Different subnets on the same switch

Basher

Basher

Basher

Soldato
Joined
18 Oct 2002
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9,158
Hi guys, I have a quick question about the above. Say, for example, I have a simple wetup whereby I have a switch connected to a router. Would it be possible for the devices on my switch to be in different subnets, or would I need a seperate switch for each subnet?

Kind Regards,

James
 
In that case, what are the advantages of using a management VLAN on devices rather than a management subnet?

Cheers,

James
 
Yeah i realise that, but say you have a network in a data center and you want the traffic for production systems and traffic for network management, so, SNMP, KVMoIP, iLO, that sort of stuff seperate. I can see two options here, two vlans on a switch, one for production, one for management, or two subnets for the same purpose. What would one offer over the other? Do they not both reduce the broadcast domain or does one offer more/less than the other?

Regards,

James
 
Hi, yeah I realise the importance of management VLANs got lots of info on this :)

As for routing between subnets and VLANs this is not required at this switch level as there's a router above to do that.

I'm thinking, like you said the main reason to choose VLAN is that cisco devices listen on the management vlan which is, by default 1. If production traffic is not vlan'd it will also be using vlan 1 so the switch will have to process all of that unneccessery traffic. Soooo either production or management will have to have a seperate VLAN to avoid this, and obviously doing it to management will be much more straight forward.

Does this make sense!?

Cheers,

James
 
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