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IP address / mask

length

Use these fields to define the type of IP

addresses to which this route applies.

The IP address pattern must be in the dot-

separated IPv4 format, while the mask

length is chosen from a drop-down list

The mask field specifies how many bits of

the address are fixed; unfixed bits must be

set to zero in the address specified.

To route all IP addresses in the range

192.168.4.128 to 192.168.4.255 for

example, specify the IP address as

192.168.4.128 and the mask length as 25,

to indicate that all but the last seven bits

address are fixed.

Route

Use this field to control how packets destined

for addresses matching the specified pattern

are routed. You may select Port A, Port B

or Gateway. If the latter option is selected,

you must specify the IP address of the

gateway you wish packets to be directed to.

Selecting Port A results in matching packets

being routed to Port A's default gateway (see

Configuring Network Settings). Selecting

Port B will cause matching packets to be

routed to Port B's default gateway.

If Ethernet Port B is disabled, the option to

route packets to Port B will be disabled.

Viewing and Deleting Existing IP Routes

Configured routes are listed below the Add IP route controls. For each route, the following details are shown:

● The IP address pattern and mask

● Where matching packets will be routed, with the possibilities being:

❍ Port A - meaning the default gateway configured for Port A

❍ Port B - meaning the default gateway configured for Port B

❍ <IP address> - a specific address has been chosen.

● Whether the route has been configured automatically as a consequence of other settings, or added by the user

as described above.

The default route is configured automatically in correspondence with the default gateway preference field (see

Port

preferences) and cannot be deleted. Any packets not covered by manually configured routes will be routed according to

this route.

Manually configured routes may be deleted by selecting the appropriate checkbox and pressing Delete selected.

Routes Behavior with Disabled Ports

If the default gateway preference is set to Port B (for example) and that port is disabled, the default route will be

updated automatically to route packets not covered by any manually configured route via Port A.

If a manually configured route specifies Port B (for example) and that port is disabled, packets matching that route will

not be automatically be routed via Port A, but discarded. You should take care to avoid this situation.

Current IP status

This table shows the current default gateway and name server(s) for Ethernet Ports A and B. No fields can be changed,

and are provided for reference when configuring the other parameters described in the sections above.