Allied Telesis AT-S63 - Manual (Page 553)

AT-S63 Management Software Command Line Interface User’s Guide
Section VII: Internet Protocol Routing 553
For example, assume a switch supported four subnets with four interfaces
named VLAN4-0, VLAN11-0, VLAN12-0, and VLAN12-1. If you created a
static route to a remote destination that had as its next hop an IP address
in the subnet of the VLAN4-0 interface, the switch would automatically add
the route to the VLAN4-0 interface.
A new static route immediately becomes available for all of the interfaces
on a switch to use for routing packets to the remote subnet. For example,
referring to the previous example, a static route added to the VLAN4-0
interface would be available to all the other interfaces on the same switch.
The switch can store up to 1024 static routes.
A static route is functional as soon as it is added to an interface and cannot
be disabled. You must delete a route from the table to stop a switch from
routing packets with the route.
Static routes have a parameter called the metric that is a measurement of
the cost of the switch when it forwards packets to the remote destination
specified in the static route. The metric or cost is simply the hop count. The
default setting for a static route is one hop. The value can be set higher to
make a static route more costly. Networks, subnets, and nodes directly
connected to a router have a hop count of 0.
When the switch receives a packet from a remote subnet, it increases the
metric or cost of the packet before forwarding it on to the next hop. A
remote destination with a hop count of 16 is considered unreachable.
Static routes also have a parameter for assigning a preference value. The
switch uses this value to select the active routes when there are multiple
static or dynamic routes in the routing table to the same remote
destination. The range for the preference parameter is 0 to 65535. The
lower the value, the higher the preference. The default value for a static
route is 60.
The commands for managing static routes are “ADD IP ROUTE” on
page 577, “DELETE IP ROUTE” on page 584, and “SET IP ROUTE” on
page 595.
Note
The command line interface is the only management interface in the
AT-S63 software that supports static routes. Static routes are not
supported from the menus and web browser interfaces.