Re: broadcast question

Thanks Santiago, Marko, all,
The problem is that the vendor doesn't do multicast. They do UDP broadcast
only. and yes, the main objective is to save WAN bandwidth.

Instead of them sending 4 x broadcasts, one per /26 subnet, I want them to
send one broadcast for the /24, then have the router forward it to each of
the /26s. Just wondering if there's some way of configuring this on the
router..?

On Tue, Mar 2, 2010 at 1:06 PM, Santiago Enciso
<santiago.enciso_at_gmail.com>wrote:

> JG, if you want to save bandwidth use multicast to transport the broadcast
> traffic until you reach the last hop router. You can achieve this
> implementing:
>
>
> http://www.cisco.com/en/US/docs/ios/ipmulti/configuration/guide/imc_inter_mc_helper_ps6441_TSD_Products_Configuration_Guide_Chapter.html
>
> If the last hop router ends all the /26 networks in the same interfaces
> that goes to the same switch you can share the same multicast stream between
> diferent vlans of the same switch with MRV.
>
> Hope this clarifies.
>
>
> Santiago E
>
>
>
>
> On Tue, Mar 2, 2010 at 2:35 PM, Jersey Guy <guy.jersey_at_gmail.com> wrote:
>
>> Sorry, let me clarify.
>>
>> In some situations (small offices), we'll have one /26 on say Eth0 of the
>> router and one /26 on Eth1 of the same router. In bigger offices, we'll have
>> one /26 hanging off a switch on one floor, another /26 on another vlan in a
>> different floor & switch and so on...
>>
>> thanks, JG
>>
>>
>> On Tue, Mar 2, 2010 at 12:30 PM, Santiago Enciso <
>> santiago.enciso_at_gmail.com> wrote:
>>
>>> > sitting on the same router's LAN interfaces
>>>
>>> The requirement says on the same lan interfaces wich should be an 802.1q
>>> or ISL trunk connected to a switch.
>>>
>>>
>>>
>>>
>>> On Tue, Mar 2, 2010 at 2:25 PM, Marko Milivojevic <markom_at_ipexpert.com>wrote:
>>>
>>>> On Tue, Mar 2, 2010 at 17:04, Santiago Enciso <
>>>> santiago.enciso_at_gmail.com> wrote:
>>>> > You can try with MRV (multicast vlan registration)
>>>>
>>>> Good point, however he explicitly talked about router, not a switch. I
>>>> doubt this feature is available on routers ;-)
>>>>
>>>> --
>>>> Marko Milivojevic - CCIE #18427
>>>> Senior Technical Instructor - IPexpert
>>>>
>>>> Mailto: markom_at_ipexpert.com
>>>> Telephone: +1.810.326.1444
>>>> Fax: +1.810.454.0130
>>>> R&S Video on Demand Demo: http://bit.ly/aFyrU4
>>>>
>>>
>>>
>>>
>>> --
>>> -----------------------------
>>> Santiago Enciso
>>>
>>>
>>
>
>
> --
> -----------------------------
> Santiago Enciso

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Received on Tue Mar 02 2010 - 13:44:13 ART