Chaparral FS2620R - Manual (Page 44)

FS2620R Rack Model User’s Guide
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3 Select the FC channel you want to configure and press Enter.
The Enabled/Disabled screen displays with the current setting marked
with an *.
4 Select Enabled or Disabled and press Enter.
If you are not using one channel, you should disable it. If you do not, performance
will be slower because the router will continue to try to acquire a link to it.
The Topology screen displays with the current setting marked with an *.