3550解決掉策略路由的方法

1、policy routing with catalyst 3550 series switch configuration exampledownloadspolicy routing with catalyst 3550 scries switch configuration examplendocument id: 47900contentsintroductionprerequisitesrequirementscomponents usedconventionsconfigurenetwork diagramconfigurationsverifytroubleshoottrouble

2、shooting commandsnetpro discussion forums - featured conversationsrelated informationintroduct ionthis document provides a sample configuration for policy routing oncatalyst 3550 series switches you must modify the switch database management(sdm) template to enable the switch to support the 144-bit

3、layer 3 ternary content addressable memory (tcam) before you can configure policy routing. refer to understand and configure theswitching database manager on catalyst 3550 series switches more information about sdm.note: the catalyst 3550 has 1imitations on theroute-maps commands you can use.prerequ

4、isitesrequirementsbefore at tempting t hi s conf igu" tion, en sure that you are knowledgeable of these:configuring卩olicy-bascd routingunsupportedroute map commandsoverview of theswitching database managercomponents usedthe information in this document is based on these software and hardware ve

5、rsions:cisco ios® software release 12.1. 19-ealacisco catalyst 3550the information in this document was created from the devices in aspecific lab environment> all of the devices used in this document started witha cleared (default) configuration. if your network is live, make sure thatyouund

6、erstand the potential impact of any command.conventionsfor more information on document conventions, refer tocisco technical tipsconvent ions.configuretn this section,you are presented withthe information to configuredocument.the features described in thisnote: to find additional information on the

7、commands used in this documenl, use thecommand lookup tool(regi steredcustomers only)before you can enable policy routing, you must configure one of thesecommands in the global configuration mode, and then the configuration must bewritten and the switch reloaded:sdm preferextended-matchsdm prefer ac

8、cessextended-matchsdm prefer :routingextended-matchcat3550(config)# access-list 10 permit 20. 20. 20. 0 0. 0. 0. 255cat3550(config)# route-map pbr permit 10cat3550(config-route-map)# match ip address 10cat3550(config-routemap)# set ip next-hop 12. 12. 12. 12cat3550(config)# int vlan 3cat3550(config-

9、if)# ip policy route-map pbrcat3550(config-if)#06:12:31: %l3tcam-3-size_conflict: pbr requires enabling extended routingcat3550# show run int vlan 3bui 1 ding configuration.current configuration : 60 bytesiinterface vlan3ip address 255. 255. 255. 0color=#0000ff!command not taken 一 you nee

10、d to enable sdmenclcat3550# conf tenter configuration commands, one per line. end with cntl/zcat3550(config)# sdm prefer extended-matchchanges to the running sdm preferences have been stored, but cannot take effect until the next reload.use 1 show sdm prefer" to see what sdm preference is curre

11、ntly active.cat3550(config)# endcat3550# write06:14:11: %sys-5-config i: configured from console by consolebuilding configuration 0kltd-1-2# reloadproceed with reload? confirmyou should be aware of unsupported commandsrefer tounsupportedroute map commands if this configuration exists:access-list 10

12、permit 20. 20. 20. 0 0. 0. 0. 255route-map pbr permit 10match ip address 10set ip default next-hop 12.12. 12. 12an error message is generated if you try to configure the policy routemap on the interface:cat3550(config)# int vlan 3cat3550(config-if) # ip policy route-map pbrcat3550(config-if)# endcat

13、3550#00:02:29: %pbr-3-unsupp0rted_rmap: route-map pbr not supported for policy-based routingnetwork diagramthis document uses this network setup:workstation ae0 /24conf igurationsthis document uses this configuration:cat3550the configuration takes traffic source from 2020. 20. x (access-li

14、st 10)and sends it to 30. 30. 30. 2一the configuration overrides the default gateway setto 10. 10. 10. 2.cat3550 (cisco catalyst 3550)cat3550# show running-configbuilding configuration interface vlanlip address 10. 10. 10. 1 iinterface vlan2ip address 20. 20. 20. 1 255. 255. 255. 0ip po

15、licy route-map pbrii nterface vian3ip address 30. 30. 30. 1 iip route 0. 0. 0. 0 0. 0. 0. 0 10. 10. 10. 2ip classlessip http server access-list 10 permi t 20. 20. 20. 0 0. 0. 0. 255 route-map pbr permit 10match ip address 10set ip next-hop endverifythere is currently no veri

16、fication procedure available for this configuration.troubleshootthis section provides information you can use to troubleshoot your configuration.troubleshooting commandscertain show commands are supported by theoutput interpreter tool(registeredcustomers only),which allows you to view an analysis of

17、 show command output.note: before issuing debug commands, refer toimportant infornuition ondebug commands.debug ip policyshows packets that arepolicy routcd，or 'policy rejected".an example of thedebug ippolicy commandoutput is:wee 5 13:33:23. 607: ip: s二20. 20 20. 3 (vlan2), cl二200. 200. 20

18、0. 4, len 100, policy match*dec 5 13:33:23. 607: tp: route map pbr, item 10, permit*dec 5 13:33:23.607: tp: s=20. 20. 20. 3 (vlan2), d=200. 200. 200. 4 (vlan3), len 100, policy routed*dec 5 13:33:23. 607: tp: vlan2 to vlan3 *dec 5 13:33:23. 707: ip: s二20. 20. 20. 3 (vlan2), 2, len 100, policy match*dec 5 13:33:23. 707: tp: route map pbr, itern 10, permit*dec 5 13:33: