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How to Configure EtherChannel, Port-Channel or Port Aggregation on Cisco switch?

SpiderTip
SpiderTip
Posted: 2017-10-05

EtherChannel or Port Aggregation is process bundling multiple physical ports into single logical port for higher availability and higher bandwidth. All the ports members must be on the same VLAN, same speed and configuration. To configure EtherChannel on Cisco switch, use the commands below: SW03()#conf t SW03(config)#interface range g0/2-3 SW03(config-if-range)#channel-group 1 mode active This will put gigabit port 1 and 2 into single logical port using LAG mode. Other mode options for ether-channel SW03(config-if-range)#channel-group 1 mode ? active Enable LACP unconditionally auto Enable PAgP only if a PAgP device is detected desirable Enable PAgP unconditionally on Enable Etherchannel only passive Enable LACP only if a LACP device is detected YOu may "Show etherchannel summary" command to display LAG configuration information SW05#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(SU) LACP Fa0/1(P) Fa0/2(P) SW05# or "show etherchannel port-channel" command SW05#show etherchannel port-channel Channel-group listing: ---------------------- Group: 1 ---------- Port-channels in the group: --------------------------- Port-channel: Po1 (Primary Aggregator) ------------ Age of the Port-channel = 02d:05h:02m:14s Logical slot/port = 2/1 Number of ports = 2 GC = 0x00000000 HotStandBy port = null Port state = Port-channel Protocol = LACP Port Security = Disabled Ports in the Port-channel: Index Load Port EC state No of bits ------+------+------+------------------+----------- 0 00 Fa0/1 Active 0 0 00 Fa0/2 Active 0 Time since last port bundled: 00d:05h:25m:38s Fa0/2 SW05#

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