Chapter 11
| Link Aggregation Commands
Dynamic Configuration Commands
– 367 –
Command Usage
â—† The ports on both ends of an LACP trunk must be configured for full duplex,
either by forced mode or auto-negotiation.
â—† A trunk formed with another switch using LACP will automatically be assigned
the next available port-channel ID.
â—† If the target switch has also enabled LACP on the connected ports, the trunk
will be activated automatically.
â—† If more than eight ports attached to the same target switch have LACP enabled,
the additional ports will be placed in standby mode, and will only be enabled if
one of the active links fails.
Example
The following shows LACP enabled on ports 10-12. Because LACP has also been
enabled on the ports at the other end of the links, the show interfaces status port-
channel 1 command shows that Trunk1 has been established.
Console(config)#interface ethernet 1/10
Console(config-if)#lacp
Console(config-if)#interface ethernet 1/11
Console(config-if)#lacp
Console(config-if)#interface ethernet 1/12
Console(config-if)#lacp
Console(config-if)#end
Console#show interfaces status port-channel 1
Information of Trunk 1
Port Type : 1000BASE-T
MAC Address : 00-00-00-00-00-03
Configuration:
Name :
Port Admin : Up
Speed-duplex : Auto
Capabilities : 10half, 10full, 100half, 100full, 1000full
Broadcast Storm : Enabled
Broadcast Storm Limit : 64 Kbits/second
Multicast Storm : Disabled
Multicast Storm Limit : 64 Kbits/second
Unknown Unicast Storm : Disabled
Unknown Unicast Storm Limit : 64 Kbits/second
Flow Control : Disabled
VLAN Trunking : Disabled
Current Status:
Created By : LACP
Link Status : Up
Port Operation Status : Up
Operation Speed-duplex : 1000full
Up Time : 0w 0d 0h 0m 48s (48 seconds)
Flow Control Type : None
Max Frame Size : 0 bytes (0 bytes for tagged frames)
Member Ports : Eth1/10, Eth1/11, Eth1/12,
Console#