Multi site router config w/only static routes

[pcarter]

I need help creating static routes for a five remote site network. The goal is that a station in each private network needs to be able to talk to each other remote site but most importantly to 8 specific IP's in the central site. The use of this is Polycom videoconferencing codecs "calling" to each station.

Site 1

inside network 192.168.10.x 255.255.255.0

outside interface 66.130.10.1 (for T1 connection to Central Site)

Site 2

inside network 192.168.20.x 255.255.255.0

outside interface 66.130.20.1 (for T1 connection to Central Site)

Site 3

inside network 192.168.30.x 255.255.255.0

outside interface 66.130.30.1 (for T1 connection to Central Site)

Site 4

inside network 192.168.40.x 255.255.255.0

outside interface 66.130.40.1 (for T1 connection to Central Site)

Site 5

inside network 192.168.50.x 255.255.255.0

outside interface 66.130.50.1 (for T1 connection to Central Site)

Central Site

10.20.1.x 255.255.255.0

t1 1/1 (Site 1 T1 interface) 66.130.10.2

t1 1/2 (Site 2 T1 interface) 66.130.20.2

t1 1/3 (Site 3 T1 interface) 66.130.30.2

t1 1/4 (Site 4 T1 interface) 66.130.40.2

t1 1/5 (Site 5 T1 interface) 66.130.50.2

All five remote sites have Cisco 1721 Routers in them connected to T1 lines that all connect to the Central Site

My thinking is that on each site router I want to put in static routes to the central site and to each other remote site. What I want to be sure about is what interface to point the route at. So for example for Site 1, the route config would be:

Hostname Site 1

ip route 192.168.20.0 255.255.255.0 (what interface goes here? 66.130.10.1 or .2?)

ip route 192.168.30.0 255.255.255.0 (what interface goes here? 66.130.10.1 or .2?)

etc...

Hostname Site 2

ip route 192.168.10.0 255.255.255.0 (what interface goes here? 66.130.20.1 or .2?)

ip route 192.168.30.0 255.255.255.0 (what interface goes here? 66.130.20.1 or .2?)

etc...

Thanks much for any help. I very much appreciate advice on how to get this set up. Oh, for political reasons I cannot run any kind of routing protocol like RIPbv2 or OSPF.

PJC

[rsissons]

Static routes alway point to the next hop ip address, so it is the adjacent address on the remote router, ie the .1 address that you willneed to specify here.

[vcjones]

While it can get a bit cumbersome as the network grows larger, you can do just fine with static routes. At each remote site, put a static default route pointing to the IP address of the central end of the T1 to that site. There is no need to define more specific routes at each site as the only way to get to anywhere is via the central site. (Assuming that is true, if the individual sites have Internet connections or other routes available to them, that is a different design).

At the central site, just put in a route for each site LAN pointing to the remote end of the T1 to the site, so at site 1 you would have:

ip route 0.0.0.0 0.0.0.0 66.130.10.2

and at the central site you would have (repeat for each site...)

ip route 192.168.10.0 255.255.255.0 66.130.10.1

Good luck and have fun!

Vincent C Jones

www.networkingunlimited.com