topic DHCP scope limitations for ASA5505 in Network Security

DHCP scope limitations for ASA5505

millerjt416 — Tue, 12 Mar 2019 01:04:18 GMT

So here is the jist,

I have a ASA5505 that i have running asdm 6.4 on it and have tried setting up some DHCP scopes for the interfaces.

I have the security plus key.

I set up 4 interfaces all with different subnets and all with different DHCP being doled out by the firewall for the timebeing.

Anyway, 3 of the 4 work.

I have tried to change interfaces wondering if there was an issue with that phy device.

I tried enableing the subnet that would not work first and it didnt matter still would not issue dhcp.

the other 3 work fine.

Is there a limitation to the amount of scopes that will issue dhcp for an asa5505 ?

Thanks.

DHCP scope limitations for ASA5505

Jouni Forss — Fri, 22 Feb 2013 19:06:27 GMT

Hi,

You should be able to configure DHCP on every interface of the ASA

Only thing that comes to mind fast regarding the ASA5505 model specifically is that it might have a licensed user limit and therefore might not let you configure large DHCP pools.

Though I think it should warn of this.

Can you share the interface and DHCP configurations?

- Jouni

DHCP scope limitations for ASA5505

millerjt416 — Fri, 22 Feb 2013 19:15:08 GMT

thats the liscensing that i have.

As far as the networks.

lets say they are as follows

10.10.5.0/24-Service net
10.20.5.0/24 - DB net
192.168.5.0/24 - Internal
and the one that doe not work

172.16.5.0/24 Outside

I did not follow the standard on addressing i was just creating some lab envrionments but still didnt htink i would be limited.

DHCP scope limitations for ASA5505

Jouni Forss — Fri, 22 Feb 2013 19:23:05 GMT

Hi,

Could you share the ASA configurations so I can go through them.

- Jouni