home router network question : setup correct?
 

So I subscribed to comcast (my cablem modem internet provider) from my home and put a cisco WRV210 in front of the comcast modem. They gave me 1 static ip address which i'm planning to use to access my camera system. I configure the dmz to translate the address to a local one and go straight to the video server. This allows me to access the static ip in the network. This was setup 2 days ago and I've noticed the connection keeps getting slower and slower until the point where I have to reboot the cisco firewall box. upon further investigation, when i plug my laptop into the comcast router, I receive an IP address of 10.1.10.1 which tells me the router also has dhcp enabled.
Is this supposed to enabled? I hope i don't have to return the cisco box and get something else.

thanks in advance

If it's not enabled you have to set static IPs on everything that connects to it. (And sometimes that isn't even an option--I've seen small electronics with Wi-Fi capability but no ability to set an IP.)

If it's getting slower and slower there must be something wrong. In the old days I would suggest something like Wireshark and see if there's junk on the wire but these days packets normally only go where they are supposed to, making it very hard to sniff out problems.

I'd ensure that the Cisco router has up-to-date firmware. If it does, then return it. Personally, I'd go with an Asus RT-N16 running the free and excellent Tomato firmware.