Configuration manual

Member ports of a LAG are added and programmed into hardware in a predictable order based on the
port ID, instead of in the order in which the ports come up. With this implementation, load balancing
yields predictable results across switch resets and chassis reloads.
A physical interface can belong to only one port channel at a time.
Each port channel must contain interfaces of the same interface type/speed.
Port channels can contain a mix of 1000 or 10000 Mbps Ethernet interfaces . The interface speed (100,
1000, or 10000 Mbps) used by the port channel is determined by the first port channel member that is
physically up. Dell Networking OS disables the interfaces that do not match the interface speed set by the
first channel member. That first interface may be the first interface that is physically brought up or was
physically operating when interfaces were added to the port channel. For example, if the first 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 configured speed different from the port channel speed,
the software disables those interfaces.
The common speed is determined when the port channel is first enabled. At that time, the software
checks the first interface listed in the port channel configuration. If that interface is enabled, its speed
configuration becomes the common speed of the port channel. If the other interfaces configured in that
port channel are configured with a different 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 first interface
specified (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 configured 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 configuration so
the first enabled interface referenced in the configuration 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 configured based on the VLAN
configuration 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 configured based on the server-
facing ports that are members of the LAG.
The untagged VLAN of a server-facing LAG is auto-configured based on the untagged VLAN to which the
lowest numbered server-facing port in the LAG belongs.
Interfaces
103