About Channel Group Creation - Cisco AJ732A - MDS 9134 Fabric Switch Configuration Manual
Cisco nexus 5000 series switch cli software configuration guide, nx-os 4.0(1a)n1 (ol-16597-01, january 2009)
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Port Channel Protocol
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
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About Channel Group Creation
If channel group autocreation is enabled, ISLs can be configured automatically into channel groups
without manual intervention.
The first ISL comes up as an individual link. In the example shown in
When the next link comes up (A2-B2 in the example), the port channel protocol determines if this link
is compatible with link A1-B1 and automatically creates channel groups 10 and 20 in the respective
switches. Link A3-B3 can join the channel groups (and the port channels) if the respective ports have
compatible configurations. Link A4-B4 operates as an individual link, because it is not compatible with
the existing member ports in the channel group.
Figure 36-7
Channel Group 10
Switch A
The channel group numbers are assigned dynamically (when the channel group is formed).
The channel group number may change across reboots for the same set of port channels depending on
the initialization order of the ports.
Table 36-2
Table 36-2
User-Configured Channel Group
Manually configured by the user.
Member ports cannot participate in autocreation
of channel groups. The autocreation feature
cannot be configured.
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
36-12
Autocreation Guidelines, page 36-13
Enabling and Configuring Autocreation, page 36-14
About Manually Configured Channel Groups, page 36-14
Converting to Manually Configured Channel Groups, page 36-14
Figure 36-7
Autocreating Channel Groups
Channel Group 20
po10
po20
1
2
3
4
identifies the differences between user-configured and auto-configured channel groups.
Channel Group Configuration Differences
shows an example of channel group autocreation.
1
2
Switch B
3
4
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.
Chapter 36
Configuring SAN Port Channels
Figure
36-7, this is link A1-B1.
OL-16597-01
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