Reference Guide

0 throttles, 0 discarded
Rate info (interval 5 minutes):
Input 00.01Mbits/sec, 2 packets/sec
Output 81.60Mbits/sec, 133658 packets/sec
Time since last interface status change: 04:31:57
FTOS>
When more than one interface is added to a Layer 2-port channel, FTOS selects one of the active interfaces in the port
channel to be the primary port. The primary port replies to flooding and sends protocol data units (PDUs). An asterisk in
the show interfaces port-channel brief command indicates the primary port.
As soon as a physical interface is added to a port channel, the properties of the port channel determine the properties of
the physical interface. The configuration and status of the port channel are also applied to the physical interfaces within
the port channel. For example, if the port channel is in Layer 2 mode, you cannot add an IP address or a static MAC
address to an interface that is part of that port channel. In the following example, interface GigabitEthernet 1/6 is part of
port channel 5, which is in Layer 2 mode, and an error message appeared when an IP address was configured.
Example of Error Due to an Attempt to Configure an Interface that is Part of a Port Channel
FTOS(conf-if-portch)#show config
!
interface Port-channel 5
no ip address
switchport
channel-member GigabitEthernet 1/6
FTOS(conf-if-portch)#int gi 1/6
FTOS(conf-if)#ip address 10.56.4.4 /24
% Error: Port is part of a LAG Gi 1/6.
FTOS(conf-if)#
Reassigning an Interface to a New Port Channel
An interface can be a member of only one port channel. If the interface is a member of a port channel, remove it from
the first port channel and then add it to the second port channel.
Each time you add or remove a channel member from a port channel, FTOS recalculates the hash algorithm for the port
channel.
To reassign an interface to a new port channel, use the following commands.
1. Remove the interface from the first port channel.
INTERFACE PORT-CHANNEL mode
no channel-member interface
2. Change to the second port channel INTERFACE mode.
INTERFACE PORT-CHANNEL mode
interface port-channel id number
3. Add the interface to the second port channel.
INTERFACE PORT-CHANNEL mode
channel-member interface
The following example shows moving the GigabitEthernet 1/8 interface from port channel 4 to port channel 3.
Example of Moving an Interface to a New Port Channel
FTOS(conf-if-portch)#show config
!
interface Port-channel 4
no ip address
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