Hi there, Have a look into "UDP broadcast flooding" http://www.cisco.com/en/US/tech/tk1330/technologies_case_study_chapter09186a0080759920.html#wp3321 and "bridging between 802.1Q VLANs" http://www.cisco.com/en/US/docs/ios/12_1t/12_1t3/feature/guide/dtbridge.html The second is required if you wish to flood UDP broadcasts between subinterfaces. I did a setup like this 5 years ago on a 7206 and it worked like a charm. Rgds Alex
----- Original Message ----- From: "Arne Larsen / Region Nordjylland" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, March 10, 2008 3:47 PM Subject: [c-nsp] VS broadcast address relaying from Vlan to Vlan > Hi Folks. > > I hope someone can help me out here. I have a problem with devices from a > supplier to our ventilation system. > There units are IP based, but they aren't very clever units. When the > temperature is being propagated to all units the sending device sends it > to the broadcast address on its own LAN. > Furthermore the devices are sending information to each other the same > way, by sending to the broadcast address. > So as long all devices is on the same broadcast domain everything works > fine. The units sends to port 49152 udp on the broadcast address. > But, there can only be 32 units on each broadcast domain for some reason > that I'm not aware off. > So I have to segment it into more VLan on our core switch (its 6500). > Now, how do I propagate the packets that are sent to a broadcast address > on one VLan to all others VLan. > I've setup helper-addresses for relaying the broadcast traffic to the > broadcast address on all others VLan and I've appended port 49152 udp in > the forward-protocol. > > Here is the what I've tried to get working, but it's not. > > > interface Vlan400 > ip address 10.8.40.1 255.255.255.192 > ip broadcast-address 10.8.40.63 > ip helper-address 10.2.40.127 > ip helper-address 10.2.40.191 > ip directed-broadcast > > interface Vlan401 > ip address 10.8.40.65 255.255.255.192 > ip broadcast-address 10.8.40.127 > ip helper-address 10.2.40.191 > ip helper-address 10.2.40.63 > ip directed-broadcast > ! > interface Vlan402 > ip address 10.8.40.129 255.255.255.192 > ip broadcast-address 10.8.40.191 > ip helper-address 10.2.40.63 > ip helper-address 10.2.40.127 > ip directed-broadcast > > > > > /Arne > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
