486 | Interfaces
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You can add any physical interface to a port channel if the interface configuration is minimal. Only the
following commands can be configured on an interface if it is a member of a port channel:
•
description
•
shutdown/no shutdown
• mtu
• ip mtu (if the interface is on a Jumbo-enabled by default.)
To view the interface’s configuration, enter the INTERFACE mode for that interface and enter the
show
config
command or from the EXEC Privilege mode, enter the show running-config interface interface
command.
When an interface is added to a port channel, FTOS recalculates the hash algorithm.
To add a physical interface to a port channel, use these commands in the following sequence in the
INTERFACE mode of a port channel:
To view the port channel’s status and channel members in a tabular format, use the
show interfaces
port-channel brief
command in the EXEC Privilege mode, as shown in the following example.
FTOS#show int port brief
LAG Mode Status Uptime Ports
1 L2L3 up 00:06:03 Gi 13/6 (Up) *
Gi 13/12 (Up)
2 L2L3 up 00:06:03 Gi 13/7 (Up) *
Gi 13/8 (Up)
Gi 13/13 (Up)
Gi 13/14 (Up)
FTOS#
The example below displays the port channel’s mode (L2 for Layer 2 and L3 for Layer 3 and L2L3 for a
Layer 2 port channel assigned to a routed VLAN), the status, and the number of interfaces belonging to the
port channel.
FTOS>show interface port-channel 20
Port-channel 20 is up, line protocol is up
Note: The S-Series supports jumbo frames by default (the default maximum transmission unit (MTU) is
1554 bytes) You can configure the MTU using the
mtu command from INTERFACE mode.
Step Command Syntax Command Mode Purpose
1
channel-member interface
INTERFACE
PORT-CHANNEL
Add the interface to a port channel.
The interface variable is the physical interface
type and slot/port information.
2
show config
INTERFACE
PORT-CHANNEL
Double check that the interface was added to
the port channel.
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