From: Mitchell, TJ (tmitchell@allianttech.com)
Date: Mon Nov 14 2005 - 12:00:39 GMT-3
Chris -
That configuration goes on the spoke routers.
R3 -
Inter ser0/0
IP Add 192.168.1.3 255.255.255.0
Encapsulation Frame-relay
No frame-relay inverse-arp
Frame-relay map ip 192.168.1.4 304 broadcast
Frame-relay map ip 192.168.1.5 305 broadcast
R4 -
int s0/0
encap frame-relay
no frame-relay inverse-arp
ip address 192.168.1.4 255.255.255.252
frame-relay interface-dlci 403
R5 -
int s0/0
encap frame-relay
no frame-relay inverse-arp
ip address 192.168.1.5 255.255.255.252
frame-relay interface-dlci 503
Thanks
T.J. Mitchell
________________________________
From: Chris Lewis [mailto:chrlewiscsco@yahoo.com]
Sent: Monday, November 14, 2005 9:45 AM
To: Mitchell, TJ; Skinner, Stephen; Arun Arumuganainar;
ccielab@groupstudy.com
Subject: RE: IE Lab Exercise
I'm sorry TJ, I'm not sure I follow:
The config supplied (it did not say for which router) was as follows:
int s0/0
encap frame-relay
no frame-relay inverse-arp
ip address 1.1.1.X 255.255.255.252
frame-relay interface-dlci 40X
What I was trying to point out was the following:
1. All DLCIs are by default assigned to the physical interface, so the
last command here adds nothing over and above what teh router would do
if it were not there.
2. with no fram-relay inverse-arp and no manual map statements, there
are no L3 to L2 mappings, so no packets will be sent out that interface.
You seem to be thinking that turning off inverse-arp will not allow the
router to assign a DLCI to an interface. This is incorrect. inverse-arp
is about mapping a layer 3 destination to a local layer 2 address.
"Mitchell, TJ" <tmitchell@allianttech.com> wrote:
Chris --
R3 is going to use the Frame-relay map command under the
physical
interface.
Next the configuration that was provided for the spokes (by
Stephen)
will work fine, since you disabled inverse arp on the spokes the
DLCI's
need to be specified.
Using that configuration doesn't configure L3 - L2 mapping on
the
physical interface for the spokes.
Thanks
T.J. Mitchell
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
Behalf Of
Chris Lewis
Sent: Monday, November 14, 2005 9:10 AM
To: Skinner, Stephen; 'Arun Arumuganainar';
ccielab@groupstudy.com
Subject: RE: IE Lab Exercise
Stephen,
I don't see how this would help. All DLCI's are assigned to the
physical
interface by default, so assigning the DLCI with that command
here does
nothing. Also this is a multipoint interface, so without some
layer 3 to
layer 2 mapping, no packets are going anywhere.
Arun, I believe the IE lab solution guide gives a working
config, can't
you look at that? From memory I think the OSPF section gives a
clue as
to how spoke to spoke connectivity is achieved. On the hub you
can still
use map statements.
Chris
"Skinner, Stephen" wrote:
int s0/0
encap frame-relay
no frame-relay inverse-arp
ip address 1.1.1.X 255.255.255.252
frame-relay interface-dlci 40X
HTH
Stephen Skinner
> -----Original Message-----
> From: nobody@groupstudy.com [SMTP:nobody@groupstudy.com]
> Sent: 14 November 2005 11:17
> To: ccielab@groupstudy.com
> Subject: IE Lab Exercise
>
> *** WARNING : This message originates from the Internet ***
>
> Here are conditions .
>
> 1) Topology HUB and SPOKE . R3=> Hub R4 and R5 => Spoke .
> 2) Use only Physical interfaces on all the 3 routers
> 3) Do not use Dynamic mapping ( No Inverse ARP )
> 4) Do not configure static Layer 3 to Layer 2 Mapping on
spokes
>
> Just wondering How to configure this ?. Any body can throw
some light
on
> it .
> It would be great !!!
>
> Thanks and Regards
> Arun
>
>
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