Configuring IP Routing 14-15Some changes to IP Static Routes and IP Interfaces (described earlier)require an extra step to update the SmartSwitch 1800 software. Changingcertain parameters will generate the message: Dynamic Routing Parametershave changed. ............. Do you wish to update them at this time Y/N (N)? Thismust be done, but if you are making several changes to IP Interfaces andStatic Routes, you can save time by specifying N for each change until thefinal one. Entering Y after the final change will update all changes made toboth IP Interfaces and Static Routes.If you forget to specify Y after the last change, you can still update the FRMvia On-line Update Dynamic Routing Parameters, [G] at theIP/LLC2/BRIDGE/IPX Interfaces Configuration menu (or [A], [A], [E], [G]from the Main Menu).IP Routing ParametersRouteris the IP address of a router that can reach the route destination.Metric Countis the number of "hops" (network gateways in the overall path over the internet) fromthe source to the destination.Route Type:Network defines a route for a network.Host defines a route for a specific host.Default defines a route that will be used if no other route is found.Route Destinationis the IP address of the destination for host routes.Destination Maskis the mask used for network routes. It is used only during routing, to identify theportion of the address associated with the network.When an IP datagram is received, the software "masks" off this portion of the overalladdress and searches for a match to the remaining address in the node's IP routingtable. If there is no match, then the destination mask is checked. If no match is foundhere either, the default route (if configured) will be used. If the default route is not con-figured, the datagram will be discarded, and an error message will be sent to thesource.Table 14-5 IP Routing ParametersParameter Valid Values Default ValueRouter valid IP address 255.255.255.255Metric Count 1–255 1Route Type Network, Host, Default NetworkRoute Destination valid IP address or 0 0.0.0.0Destination Mask valid IP address 255.255.255.255
