Which Gateway to use 1

[vicbear13]

I have a test network set up and am wondering which gateway to use for this set up.

NETWORK A 195.168.1.0
NETWORK B 195.168.2.0
NETWORK C 172.16.0.X (link between Network A & B)

NETWORK / DOMAIN A
DHCP
Servers: 195.168.1.X
Router A E0: 195.168.1.0
Router A E1(link to network A) 172.16.0.1
Server Gateway set: 195.168.1.0
Switch A: Gateway 195.168.1.0

WHICH GATEWAY SHOULD BE ASSIGNED?
Server Gateways ?
Switch Gateway ?

-------------------------------------

NETWORK / DOMAIN B
DHCP
Servers: 195.168.2.X
Router B E0: 195.168.2.0
Router B E1(link to network B) 172.16.0.2
Server Gateway set: 195.168.2.0
Switch A: Gateway 195.168.2.0

WHICH GATEWAY SHOULD BE ASSIGNED?
Server Gateways ?
Switch Gateway ?

Here is the delima....Mail works across domains, ping works, nslookup works within their respective domains. I get a DNS request timeout on nslookup across domains. So, for DNS, networking eq, etc., which gateway should be used? The 172.X.X.X or the 198.X.X.X ? Or should I make the network between each router also the 198.X.X.X network?

 

[bf0x]

A switch does not route so I would not make the switch the gateway. I would go with the first interface you touch from the PC the gateway. From looking at your setup the switch gateway is actually the routers interface. Is this interface the LAN interface? This would be my suggestion to go with the LAN interface on the first router in the respective domain.

Try this and see if it works:
Domain A PC's gateway is 195.168.1.0
Domain B PC's gateway is 195.168.2.0

Make sure in the router there is a route map from domain a to B. I hope this helps.