I'm really not sure if anyone would have even attempted such scenario !!!! DHCP requests are basically broadcasts which work well on a single subnet.. if you have multiple subnets on the LAN, you can obviously use the "helper addresss" to transport it to the other subnets.. But with your case, there is a PIX, WAN etc which will not transport this broadcast !!!
Have a local DHCP server.. you also have a lot of switch/router which supports DHCP.. you can configure any local switch or router as a DHCP server and finish it off !!!
My plan was to use ip-helper on all client interfaces, But ...
So the real question is, has anyone tryed the senario, when Client networks are placed on on side of a PIX Firewall, and servers are placed on anoter side,
There is no servers/clients connected directly on the same subnet as the pix, there for ip-helper would be used on client interfaces, ip-helper will point to the central DHCP Server, only issue ? there is a PIX ind the middel ?
I know is?t posible to use the local DHCP server, om Switchs/Routers, but for this task i need it to be the central DHCP server ..
I am also trying to pass DHCP packets across a PIX, I configured DHCP relay and clients directly connected to the PIX received DHCP addresses but clients the other side of a router are not getting addresses I have allowed 67,68 through the PIX but not 547/546 we are using IP v4. Using Debug on the Router I can see encapuslation errors the client interface has encapsulation 802.1Q with Sub interfaces and a ip helper address but the other interface connected to the PIX does not have 802.1Q encapsulation.
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