About Interface Addition To A Portchannel; Compatibility Check; Suspended And Isolated States; Adding An Interface To A Portchannel - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

Chapter 16 Configuring PortChannels
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

About Interface Addition to a PortChannel

You can add a physical interface (or a range of interfaces) to an existing PortChannel. The compatible
parameters on the configuration are mapped to the PortChannel. Adding an interface to a PortChannel
increases the channel size and bandwidth of the PortChannel.
After the members are added, regardless of the mode (ACTIVE and ON) used, the ports at either end are
gracefully brought down, indicating that no frames are lost when the interface is going down (see the
"32-Port Switching Module Configuration Guidelines" section on page 16-2
section on page

Compatibility Check

A compatibility check ensures that the same parameter settings are used in all physical ports in the
channel. Otherwise, they cannot become part of a PortChannel. The compatibility check is performed
before a port is added to the PortChannel.
The check ensures that the following parameters and settings match at both ends of a PortChannel:
•
•
•
A port addition procedure fails if the capability and administrative parameters in the remote switch are
incompatible with the capability and administrative parameters in the local switch. If the compatibility
check is successful, the interfaces are operational and the corresponding compatibility parameter
settings apply to these interfaces.

Suspended and Isolated States

If the operational parameters are incompatible, the compatibility check fails and the interface is placed
in a suspended or isolated state based on the configured mode:
•
•
See the

Adding an Interface to a PortChannel

To add an interface to a PortChannel, follow these steps
Command
Step 1
switch# config t
switch(config)#
OL-16184-01, Cisco MDS SAN-OS Release 3.x
12-12).
Capability parameters (type of interface, Gigabit Ethernet at both ends, or Fibre Channel at both
ends).
Administrative compatibility parameters (speed, mode, port VSAN, allowed VSAN, and port
security).
Operational parameters (speed and remote switch's WWN).
An interface enters the suspended state if the interface is configured in the ON mode.
An interface enters the isolated state if the interface is configured in the ACTIVE mode.
"Reason Codes" section on page 12-8.
Purpose
Enters configuration mode.
Cisco MDS 9000 Family CLI Configuration Guide
Interfaces in a PortChannel
and "Graceful Shutdown"
16-11