Reference Guide

Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.5.1.0 Added support for 4-port 40G line cards on ExaScale.
Version 8.3.7.0 Introduced on the S4810.
Version 8.1.1.0 Introduced on the E-Series ExaScale.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
pre-Version
6.2.1.0
Introduced on the E-Series.
Usage
Information
Use the interface port-channel command to access this command.
You cannot add an interface to a Port Channel if the interface contains an IP address in its
configuration. Only the shutdown, description, mtu, and ip mtu commands can be
configured on an interface if it is added to a Port Channel. The mtu and ip mtu commands
are only available when the chassis is in Jumbo mode.
Link MTU and IP MTU considerations for Port Channels are:
• All members must have the same link MTU value and the same IP MTU value.
• The Port Channel link MTU and IP MTU must be less than or equal to the link MTU and
IP MTU values configured on the channel members. For example, if the members have
a link MTU of 2100 and an IP MTU 2000, the Port Channel’s MTU values cannot be
higher than 2100 for link MTU or 2000 bytes for IP MTU.
When an interface is removed from a Port Channel with the no channel-member
command, the interface reverts to its configuration prior to joining the Port Channel.
An interface can belong to only one Port Channel.
On the E-Series TeraScale, you can add up to 16 interfaces to a Port Channel; E-Series
ExaScale can add up to 64. You can have eight interfaces per Port Channel on the C-Series and
S-Series. The interfaces can be located on different line cards but must be the same physical
type and speed (for example, all 1-Gigabit Ethernet interfaces). However, you can combine
100/1000 interfaces and GE interfaces in the same Port Channel.
If the Port Channel contains a mix of interfaces with 100 Mb/s speed and 1000 Mb/s speed, the
software disables those interfaces whose speed does not match the speed of the first
interface configured and enabled in the Port Channel. If that first interface goes down, the Port
Channel does not change its designated speed; disable and re-enable the Port Channel or
change the order of the channel members configuration to change the designated speed. If the
Port Channel contains a mix of interfaces with 100 Mb/s speed and 1000 Mb/s speed, the
software disables those interfaces whose speed does not match the speed of the first
interface configured and enabled in the Port Channel. If that first interface goes down, the Port
Channel does not change its designated speed; disable and re-enable the Port Channel or
change the order of the channel members configuration to change the designated speed. For
more information about Port Channels, refer to the FTOS Configuration Guide .
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