multicast or broadcast a unicast packets over network

forbiddenforest2k10 · ‎12-03-2011

hi all

I have one application running on windows XP computer that send UPD packet to ip address 10.10.10.2 . actually what i have to do is that i want to send/forward that packet distine for 10.10.10.2 to my other computers that are on other network following is scenario of my network

PC1 sends UDP packet to 10.10.10.2 on Router1 port

PC1 ------------------------------------------------------------->[Router1]-------------------------------------------[Router2]--------------------[switch]--------------------(3xPCs connected)

E0/0 E0/1 E0/0 E0/1

following is configuration of my Routers

PC1 connected to Router1 has ip address 10.10.10.1

Router1>E/0/0 Ip address 10.10.10.2 subnetmask 255.255.255.0

Router1>E/0/1 Ip address 10.20.20.1 subnetmask 255.255.255.0

Router2>E/0/0 Ip address 10.20.20.2 subnetmask 255.255.255.0

Router2>E/0/1 Ip address 192.168.1.1 subnetmask 255.255.255.0

PCs connected to switch have following ip address

PC1 ip address 192.168.1.2 subnet mask 255.255.255.0 defaultgatway 192.168.1.1

PC1 ip address 192.168.1.3subnet mask 255.255.255.0 defaultgatway 192.168.1.1

PC1 ip address 192.168.1.4subnet mask 255.255.255.0 defaultgatway 192.168.1.1

my question is that

is it possible to send/forward unicast packet that is distine for 10.10.10.2 across other networks

is it possible to multicast/broadcast that unicast packet and send it across network

I m new i network field

kindly help me how can i multicast the unicast packet send me configuration accoding to my above topology

Regards

forbs

Marwan ALshawi · ‎12-04-2011

If you can send from pc1 to broadcast address 10.10.10.255

Enable multicasting on both routers

Covert broadcast to multicast on R1 and convert multicast to broadcast on R2 with LAN broadcast ip 192.168.1.255

See the below discussion that discuss simlar concept

https://supportforums.cisco.com/message/622198#622198

Hope this help

If helpful rate

forbiddenforest2k10 · ‎12-04-2011

if i send data on 10.10.10.255 (which is network broadcast address of 10.10.10.0) will it be possible that i can receive it on 192.168.1.0 network on other side of my network.?

Richard Burts · ‎12-04-2011

fober

If you send the traffic to 10.10.10.255 then you should be able to configure ip helper-address and have it forward the traffic to the 192.168.1.0 network.

HTH

Rick

HTH

Rick

Marwan ALshawi · ‎12-04-2011

By converting the broadcast to multicast in router 1 and from multicast to broadcast in router 2 toward the LAN you can do it

Using the helper-map as diss used. In the link provided above. And the below article too

https://supportforums.cisco.com/message/622198#622198

HTH

if helpful rate

Marwan ALshawi · ‎12-04-2011

http://blog.ine.com/2008/05/06/understanding-the-ip-multicast-helper-map-command/