Cabletron Systems 1800 - Manual (Page 231)

Configuring IP Routing 14-15
Some changes to IP Static Routes and IP Interfaces (described earlier)
require an extra step to update the SmartSwitch 1800 software. Changing
certain parameters will generate the message:
Dynamic Routing Parameters
have changed. ............. Do you wish to update them at this time Y/N (N)? This
must be done, but if you are making several changes to IP Interfaces and
Static Routes, you can save time by specifying
N for each change until the
final one. Entering Y after the final change will update all changes made to
both IP Interfaces and Static Routes.
If you forget to specify Y after the last change, you can still update the FRM
via On-line Update Dynamic Routing Parameters , [G] at the
IP/LLC2/BRIDGE/IPX Interfaces Configuration menu (or [A], [A], [E], [G]
from the Main Menu).
IP Routing Parameters
Router
is the IP address of a router that can reach the route destination.
Metric Count
is the number of "hops" (network gateways in the overall path over the internet) from
the 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 Destination
is the IP address of the destination for host routes.
Destination Mask
is the mask used for network routes. It is used only during routing, to identify the
portion of the address associated with the network.
When an IP datagram is received, the software "masks" off this portion of the overall
address and searches for a match to the remaining address in the node's IP routing
table. If there is no match, then the destination mask is checked. If no match is found
here 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 the
source.
Table 14-5 IP Routing Parameters
Parameter Valid Values Default Value
Router valid IP address 255. 255.255. 255
Metri c Count 1–255 1
Route Type Network, Host, Default Network
Route Destination valid IP address or 0 0. 0.0.0
Destination Mask valid IP address 255. 255.255. 255