Service Manual

You cannot add an interface to a Port Channel if the interface contains an IP address in its conguration.
Only the shutdown, description, mtu, and ip mtu commands can be congured 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
congured 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 conguration prior to joining the Port Channel.
An interface can belong to only one Port Channel.
You can have 16 interfaces per Port Channel on the S-Series and Z-Series. The interfaces can be located on
dierent 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 rst interface congured and
enabled in the Port Channel. If that rst 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
conguration 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 rst interface congured and enabled in the Port Channel. If that rst 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 conguration to change the designated speed. For more information about
Port Channels, refer to the Dell Networking OS Conguration Guide.
Related Commands
description — assigns a descriptive text string to the interface.
interface port-channel — creates a Port Channel interface.
shutdown — disables/enables the port channel.
group
Group two LAGs in a supergroup (“fate-sharing group” or “failover group”).
Syntax
group group_number port-channel number port-channel number
To remove an existing LAG supergroup, use the no group group_number command.
Parameters
group_number Enter an integer from 1 to 32 that uniquely identies this LAG fate-sharing group.
port-channel
number
Enter the keywords port-channel then an existing LAG number. Enter this
keyword/variable combination twice, identifying the two paired LAGs.
Defaults none
660
Interfaces