Manually Configuring Interface Subgroups
You can manually configure port channel subgroups to manage the traffic flow on multiple upstream switches.
This action is required for a port channel that connects to multiple upstream switches where CDP is not
configured.
Before You Begin
•
Log in to the CLI in EXEC mode.
•
Configure the port profile for the port channel using the procedure in Connecting to Multiple Upstream
Switches, on page 61.
•
Know the interface range and the subgroup IDs (0 to 31) for traffic to the upstream switches.
Procedure
PurposeCommand or Action
Enters global configuration mode.switch# configure terminal
Step 1
Enters interface configuration mode for the specified
interface range.
switch(config)# interface ethernet
range
Step 2
Manually configures a subgroup to manage traffic for
the upstream switch. Allowable subgroup numbers are
from 0 to 31.
switch(config-if)# sub-group id
number
Step 3
Perform this step for each port connected to an upstream
switch where CDP is not configured.
Repeat Step 2 and 3.
Step 4
(Optional)
Displays the configuration for verification.
switch(config-if)# show interface
ethernet range
Step 5
(Optional)
Saves the change persistently through reboots and
restarts by copying the running configuration to the
startup configuration.
switch(config-if)# copy
running-config startup-config
Step 6
This example shows how to manually configure port channel subgroups for a host in module 3 which has four
physical ports. The upstream switches do not support CDP. Ethernet ports 3/2 and 3/3 connect to one upstream
switch and the Ethernet ports 3/4 and 3/5 connect to another upstream switch.
switch# configure terminal
switch(config)# int eth3/2
switch(config-if)# sub-group-id 0
switch(config-if)# int eth3/3
switch(config-if)# sub-group-id 0
switch(config-if)# int eth3/4
switch(config-if)# sub-group-id 1
switch(config-if)# int eth3/5
switch(config-if)# sub-group-id 1
switch(config-if)# copy running-config interface
. . .
interface Ethernet3/2
Cisco Nexus 1000V for VMware vSphere Interface Configuration Guide, Release 5.x
65
Configuring Port Channels
Creating a Port Profile for a Port Channel
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