Procurve 2524 vlans broadcast

[as1981]

All,

Apologies for what is probably a silly question. We have switches set up with two vlans. Is it possible for broadcast data to be sent between the two v-lans?

The purpose of the vlans is data priority (voice before data) rather than to separate traffic for general speed reasons so if there is another way around this then I'd welcome and suggestions.

Thanks

Andrew

 

[LawnBoy]

Broadcast traffic won't cross VLANs, not even ARP. There are ways to multicast between VLANs, but I don't think the 2524 supports it.

What exactly are you trying to fix? There are probably other ways around the issue...

"We must fall back upon the old axiom that when all other contingencies fail, whatever remains, however improbable, must be the truth." - Sherlock Holmes

 

[as1981]

Many thanks for your response. The problem is as follows:

We have two switches with two vlans setup, one for data and one for voice. This is purely done so that we can prioritise the voice data to avoid pauses in calls. The phone system, on the voice vlan, sends out status updates by broadcase which need to be received by PC's on the data vlan. The phone system is clever enough in that if it's sees PC software on the data vlan wanting it's data then it will use multicast but only up to 10 connections which is less than we need.

Unfortunately creating two connections between the switches is not an option.

I hope this explains the situation and apologies for the long post.

Thanks again

Andrew

 

[LawnBoy]

Does every PC on the data VLAN need to hear these broadcasts on the voice VLAN?

One way around is to have the PCs be members of both VLANs. If the NICs are 802.1Q compliant, you can place both VLANs on the single NIC. If they're not 802.1Q, you can put in another NIC which is on the other VLAN.


"We must fall back upon the old axiom that when all other contingencies fail, whatever remains, however improbable, must be the truth." - Sherlock Holmes

 

[as1981]

Many thanks for your help. It isn't every PC. I'll check the logistics of spare ports, cards e.t.c. when I get back into the office on Monday.

Thanks

Andrew

 

[LawnBoy]

You don't need any more ports on the 2524. By default, it can run up to 8 VLANs (max of 30) on any physical port. The 2524 is fully 802.1Q compliant.


"We must fall back upon the old axiom that when all other contingencies fail, whatever remains, however improbable, must be the truth." - Sherlock Holmes

 

[LawnBoy]

Oh, the 2524 does support multicasting, as you have already discovered.

"We must fall back upon the old axiom that when all other contingencies fail, whatever remains, however improbable, must be the truth." - Sherlock Holmes

 

[Bas1234]

You could try to do a route add on the PC or server

Start > Run > CMD > typ;

Route ADD xxx.xxx.xxx.0 MASK 255.255.xxx.xxx xxx.xxx.xxx.xxx (IP of Switch) and a /P to save it always if there is no /P then after a reboot it will be gone.


greetzzz...Bas

___________________________________________
It works! Now if only I could remember what I did...
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[as1981]

Bas,

Unfortunately we have a phone system connection on one vlan and that will only broadcast to 10 items on the other v-lan and ignore the rest.

Thanks for the suggestion.

Andrew

 

[Bas1234]

i know the HP 2626 supports routing, and it works when you put a route on the server with a second scope special for the Voice VLAN. I'm not sure if the 2524 supports routing

try in the CLI > show IP route


greetzzz...Bas

___________________________________________
It works! Now if only I could remember what I did...
___________________________________________

 

[kenny5445]

Hi, not sure if this will fit your enviroment but here goes...

Do your handsets/switch automatically tag the packets as they are produced?

If so could you not have one VLAN with no override set, then the phones data will still take prioriy but be on the same vlan as the data?