From: CCIE 4 Me (ccie4me@inbox.lv)
Date: Sun Apr 30 2006 - 19:23:34 GMT-3
Luis,
I am trying hard to understand what you are looking to achieve here.
A Cisco Router will understand both IETF and Cisco encapsulation, it will
not make any different what encapsulation, you are using to send the frame
packets to it.
However, if the other end is non-Cisco, then you have to use IETF for it to
understand what your Cisco Router is sending, on the flip side, your Cisco
router will understand what the non-cisco router is sending to it, because
it can de-encapsulate IETF packets, but the frame relay link will not come
up, because a complete bidirectional handshake have not be taken place.
In these days of autosensing, if there is no restriction or requirement
indicating otherwise, 'encapsulation frame-relay' is enough and if you are
required to do manual mapping or exclude 'Inverse-ARP, 'frame relay map ip
n.n.n.n <dlci> broadcast' will be good enough.
Both options you stated below should work fine on a Cisco plateform.
HTH
Godswill Oletu
----- Original Message -----
From: "Luis Rueda" <luis.rueda@comsat.com.co>
To: <ccielab@groupstudy.com>
Sent: Sunday, April 30, 2006 2:24 PM
Subject: FRAME-RELAY ENCAPSULATION QUESTION
> Hi all,
>
> I have a question for the following scenario, let's say we have 3
> routers, R1, R2, R3.
>
> The following topology is used (Hub-Spoke) R1 is the hub, and R2 and R3
> area spokes. If R3 is set with the following config:
>
> Interface serial0/0
> encapsulation frame-relay ietf
>
> How should I configure R2 and R1 with frame-relay map statements in
> order to match the correct encapsulation for R3 ?
>
> Should I set the following config:
>
> R1 (HUB)
> Interface serial0/0
> encapsulation frame-relay
> ip address 200.200.200.1 255.255.255.0
> frame-relay map ip 200.200.200.3 103 broadcast ietf
> frame-relay map ip 200.200.200.2 102 broadcast
>
> R2 (SPOKE -CISCO ENCAPSULATION-)
> Interface serial0/0
> encapsulation frame-relay
> ip address 200.200.200.2 255.255.255.0
> frame-relay map ip 200.200.200.1 201 broadcast
> frame-relay map ip 200.200.200.3 201 broadcast
>
> R3 (SPOKE -IETF ENCAPSULATION-)
> Interface serial0/0
> encapsulation frame-relay IETF
> ip address 200.200.200.3 255.255.255.0
> frame-relay map ip 200.200.200.1 301 broadcast
> frame-relay map ip 200.200.200.2 301 broadcast
>
> Or should I set it up this way:
>
> R1 (HUB)
> Interface serial0/0
> encapsulation frame-relay
> ip address 200.200.200.1 255.255.255.0
> frame-relay map ip 200.200.200.3 103 broadcast ietf
> frame-relay map ip 200.200.200.2 102 broadcast
>
> R2 (SPOKE -CISCO ENCAPSULATION-)
> Interface serial0/0
> encapsulation frame-relay
> ip address 200.200.200.2 255.255.255.0
> frame-relay map ip 200.200.200.1 201 broadcast
> frame-relay map ip 200.200.200.3 201 broadcast ietf
>
> R3 (SPOKE -IETF ENCAPSULATION-)
> Interface serial0/0
> encapsulation frame-relay IETF
> ip address 200.200.200.3 255.255.255.0
> frame-relay map ip 200.200.200.1 301 broadcast
> frame-relay map ip 200.200.200.2 301 broadcast
>
> Regards,
>
> Luis
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Mon May 01 2006 - 11:41:59 GMT-3