Alcatel Unleashed

Hello,

does anyone know how is ip helper working on vlan which have more ip interfaces ? I did few tests and it seems that dhcp request is forwarded only for one subnet. Once it's full and dhcp server is not responding because no free lease in pool - switch is not trying to ask for IP from another subnet.
ip helper is asking for ip from subnet 192.168.1.0/24. It's working ok until the pool is full. Then clients simply stop receiving IPs because switch is not trying to ask for IP from subnet 192.168.2.0/24. I'd like to find something in documentation where is this behavior described.

Must say i never used different subnets on same vlan (you can have more vlans, you know ).

So open a SR, but i guess this is not the commonly used scenario..

Hi,
I think the same like devnull. Better it to change the design at the customer with one subnet per vlan.
Maybe vendorspecific attributs at the dhcp-server itself is helpfull for your (depends from the reason of your wish).
regards
Silvio

Your Configuration is Secondary interface. Ip helper is use for primary address only.

Example

ip interface test1 address 192.168.1.1/24 vlan 1 [ It is primary address because is first interface ]
ip interface test2 address 192.168.2.1/24 vlan 1

ip helper address 10.10.10.10 vlan 1


-> show ip interface vlan 1
Total 2 interfaces
Name IP Address Subnet Mask Status Forward Device
--------------------+---------------+---------------+------+-------+----------------------------------------------------
test1 192.168.1.1 255.255.255.0 UP YES vlan 1
test2 192.168.2.1 255.255.255.0 UP YES vlan 1
test1 is currently primary.