3Com SuperStack II 3300 User Manual page 69

Flushing All Learned
Routes
Setting the Default
Route
Removing the Default
Route
2 Enter the destination IP address of the route.
Select subnet mask [255.255.0.0]:
3 Enter the subnet mask of the route. The Layer 3 Module deletes the route
from the routing table immediately.
Flushing deletes all learned routes from the routing table. To flush all
learned routes, enter the following at the top-level menu:
ip route flush
The Layer 3 Module deletes all learned routes from the routing table
immediately.
If you define a default route, the Layer 3 Module uses it to forward
packets that do not match any other routing table entry. The Layer 3
Module can learn a default route using RIP, or you can configure a default
route statically.
If the routing table does not contain a default route, then the Layer 3
Module cannot forward a packet that does not match any other routing
table entry. If this occurs, then the Layer 3 Module drops the packet and
sends an ICMP "destination unreachable" message to the host that sent
the packet.
You cannot configure the default route using the command line
interface; you must use the Web management interface for the Switch.
To set the default route, follow the procedure described in step 3 on
page 31.
To remove a default route from the routing table, follow the procedure
described in step 3 on page 31.
Administering Routes 69