output

　　marked drop drop threshold threshold probability packets

　　0 0 0 0 100 300 1/2 0

　　1 0 0 0 0 0 1/10 0

　　2 0 0 0 0 0 1/10 0

　　3 0 0 0 0 0 1/10 0

　　4 0 0 0 0 0 1/10 0

　　5 0 0 0 0 0 1/10 0

　　6 0 0 0 0 0 1/10 0

　　7 0 0 0 0 0 1/10 0