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2010-07-14 12:01:53
实验目的:
1、掌握其于Cisco私有的LACP的链路聚合协议的配置方法。
2、掌握第二层与第三层的LACP配置区别。
3、LACP为公开标准链路聚合协议。
实验拓扑图:
实验步骤及要求:
1、本实验使用两台Cisco Catalyst 3750交换机。并按照拓扑连接相应的交换机的线缆。
2、为了能够保证实验成功,因此建议将Fa1/0/1 – 22号接口置为shutdown状态。
3、由于LACP的工作特性与PAgP非常相似,因此本次实验仅列出LACP的配置命令,具体解释请参看实验:Configuring L2 & L3 EtherChannel with LAC一节。
4、首先在SW1和SW2交换机上配置第二层的LACP的链路聚合:
SW1(config)#interface range fastEthernet 1/0/23 - 24 SW1(config-if-range)#channel-protocol lacp SW1(config-if-range)#channel-group 1 mode active Creating a port-channel interface Port-channel 1 SW1(config-if-range)#exit |
SW2(config)#interface range fastEthernet 1/0/23 - 24 SW2(config-if-range)#channel-protocol lacp SW2(config-if-range)#channel-group 1 mode passive SW2(config-if-range)#exit |
5、查看SW1或SW2的LACP汇总信息:
SW1#show etherchannel summary Flags: D - down P - in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 U - in use f - failed to allocate aggregator u - unsuitable for bundling w - waiting to be aggregated d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+----------------------------------------------- SW1# |
5、在两台交换机配置VLAN 1的IP地址,用于测试,并且建议各位使用扩展的ping命令去测试聚合链路的容错:
SW1(config)#interface vlan 1 SW1(config-if)#ip address 192.168.1.1 255.255.255.0 SW1(config-if)#no shutdown SW1(config-if)#exit SW1(config)# |
SW2(config)#interface vlan 1 SW2(config-if)#ip address 192.168.1.2 255.255.255.0 SW2(config-if)#no shutdown SW2(config-if)#exit |
Ping的命令信息如下:
SW1#ping 192.168.1.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms SW1# |
6、删除之前的第二层的LACP的配置或重启交换机。
7、在两台交换机配置第三层的LACP的链路聚合:
SW1(config)#interface port-channel 1 SW1(config-if)#no switchport SW1(config-if)#ip address 192.168.1.1 255.255.255.0 SW1(config-if)#no shutdown SW1(config-if)#exit SW1(config)# SW1(config)#interface range fastEthernet 1/0/23 - 24 SW1(config-if-range)#no switchport SW1(config-if-range)#channel-protocol lacp SW1(config-if-range)#channel-group 1 mode active SW1(config-if-range)#exit |
SW2(config)#interface port-channel 1 SW2(config-if)#no switchport SW2(config-if)#ip address 192.168.1.2 255.255.255.0 SW2(config-if)#no shutdown SW2(config-if)#exit SW2(config)# SW2(config)#interface range fastEthernet 1/0/23 - 24 SW2(config-if-range)#no switchport SW2(config-if-range)#channel-protocol lacp SW2(config-if-range)# SW2(config-if-range)#channel-group 1 mode passive SW2(config-if-range)#exit SW2(config)#exit |
8、查看聚合链路的汇总信息:
SW2#show etherchannel summary Flags: D - down P - in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 U - in use f - failed to allocate aggregator u - unsuitable for bundling w - waiting to be aggregated d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+----------------------------------------------- SW2# |
SW1#show etherchannel summary Flags: D - down P - in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 U - in use f - failed to allocate aggregator u - unsuitable for bundling w - waiting to be aggregated d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+----------------------------------------------- 1 Po1(RU) LACP Fa1/0/23(P) Fa1/0/24(P) SW1# |
9、使用ping命令测试:
SW2#ping 192.168.1.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms SW2# |
10、实验完成。
第二层的LACP聚合。
R关键字指示出当前聚合为三层链路聚合。