Cisco MDS 9000 Series Configuration Manual page 165

Chapter 6 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
Figure 6-8
Channel Group 10
Cisco MDS
Switch A
The channel group numbers are selected dynamically, and as such, the administrative configuration of
the ports forming the channel group at either end are applicable to the newly created channel group. The
channel group number being chosen dynamically may be different across reboots for the same set of
PortChannels based on the order of ports that are initialized in the switch.
Table 6-2
Table 6-2
User-Configured Channel Group
Manually configured by the user.
Member ports cannot participate in autocreation
of channel groups. The autocreation feature
cannot be configured.
You can form the PortChannel with a subset of the
ports in the channel group. Incompatible ports
remain in a suspended or isolated state depending
on the ON or ACTIVE mode configuration.
Any administrative configuration made to the
PortChannel is applied to all ports in the channel
group, and you can save the configuration for the
PortChannel interface.
You can remove any channel group and add
members to a channel group.
Autocreation is not supported as of MDS NX-OS Release 4.1(1b) and later.
Note
OL-19445-02, Cisco MDS NX-OS Release 4.2(x)
Autocreating Channel Groups
Channel Group 20
po10 po20
1 1
2 2
Cisco MDS
Switch B
3 3
4 4
identifies the differences between user-configured and auto-configured channel groups.
Channel Group Configuration Differences
Autocreated Channel Group
Created automatically when compatible links come
up between two compatible switches, if channel
group autocreation is enabled in all ports at both
ends.
None of these ports are members of a
user-configured channel group.
All ports included in the channel group participate
in the PortChannel—no member port becomes
isolated or suspended; instead, the member port is
removed from the channel group when the link is
found to be incompatible.
Any administrative configuration made to the
PortChannel is applied to all ports in the channel
group, but the configurations are saved for the
member ports; no configuration is saved for the
PortChannel interface. You can explicitly convert
this channel group, if required.
You cannot remove a channel group, or add/remove
any of its members. The channel group is removed
when no member ports exist.
Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
PortChannel Protocols
6-17