Interface-dlci Vs frame-relay maps ??

From: Navin MS (navin_ms07@yahoo.com)
Date: Wed Jun 07 2006 - 23:32:32 ART


Hi Group,

Though I've done a couple of labs by now, this one is still lingering in my mind.

What is the difference between using two "frame-relay interface-dlci ..." interfaces and using two
"frame-relay map ip ..." commands on a point-to-multipoint sub-interface ? When should we use each
one, if there is nothing explicitly stated on the lab question ?

interface Serial3/1.301 multipoint
 ip address 172.16.1.3 255.255.255.248
 frame-relay interface-dlci 301
 frame-relay interface-dlci 302

and ...

interface Serial3/1.301 multipoint
 ip address 172.16.1.3 255.255.255.248
 frame-relay map ip 172.16.1.1 301 broadcast
 frame-relay map ip 172.16.1.2 302 broadcast

To my understanding, "frame-relay interface-dlci" doesn't disable Inverse-ARP and so a remote
router would still be able to resolve L3 to L2 mapping dynamically. Whereas frame-relay map ip"
would disable Inverse-ARP for that protocol+DLCI pair.

Can someone please comment ?
Thanks,
Naveen.



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