Users Guide

operational interface in the port channel is a TenGigabit Ethernet interface, all interfaces at 1000 Mbps are kept up, and all
100/1000/10000 interfaces that are not set to 1000 Mbps speed or auto negotiate are disabled.
1GbE and 10GbE Interfaces in Port Channels
When both Gigabit and TenGigabitEthernet interfaces are added to a port channel, the interfaces must share a common speed.
When interfaces have a congured speed dierent from the port channel speed, the software disables those interfaces.
The common speed is determined when the port channel is rst enabled. At that time, the software checks the rst interface listed
in the port channel conguration. If that interface is enabled, its speed conguration becomes the common speed of the port
channel. If the other interfaces congured in that port channel are congured with a dierent speed, Dell Networking OS disables
them.
For example, if four interfaces (TenGig 0/1, 0/2, 0/3 and 0/4) in which TenGig 0/1and TenGig 0/2 are set to speed 1000 Mb/s and
the TenGig 0/3 and TenGig0/4 are set to 10000 Mb/s, with all interfaces enabled, and you add them to a port channel by entering
channel-member tengigabitethernet 0/1-4 while in port channel interface mode, and the Dell Networking OS determines
if the rst interface specied (TenGig 0/0) is up. After it is up, the common speed of the port channel is 1000 Mb/s. Dell Networking
OS disables those interfaces congured with speed 10000 Mb/s or whose speed is 10000 Mb/s as a result of auto-negotiation.
In this example, you can change the common speed of the port channel by changing its conguration so the rst enabled interface
referenced in the conguration is a 1000 Mb/s speed interface. You can also change the common speed of the port channel by
setting the speed of the TenGig 0/1 interface to 1000 Mb/s.
Uplink Port Channel: VLAN Membership
The tagged VLAN membership of the uplink LAG is automatically congured based on the VLAN conguration of all server-facing
ports (ports 1 to 32).
The untagged VLAN used for the uplink LAG is always the default VLAN 1.
Server-Facing Port Channel: VLAN Membership
The tagged VLAN membership of a server-facing LAG is automatically congured based on the server-facing ports that are
members of the LAG.
The untagged VLAN of a server-facing LAG is auto-congured based on the untagged VLAN to which the lowest numbered server-
facing port in the LAG belongs.
Displaying Port Channel Information
To view the port channel’s status and channel members in a tabular format, use the show interfaces port-channel
brief command in EXEC Privilege mode.
Dell#show int port brief
Codes: L - LACP Port-channel
LAG Mode Status Uptime Ports
1 L2 down 00:00:00 Te 0/16 (Down)
Dell#
To display detailed information on a port channel, enter the show interfaces port-channel command in EXEC Privilege mode. The
below example shows the port channel’s mode (L2 for Layer 2, 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.
In this example, the Port-channel 1 is a dynamically created port channel based on the NIC teaming conguration in connected
servers learned via LACP. Also, the Port-channel 128 is the default port channel to which all the uplink ports are assigned by default.
Dell#show interface port-channel
Port-channel 1 is up, line protocol is up
Created by LACP protocol
Hardware address is 00:1e:c9:f1:03:58, Current address is 00:1e:c9:f1:03:58
Interface index is 1107755009
Interfaces
101