From: Mike Kraus \(mikraus\) (mikraus@cisco.com)
Date: Thu Jul 05 2007 - 10:54:30 ART
I've done scenarios in conjunction with an IP multicast helper map to
convert a RIPv1 broadcast into a 224.0.0.9 multicast for a remote
segment. The difference is there, on an ip multicast helper you can
remap the ttl value.
As Antonio pointed out, I only needed to configure the ip
forward-protocol on the router that is initiating the forwarding of
broadcasts (R2 from R1 below).
However, in that scenario since I actually sent it over PIM, rather than
a directed broadcast, so I haven't ever labbed up the second part of the
below scenario. But, if you wanted to be crazy, I suppose you could
then convert the multicast (with the remapped ttl value) back into a
broadcast and then try to do it as a directed broadcast. I'm not eager
enough to try to lab this one up though. :)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Antonio Soares
Sent: Thursday, July 05, 2007 7:12 AM
To: 'darth router'; ccielab@groupstudy.com
Subject: RE: ip directed broadcast with ACL
I would configure both:
1)In order be able to forward this traffic
ip forward-protocol udp mobile-ip
2) In order to actually forward the traffic
ip directed-broadcast 101
access-list 101 permit udp any any eq mobile-udp
The question is where should we configure this ?
R1====R2====R3
Imagine R1 as the Broadcast source. So we would need to configure 1) in
R2 and 2) in R2's interface facing R3.
Unfortunately i don't see an easy way to test this. Tried NTP Broadcast
and
RIPv1 but they both have TTL=1.
Wait, maybe IP SLA... I will try it now.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
darth router
Sent: quinta-feira, 5 de Julho de 2007 6:59
To: ccielab@groupstudy.com
Subject: Re: ip directed broadcast with ACL
If I were to forward mobile ip with the ip helper.
I could do both of these correct. This is doing the exact same thing,
right?
ip forward-protocol udp mobile-ip
OR Do:
ip directed broadcast 101
permit udp any any eq mobile-ip
It does not look like using the ACL, and permitting mobile IP only,
disables the forwarding of the ip-helper default protocols. This right?
DR
On 7/5/07, darth router <darklordrouter@gmail.com> wrote:
>
> When you use this command with an ACL, does it disable the default
> forwarded protocols from the ip helper-address? Thanks,
>
> DR
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