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

[Erik_Auerswald]

Hi Jeremy,

you can add a secondary IP address to a VLAN:
configure vlan <NAME> add secondary-ipaddress <ADDRESS> You can configure the BOOTP Relay service to include the secondary address(es):
configure bootprelay ipv4 include-secondary Br,
Erik

[André_Herkenrat]

Hi Jeremy,
working with secondary IP addresses on a router interface is possible but alway a nasty workaround.

Regards
André

[Curtis_Parish1]

Your DHCP server will need to be configured to show the different subnets are actually a part of the same network. Our BlueCat DHCP servers are able to do that.

[Ronald_Dvorak]

Another thing is the DHCP request - I assume DHCP relay will be used,
In that case the router will send out 2 requests for the different scopes and the first reply will decide which IP (subnet) is used by the client.

In my opinion it's better to configure a new VLAN instead of using a secondary IP.