From: brajesh.thakur@wipro.com
Date: Sat Aug 04 2007 - 08:29:13 ART
I believe the last two statements mean same thing, Anyone correct me if
my understanding is wrong.
Warm Regards,
Brajesh Thakur
________________________________
From: Toh Soon, Lim [mailto:tohsoon28@gmail.com]
Sent: Saturday, August 04, 2007 4:30 PM
To: Brajesh Thakur (WI01 - Services)
Cc: ccielab@groupstudy.com
Subject: Re: "frame-relay map broadcast" command for spoke-to-spoke
Hi Brajesh,
I think I got what you mean. The following two configs of R4 should be
functionally equivalent, i.e. to enable broadcast on DLCI 402 without
sending redundant broadcast traffic :
!
int s 0/0
frame-relay map ip 10.10.10.2 402 broadcast
frame-relay map ip 10.10.10.5 402
!
Or
!
int s 0/0
frame-relay map ip 10.10.10.2 402
frame-relay map ip 10.10.10.5 402 broadcast
!
I still need further clarification about your statement "...you are just
sending double broadcast traffic towards hub router". Say R4 has more
than one frame map statements with the "broadcast" keyword and it runs
EIGRP over the FR interface. Is it gonna send two copies of whatever
EIGRP packets (destined to 224.0.0.10) towards R2?
To quote you " In lab they may have mentioned something like "don't
duplicate broadcast traffic when sending data from spoke" ", do the
following two statements mean the same thing?
(1) Do not send any redundant broadcast traffic from the spokes to the
hub.
(2) Ensure that Spoke1 and Spoke2 can ping each other's FR interface,
but this config should be performed such that Hub does not receive
redundant routing updates.
Thank you.
B.Rgds,
Lim TS
On 8/4/07, brajesh.thakur@wipro.com <brajesh.thakur@wipro.com> wrote:
Dear Lim,
If you are using 'broadcast' keyword for both map commands on
spoke
router, you are just sending double broadcast traffic towards
hub router
as broadcast is enabled per dlci basis and not per ip address
basis. In
lab they may have mentioned something like "don't duplicate
broadcast
traffic when sending data from spoke"
Warm Regards,
Brajesh Thakur
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
Behalf Of
Toh Soon, Lim
Sent: Saturday, August 04, 2007 2:34 PM
To: ccielab@groupstudy.com
Subject: "frame-relay map broadcast" command for spoke-to-spoke
Hi All,
I have a hub-and-spoke frame relay network, the DLCIs are as
follows:
R2 (204)------------(402) R4
(205)------------(502) R5
R2 is the hub whereas R4 & R5 are the spokes.
R2 Config
---------
!
int s 0/0
ip add 10.10.10.2 255.255.255.0
encap frame-relay
no frame-relay inverse-arp
frame-relay map ip 10.10.10.4 204 broadcast
frame-relay map ip 10.10.10.5 205 broadcast
!
R4 Config
---------
!
int s 0/0
ip add 10.10.10.4 255.255.255.0
encap frame-relay
no frame-relay inverse-arp
frame-relay map ip 10.10.10.2 402 broadcast
frame-relay map ip 10.10.10.5 402 broadcast
!
R5 Config
---------
!
int s 0/0
ip add 10.10.10.5 255.255.255.0
encap frame-relay
no frame-relay inverse-arp
frame-relay map ip 10.10.10.2 502 broadcast
frame-relay map ip 10.10.10.4 502 broadcast
!
For the spoke routers, what's the difference if the frame map
statement
pointing to each other has the "broadcast" keyword compared to
without
the
"broadcast" keyword? Either way, the spoke routers can ping to
each
other.
I believe it has no bearing on routing protocol neighbor
adjacencies.
Adjacency is only established with the hub router as far as OSPF
and
EIGRP
are concerned.
My understanding is, the frame map statements are not even
required
between
spokes when we run EIGRP or OSPF (p2mp) on the frame relay
network.
Please enlighten me.
Thank you.
B.Rgds,
Lim TS
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