Cabletron Systems CSX1000, CSX1200 manual Configuring Static Routes

USER’S GUIDE

When a local host ARPs for a remote host, the CyberSWITCH (with Proxy ARP enabled) determines if it provides the best route to the destination. If it does, it will reply to the ARP request with its own MAC address.

•Suppose Host A wishes to contact Host D. Since Host A thinks every other host is local, it will broadcast an ARP request. The CyberSWITCH, which is on the same physical wire as Host A, will receive the ARP request on one of its LAN network interfaces. The CyberSWITCH makes the determination that it provides the best route to Host D, and generates an ARP response con- taining its own MAC address. Host A then communicates with Host D by sending packets to the CyberSWITCH edge router. The CyberSWITCH forwards packets to the remote destination using standard IP routing.

•Suppose Host B wishes to contact Host C. Host B broadcasts an ARP request. The CyberSWITCH knows that Host C is reachable over a WAN (Direct Host) interface; Host C is considered a log- ical extension of network 1.x.x.x. The CyberSWITCH generates an ARP response, containing its own MAC address. Host B then communicates with Host C by sending packets to the Cyber- SWITCH. The CyberSWITCH forwards the packets over the WAN to Host C.

STATIC ROUTES

CONFIGURING STATIC ROUTES

You only need to configure Static Routing entries if you need to access a WAN network that is not directly connected to the system, or if you need to access a LAN network through a router that does not support IP RIP. Static Routes specify the IP address of the next hop router or gateway that provides access to this network.

USING CFGEDIT

1.Select Static Routes from the IP menu.

2.When asked if this is a default route, answer “N” for no (for a definition of default routes, refer to Configuring Default Routes).

3.Enter the destination address of the designation (sub-) network or host.

4.Enter the subnet mask.

5.Enter the next hop address of the next hop gateway that provides access to the target (sub-) network or host.

6.Enter the metric value (usually the number of routers between the CyberSWITCH and the destination.

7.Enter the IP RIP propagation control (determines how a static route is propagated via IP RIP).

124 CyberSWITCH