A 100Mb, full-duplex network that isn't operating in the Black Hole of Calcutta should have sub 1ms ping times, yes. The slowest modern pings should be coming from 11Mb .11b LANs, and they are right around 2ms.
Your suggestion is called a 'back channel', and it could work just fine. You will probably find, though, that you are working with the routing tables on the individual workstations more than the routers, with this type of configuration. Whether that is ok with you or not... that's your call. It...
Ok, I see a couple of problems.
1) Your brother's router is NATing, instead of purely bridging the two subnets.
2) Your router is not bridging the two subnets at all, but at least you can ping the LAN side through your bro's router.
These will need to be solved in this order. After your...
Try pinging these:
Speedy -> 192.168.0.1
Texas -> 192.168.0.99
Washington -> 192.168.0.99
Speedy -> 192.168.0.2
Speedy -> 192.168.0.3
Texas -> 192.168.1.201
If you can't hit any one of these, try pinging the broadcast addressess for each subnet from Texas and Speedy:
Speedy ->...
Ok, I see how this is working... His router should be connected (via the WAN port) to your router (via a LAN port). Then set the gateway on your router's static route to his WAN IP and the gateway on his router's static route to your LAN IP.
The gateway entry should be the next hop interface toward the destination... e.g.:
ROUTER(EXT. IP) -> Internet
ROUTER (192.168.0.1/24) -> PC1 (192.168.0.100/24) = First subnet
ROUTER(192.168.1.1/24) -> PC2 (192.168.1.100/24) = Second subnet
Now, ROUTER would be dual-homed in both the...
With regard to all the ringing "Why?"s, it is entirely reasonable for his brother to want his own network. It is especially so, being that he already _has_ the hardware. This is just Intro to ISP 101.
The previous poster could be entirely correct in asserting that it could be done with...
You would need to edit the routing tables for each router, adding a route from one subnet to the other (through the proper router) to each router. This generally is not possible with SOHO routers...