Setting up a secondary IP address range

[Jeremy_Bullock]

We are running out of IP's in our DHCP range and do not have 'room' in our IPv4 to enlarge the current scope. Can you setup a secondary IP range to use DHCP?

Like so:

interface vlan.0.100
ip address 10.10.1.0 255.255.255.0 primary
ip address 10.10.7.0 255.255.255.0 secondary

[André_Herkenrat]

When it stops with the first secondary IP - I agree. But you are opening the door to a bad style of networking (I have customers with 12 secondary IPs in a subnet). Creating a second vlan shouldn't be a problem.

[Daniel_Coughlin]

I am not sure I would use the adjective "nasty". Adding the secondary address with another class c address is not much different than backing off the mask by 1 bit. That said I understand and agree with the sentiment of keeping broadcast domains as small a possible.

[André_Herkenrat]

Both subnets are broadcastdomains - usually broadcastdomains are separated by routers - you plan to connect them with a bridge.

You better create a second vlan with its own IP range and use tagging on the uplinks.

/André

[Jeremy_Bullock]

Why 'nasty'?