From: Godswill Oletu (godswill@inbox.lv)
Date: Sat Apr 29 2006 - 18:17:58 GMT-3
Chris,
The "Cloud" or better still, the Frame Relay Switch does not learn DLCIs
from the Router (host side). The "Cloud" is in control and it dictates what
DLCI get advertised out via LMI. If a DLCI not known by the "Cloud" is
configured on the DTE Router (host side), the "Cloud" will reject it and
send a status "Deleted" to the host side and your frame relay network will
not work.
On the flip side, the DTE Router (host side) can choose and pick which
DLCIs, it want to use and that is where the various variates of the 'no
frame-relay inverse-ARP..."
The current Frame relay implementation does not use ARP, hence the 'no ARP
Frame-relay..." will be of no use to either the DCE or DTE side.
Inverse-ARP in Frame relay, means I have an IP address (Layer 3 Address) and
I want to resolve it to a DLCI (Layer 2 Address). If not disabled or
restricted, the router will send Inverse-ARP on all the DLCIs advertised to
it via LMI from the "Cloud" or Frame relay switch.
If ARP were to be use in Frame relay, you will be able to configured a DLCI
(layer 2 address) on the DTE router, and it will send an ARP request out and
expect the "Cloud" or Frame relay switch to figure out what its IP address
(layer 3 address) is, and send that information back to it. Just the same
way, your IP less PC boots up, sends an ARP request out and the DHCP server,
configured with mac address-to-ip-addresses mappings, will interprete that
request, and bassed on the mac address (layer 2 address) of the PC, it will
be able to assign the appropriate ip address (layer 3) to the PC.
But, for now only Inverse-ARP is being implemented on Frame-relay.
HTH
Godswill Oletu
----- Original Message -----
From: "Chris Broadway" <midatlanticnet@gmail.com>
To: "Godswill Oletu" <godswill@inbox.lv>
Cc: "Elliott Reyes" <elliottreyes@adelphia.net>; <ccielab@groupstudy.com>
Sent: Saturday, April 29, 2006 3:51 PM
Subject: Re: Frame-Relay Question
> I was under the impression that disabling inverse ARP stopped the host
side
> of the frame connection to not learn DLCI's from the cloud and the no arp
> frame-relay command stopped the cloud from learning from the host side.
>
> -Chris
>
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