Panasonic FP2 ET-LAN Technical Manual page 61

Routing information setting area 2 (bank 0)
Address Name
Network
230H (subnetwork)
masking (L)
Network
231H (subnetwork)
masking (H)
Default router
232H (Gateway) IP
address (L)
Default router
233H (Gateway) IP
address (H)
Number of
234H registering
router
Default
value
FF000000H to FFFFFFFCH: Field value that determines network
address or subnetwork address.
- The network (subnetwork) mask is value that sets the 32-bit network
address used as the IP address and the bit used for the subnetwork
address to "1".
Example:
FF000000H: For a Class A network
0000H
1111 1111 0000 0000 0000 0000 0000 0000
FFC00000H: When 2 bits are used for a Class A subnetwork
1111 1111 1100 0000 0000 0000 0000 0000
FFFF0000H: For a Class B network
1111 1111 1111 1111 0000 0000 0000 0000
FFFFF000H: When 4 bits are used for a Class B subnetwork
1111 1111 1111 1111 1111 0000 0000 0000
FFFFFF00H: For a Class C network
1111 1111 1111 1111 1111 1111 0000 0000
FFFFFFE0H: When 3 bits are used for a Class C subnetwork
1111 1111 1111 1111 1111 1111 1110 0000
- An error occurs if FFFFFFDH or higher is specified.
- The network (subnetwork) address is the address that results from the
logical AND of the IP address for a source node and the network
0000H
(subnetwork) mask, in the same class and with the same network
address.
Example: If the source node IP address is 59010201H:
- If FF000000H is specified for the network mask, 59000000H will be the
network address (Class A network).
- If FFFF0000H is specified for the subnetwork mask, 59010000H will be
the subnetwork address (Class B network).
[Se values] Default router (gateway) IP address
0000H - This is effective as long as the network (subnetwork) mask field is
anything other than 0.
- If the default router (gateway) IP address has been set, communication
will be carried out through the default router (gateway) without an error
occurring even if the class, network address, or subnetwork address is
different from that of the destination node.
0000H
- The network (subnetwork) address for the default router (gateway) IP
address must be identical to the network (subnetwork) address for the
source node IP address. If they are different, an error will occur.
- 00000000H and FFFFFFFFH will cause errors to occur.
[Set value] 0 to 5
- This specifies the number of routers used on the source network.
- The default router (gateway) is not included in the number of registered
routers.
0000H - This is effective as long as the network (subnetwork) mask field is
anything other than 0.
- Any value higher than 5 will be treated as 5.
- The number of network addresses and router IP addresses registered
should not exceed the number specified here.
Setting value and explanation
5-13