Deleting Interfaces From A Portchannel; Portchannel Configuration Guidelines; Error Detection - Cisco DS-X9530-SF1-K9 - Supervisor-1 Module - Control Processor Configuration Manual

Chapter 13 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 .

Deleting Interfaces from a PortChannel

When a physical interface is deleted from the PortChannel, the channel membership is automatically
updated. If the deleted interface is the last operational interface, then the PortChannel status is changed
to a down state. Deleting an interface from a PortChannel decreases the channel size and bandwidth of
the PortChannel.
•
•
After the members are deleted, 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
"Graceful Shut Down" section on page
To delete a physical interface (or a range of physical interfaces), follow these steps:
Command
Step 1
switch(config)# interface fc1/1
switch(config-if)#
switch(config)# interface fc1/1 - 5
switch(config-if)#
Step 2
switch(config-if)# no channel-group 2
fc1/1 fc1/2 fc1/3 fc1/4 fc1/5 removed
from port-channel 2 and disabled. Please
do the same operation on the switch at
the other end of the port-channel
switch(config-if)#

PortChannel Configuration Guidelines

Before configuring a PortChannel, consider the following guidelines
•
•

Error Detection

If you misconfigure PortChannels, you may receive a misconfiguration message. If you receive this
message, the PortChannel's physical links are disabled since an error has been detected.
A PortChannel error is detected if the following requirements are not met:
•
•
•
If all three conditions are not met, the faulty link is disabled.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
If you use the default ON mode, to avoid inconsistent states across switches, and to maintain
consistency across switches, the ports shut down. You must explicitly enable those ports again.
If you use the ACTIVE mode, the PortChannel ports automatically recover from the deletion.
Configure the PortChannel across switching modules to prevent redundancy on switching module
reboots or upgrades.
Ensure that one PortChannel is not connected to different sets of switches. PortChannels require
point-to-point connections between the same set of switches.
Each switch on either side of a PortChannel must be connected to the same number of interfaces.
Each interface must be connected to a corresponding interface on the other side (see the
Configuration Examples" section on page
Links in a PortChannel cannot be changed after the PortChannel is configured. If you change the
links after the PortChannel is configured, be sure to reconnect the links to interfaces within the
PortChannel and re-enable the links.
11-9).
Purpose
Enters the selected physical interface level.
Enters the selected range of physical interfaces.
Deletes the physical Fibre Channel interfaces in
channel group 2.
13-13).
Cisco MDS 9000 Family Configuration Guide
Deleting Interfaces from a PortChannel
"Invalid
13-11