UDP Broadcast forwarding, Nexus

[erick.whiteford]

Customer is using Exterity product to stream TV to receivers placed around the LAN. Management of the receivers is done with a package which receives SNMP traps from the receivers before adding the receiver to the management database.

If the receiver is in a different VLAN from the management device the traps need to be forwarded to the “management” VLAN using an “ip helper-address”.

This is where I run into a problem as the Layer 3 is on a Nexus 7000 series running NX-OS (v5.1(1)) and it doesn’t appear to support the ip helper-address command, instead it uses the “ip dhcp relay address”.

Am I missing something or is there a way of forwarding UDP port 162 to a different VLAN on the Nexus?

[Chad Peterson · Accepted solution]

Hi Erick,

The Nexus 7000 doesn't have support for routing broadcasts from one vlan to another.  Only time we do this is DHCP Relay (which translates broadcast to unicast).

Chad

[erick.whiteford]

Thanks Chad. That was the conclusion I had already come to, however, I wanted to run it past someone in the know in case I had missed something.

[brianokelly]

Hi Chad, do you know if it is planned to provide this functionality in the Nexus in future releases?

[Sung Min Cho]

Chad,

We need the routing broadcasts from one vlan to another for netbios protocol.

Any idea for dolving the this problem ?

Thank,

Sungmin