4-22 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
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In Figure 4-5, Secondlev is the second-level virtual interface and is composed of the
two virtual interfaces Firstlev1 and Firstlev2. Firstlev1 is initially the active
interface; if Switch 1 drops both links, Switch2 and Firstlev2 take over and main-
tain the connection to the network.
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You manage virtual interfaces with the vif command. This command enables you to
perform the following actions:
Create either a single-mode or a multiple-mode trunk.
Specify a preferred link to activate in a single-mode trunk.
Add physical interfaces to a trunk.
Display the status of a virtual interface.
Display virtual interface statistics, such as the number of packets received and
transmitted on each link that makes up a virtual interface. You can specify the
time interval, in seconds, at which the statistics are displayed.
Destroy a trunk.
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The following commands are not persistent:
vif add
vif create
vif favor
Put these commands in the /etc/rc file to make them persistent across reboots.
Switch 1 Switch 2 Switch 2
Switch 1
fails
Switch 1
Firstlev1
e0 e1
Firstlev2
e2 e3
Firstlev1
e0 e1
Firstlev2
e2 e3
Secondlev Secondlev