Generic Frame-Relay interface question/lab strategy

Hello All,

I have a generic strategy/opinion on frame relay interfaces:

When working through different labs or config examples on cisco - I more
often than not see physical interfaces configured with frame-relay map OR
frame-relay interface-dlci commands - when configuring neither seems to work
just fine.

So I understand frame-rely map gives you a static mapping and frees you from
using inverse arp. I also understand that using frame-relay interface-dlci
can be used for say FRTS to put a class command underneath, and of course on
sub-interfaces says "this dlci goes here".

However on physical interfaces - when no requirement is given - does anyone
see any issue using neither - since by default all DLCIs are mapped to the
physical interface, and letting inverse arp do it's thing?

Just wondering if there is some gotcha/reason I should use say frame-relay
maps every time even when not stated as some requirement....the only reason
I ask is because I see it used so frequently when it seems to work as
expected without.

Thanks!

Dave

Blogs and organic groups at http://www.ccie.net
Received on Sun Nov 21 2010 - 16:24:15 ART