Compatibility Requirements - Cisco nexus 5000 series Cli Configuration Manual

Information About Port Channels
S e n d f e e d b a c k t o n x 5 0 0 0 - d o c f e e d b a c k @ c i s c o . c o m
You can collect up to eight ports into a static port channel or you can enable the Link Aggregation
Control Protocol (LACP). Configuring port channels with LACP requires slightly different steps than
configuring static port channels (see the
Note Cisco NX-OS does not support Port Aggregation Protocol (PAgP) for port channels.
A port channel bundles individual links into a channel group to create a single logical link that provides
the aggregate bandwidth of up to eight physical links. If a member port within a port channel fails, traffic
previously carried over the failed link switches to the remaining member ports within the port channel.
Each port can be in only one port channel. All the ports in a port channel must be compatible; they must
use the same speed and operate in full-duplex mode (see the
page
on channel mode; you cannot change this mode without enabling LACP (see the
section on page
Note You cannot change the mode from ON to Active or from ON to Passive.
You can create a port channel directly by creating the port-channel interface, or you can create a channel
group that acts to aggregate individual ports into a bundle. When you associate an interface with a
channel group, Cisco NX-OS creates a matching port channel automatically if the port channel does not
already exist. You can also create the port channel first. In this instance, Cisco NX-OS creates an empty
channel group with the same channel number as the port channel and takes the default configuration.
The port channel is operationally up when at least one of the member ports is up and that port's status is
Note
channeling. The port channel is operationally down when all member ports are operationally down.

Compatibility Requirements

When you add an interface to a channel group, the Cisco NX-OS checks certain interface attributes to
ensure that the interface is compatible with the channel group. The Cisco NX-OS also checks a number
of operational attributes for an interface before allowing that interface to participate in the port-channel
aggregation.
The compatibility check includes the following operational attributes:
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Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
1-2
1-2). When you are running static port channels, without LACP, the individual links are all in the
1-6).
Port mode
Access VLAN
Trunk native VLAN
Allowed VLAN list
Speed
802.3x flow control setting
MTU
This attribute is strictly not applicable as the Cisco Nexus 5000 Series switch only supports system
level MTU.
Broadcast/Unicast/Multicast Storm Control setting
"Configuring Port Channels" section on page
"Compatibility Requirements" section on
Chapter 1 Configuring Port Channels
1-7).
"Port-Channel Modes"
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