From: Edward Balow (ebalow@hotmail.com)
Date: Sat Mar 08 2008 - 14:30:40 ARST
If you are using a backup interface using the backup command, you'll need to
use a sub-interface. This is because a main interface does not go down if the
DLCI goes down, however a subinterface does. And if you need to ensure
connectivity exists across the frame-relay circuit, you'll need to use
end-to-end keepalives as well.
I personally always like to set it up this way when permitted, becuase then to
test fail-over I can shut down the remote end of the frame-relay circuit and
watch everything reconverge.> Date: Sat, 8 Mar 2008 14:29:04 +0000> From:
ccieaz@googlemail.com> To: ccielab@groupstudy.com> Subject: Frame Relay Sub
Interfaces> > Hi,> > I am working my way through IE WB 1, currently I am on
the BGP section> (page 21). For the frame relay connection between R2 and R5 i
did not> use a sub interface as there is no mention to this on the>
instructions. But the solution has a sub-interface configured.> > My question
is, in the lab is it best practice to use sub interfaces> when ever your are
configuring a frame relay link?> > Thanks> > Az> >
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