本文提供了 Catalyst 5500 和 Catalyst 5000 交换机(都运行 Catalyst OS (CatOS))之间的 Inter-Switch Link (ISL) 配置示例。 所有运行 CatOS 的 Catalyst 5000 或 6000 系列成员可以用于此方案,以获得相同结果。
简单来说,中继是一种在两个设备之间点对点链路上传输来自若干 VLAN 的流量的方式。实施以太网中继的方法有如下两种:
ISL(Cisco 专有 Inter-Switch 链路协议)
802.1Q(IEEE 标准)
本文档仅显示交换机的配置文件,以及相关 show 命令示例的输出。有关怎样在 Catalyst 交换机之间配置 ISL 中继的详细信息,请参阅在 Catalyst 5500/5000 和 6500/6000的ISL 系列交换机上配置 ISL 中继。
本文档没有任何特定的要求。
本文档中的信息基于以下软件和硬件版本:
运行 Catalyst OS 6.1(1) 软件的 Catalyst 5500 交换机
运行 Catalyst OS 6.1(1) 软件的 Catalyst 5000 交换机
本文档中的信息都是基于特定实验室环境中的设备编写的。如果您使用的是真实网络,请确保您已经了解所有命令的潜在影响。用clear config all和write erase命令清除所有设备的配置,以保证它们有一个默认配置。
有关文件规则的更多信息请参见“ Cisco技术提示规则”。
运行 CatOS 的 Catalyst 4000 系列(包括 Catalyst 2948G 及 Catalyst 2980G)只支持 802.1Q 中继,不支持 ISL 中继。
Catalyst 6000 系列的所有以太网端口都支持 802.1Q 和 ISL 封装。
根据模块,支持 Catalyst 5000 中继的端口只支持 ISL 封装,或同时支持 ISL 和 802.1Q。验证这一点的最佳方式是发出 show port capabilities 命令。明确地陈述了中继容量。例如:
cat5000> show port capabilities 3 Model WS-X5225R Port 3/1 Type 10/100BaseTX Speed auto,10,100 Duplex half,full Trunk encap type 802.1Q,ISL Trunk mode on,off,desirable,auto,nonegotiate Channel 3/1-2,3/1-4 Broadcast suppression percentage(0-100) Flow control receive-(off,on),send-(off,on) Security yes Membership static,dynamic Fast start yes QOS scheduling rx-(none),tx-(none) CoS rewrite yes ToS rewrite IP-Precedence Rewrite no UDLD yes AuxiliaryVlan 1..1000,1025..4094,untagged,dot1p,none SPAN source,destination
确保整个中继链路范围内的中继模式匹配。如果链路的一端配置为 ISL中继,那么链路的另一端也应该配置为 ISL;同样地,如果链路一端配置为 802.1Q,那么链路另一端应该配置为 802.1Q。
本部分提供有关如何配置本文档所述功能的信息。
注:要查找有关本文档中使用的命令的其他信息,请使用命令查找工具(仅注册客户)。
本文档使用以下网络设置:
本文档使用以下配置:
Catalyst 5500 |
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#version 6.1(1) ! set option fddi-user-pri enabled set password $2$q.J7$O5n.pwx7aEC6NHWJfXadx1 set enablepass $2$o.h/$bAxfjJ4XUA/RMUHqBr1YQ0 ! #errordetection set errordetection portcounter enable ! #system set system name cat5500 ! #frame distribution method set port channel all distribution mac both ! #vtp !--- In this example, the VLAN Trunking Protocol (VTP) mode is set to be transparent. !--- Depending on your network, set the VTP mode accordingly. set vtp mode transparent !--- For details on VTP, refer to Configuring VTP. set vlan 1 name default type ethernet mtu 1500 said 100001 state active set vlan 1002 name fddi-default type fddi mtu 1500 said 101002 state active set vlan 1004 name fddinet-default type fddinet mtu 1500 said 101004 state active stp ieee set vlan 1005 name trnet-default type trbrf mtu 1500 said 101005 state active stp ibm set vlan 2 set vlan 1003 name token-ring-default type trcrf mtu 1500 said 101003 state acti ve mode srb aremaxhop 7 stemaxhop 7 backupcrf off ! #ip !--- IP address used for management. set interface sc0 1 10.10.10.2/255.255.255.0 10.10.10.255 ! #set boot command set boot config-register 0x2102 set boot system flash slot0:cat5000-sup3.6-1-1.bin ! # default port status is enable ! ! #module 1 empty ! #module 2 : 2-port 1000BaseSX Supervisor ! #module 3 empty ! #module 4 : 24-port 10/100BaseTX Ethernet !--- Ports 4/13-24 are assigned to VLAN 2. set vlan 2 4/13-24 !--- The ISL trunking mode is set to on. !--- Depending on your network and requirements, set the trunking mode accordingly. set trunk 4/1 on isl 1-1005 !--- For details on different trunking modes, refer to !--- Configuring VLAN Trunks on Fast Ethernet and Gigabit Ethernet Ports !--- Portfast has been enabled on the ports connected to the workstations. set spantree portfast 4/2-24 enable !--- For details on why to enable portfast, refer to !--- Using Portfast and Other Commands to Fix Workstation Startup Connectivity Delays ! #module 5 empty ! #module 6 empty ! #module 7 empty ! #module 8 empty ! #module 9 empty ! #module 10 empty ! #module 11 empty ! #module 12 empty ! #module 13 empty end |
Catalyst 5000 |
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#Version 6.1(1) ! set option fddi-user-pri enabled set password $2$J75L$Ug4163kfeHTDcLJZ/L9es1 set enablepass $2$h/BN$i3S54iNvIXknFelh6gOve0 ! #errordetection set errordetection portcounter enable ! #system set system name cat5000 ! #frame distribution method set port channel all distribution Mac both ! #vtp !--- In this example, the VTP mode is set to be transparent. !--- Depending on your network and requirements, set the VTP mode accordingly. set vtp mode transparent !--- For details on VTP, refer to Configuring VTP. set vlan 1 name default type ethernet mtu 1500 said 100001 state active set vlan 1002 name fddi-default type fddi mtu 1500 said 101002 state active set vlan 1004 name fddinet-default type fddinet mtu 1500 said 101004 state active stp IEEE set vlan 1005 name trnet-default type trbrf mtu 1500 said 101005 state active stp IBM set vlan 2 set vlan 1003 name token-ring-default type trcrf mtu 1500 said 101003 state acti ve mode srb aremaxhop 7 stemaxhop 7 backupcrf off ! #ip !--- IP address used for management. set interface sc0 1 10.10.10.3/255.255.255.0 10.10.10.255 ! #set boot command set boot config-register 0x2102 set boot system flash slot0:cat5000-sup3.6-1-1.bin ! # default port status is enable ! ! #module 1 : 0-port Supervisor III ! #module 2 : 12-port 10/100BaseTX Ethernet ! #module 3 : 24-port 10/100BaseTX Ethernet !--- Ports 3/13-24 have been assigned to VLAN 2. set vlan 2 3/13-24 !--- The ISL trunking mode is set to on. !--- Depending on your network and requirements, set the trunking mode accordingly. set trunk 3/1 on isl 1-1005 !--- For details on different trunking modes, refer to !--- Configuring VLAN Trunks on Fast Ethernet and Gigabit Ethernet Ports !--- Portfast has been enabled on the ports connected to the workstations. set spantree portfast 3/2-24 enable !--- For details on why to enable portfast, refer to !--- Using Portfast and Other Commands to Fix Workstation Startup Connectivity Delays ! ! #module 4 : 24-port 10/100BaseTX Ethernet ! #module 5 : 12-port 10BaseFL Ethernet end |
本部分所提供的信息可用于确认您的配置是否正常工作。
命令输出解释程序工具(仅限注册用户)支持某些 show 命令(尤其是 show tech-support ),使用此工具可以查看对 show 命令输出的分析。
show port capabilities module/port — 此命令用于验证端口是否可以进行中继。
cat5500> (enable) show port capabilities 4/1 Model WS-X5234 Port 4/1 Type 10/100BaseTX Speed auto,10,100 Duplex half,full Trunk encap type 802.1Q,ISL Trunk mode on,off,desirable,auto,nonegotiate Channel 4/1-2,4/1-4 Broadcast suppression percentage(0-100) Flow control receive-(off,on),send-(off,on) Security yes Membership static,dynamic Fast start yes QOS scheduling rx-(none),TX(1q4t) COs rewrite yes ToS rewrite IP-Precedence Rewrite no UDLD yes AuxiliaryVlan 1..1000,1025..4094,untagged,dot1p,none SPAN source,destination
show port module/port — 此命令用于确定特定端口的状态以及端口是否正在中继。
cat5500> (enable) show port 4/1 Port Name Status Vlan Level Duplex Speed Type ----- ------------------ ---------- ---------- ------ ------ ----- ------------ 4/1 connected trunk normal a-full a-100 10/100BaseTX Port AuxiliaryVlan AuxVlan-Status ----- ------------- -------------- 4/1 none none Port Security Violation Shutdown-Time Age-Time Max-Addr Trap IfIndex ----- -------- --------- ------------- -------- -------- -------- ------- 4/1 disabled shutdown 0 0 1 disabled 11 Port Num-Addr Secure-Src-Addr Age-Left Last-Src-Addr Shutdown/Time-Left ----- -------- ----------------- -------- ----------------- ------------------ 4/1 0 - - - - - !--- Output suppressed.
show trunk — 此命令用于验证中继状态和配置。
cat5500> (enable) show trunk * - indicates vtp domain mismatch Port Mode Encapsulation Status Native vlan -------- ----------- ------------- ------------ ----------- 4/1 on isl trunking 1 Port Vlans allowed on trunk -------- --------------------------------------------------------------------- 4/1 1-1005 Port Vlans allowed and active in management domain -------- --------------------------------------------------------------------- 4/1 1-2 Port Vlans in spanning tree forwarding state and not pruned -------- --------------------------------------------------------------------- 4/1 1-2
show vtp domain — 此命令用于检查 VTP 信息。
cat5500> (enable) show vtp domain Domain Name Domain Index VTP Version Local Mode Password -------------------------------- ------------ ----------- ----------- ---------- 1 2 Transparent - Vlan-count Max-vlan-storage Config Revision Notifications ---------- ---------------- --------------- ------------- 6 1023 0 disabled Last Updater V2 Mode Pruning PruneEligible on Vlans --------------- -------- -------- ------------------------- 10.10.10.2 disabled disabled 2-1000
show port capabilities module/port — 此命令用于验证端口是否可以进行中继。
cat5000> (enable) show port capabilities 3/1 Model WS-X5225R Port 3/1 Type 10/100BaseTX Speed auto,10,100 Duplex half,full Trunk encap type 802.1Q,ISL Trunk mode on,off,desirable,auto,nonegotiate Channel 3/1-2,3/1-4 Broadcast suppression percentage(0-100) Flow control receive-(off,on),send-(off,on) Security yes Membership static,dynamic Fast start yes QOS scheduling rx-(none),TX(none) COs rewrite yes ToS rewrite IP-Precedence Rewrite no UDLD yes AuxiliaryVlan 1..1000,1025..4094,untagged,dot1p,none SPAN source,destination
show port module/port — 此命令用于确定特定端口的状态以及端口是否正在中继。
cat5000> (enable) show port 3/1 Port Name Status Vlan Level Duplex Speed Type ----- ------------------ ---------- ---------- ------ ------ ----- ------------ 3/1 connected trunk normal a-full a-100 10/100BaseTX Port AuxiliaryVlan AuxVlan-Status ----- ------------- -------------- 3/1 none none Port Security Violation Shutdown-Time Age-Time Max-Addr Trap IfIndex ----- -------- --------- ------------- -------- -------- -------- ------- 3/1 disabled shutdown 0 0 1 disabled 57 !--- Output suppressed.
show trunk — 此命令用于验证中继状态和配置。
cat5000> (enable) show trunk * - indicates vtp domain mismatch Port Mode Encapsulation Status Native vlan -------- ----------- ------------- ------------ ----------- 3/1 on isl trunking 1 Port Vlans allowed on trunk -------- --------------------------------------------------------------------- 3/1 1-1005 Port Vlans allowed and active in management domain -------- --------------------------------------------------------------------- 3/1 1-2 Port Vlans in spanning tree forwarding state and not pruned -------- --------------------------------------------------------------------- 3/1 1-2
show vtp domain — 此命令用于检查 VTP 信息。
cat5000> (enable) show vtp domain Domain Name Domain Index VTP Version Local Mode Password -------------------------------- ------------ ----------- ----------- ---------- 1 2 Transparent - Vlan-count Max-vlan-storage Config Revision Notifications ---------- ---------------- --------------- ------------- 6 1023 0 disabled Last Updater V2 Mode Pruning PruneEligible on Vlans --------------- -------- -------- ------------------------- 10.10.10.3 disabled disabled 2-1000
目前没有针对此配置的故障排除信息。