Heritage Series ADSL Bridge/ Router | 97 |
Command Sets for Command Line Interface |
31. subnet
Syntax:
subnet
subnet add <name> <i/f> <IP address> <mask> subnet delete <name>
subnet flush
Description:
Lists defined subnets; defines a subnet; deletes a subnet definition; or deletes all subnet definitions.
“<name>” is a label, that can be specified by “subnet add” and later used by “subnet delete” to delete the subnet.
“<i/f>” is not used, but is present for historical reasons and must be specified as either “.” or a valid interface name.
“<IP address>” is the IP address of the subnet being defined (only those bits of “<dest>” corresponding to bits set in “<mask>” are relevant).
“<mask>” is the subnet mask of the subnet being defined, specified as four hexadecimal numbers separated by colons.
A subnet is defined automatically for each interface, with a name formed by appending “.home” to the device name. The only significant use for the “subnet” command is to change the masks for these automatic subnets, if the default masks (see “device” command) are not correct. (Subnet definitions for other subnets can also be useful in conjunction with RIP version 1, which does not communicate subnet masks, but this is not very common.) Configuration saving saves this information.
Example:
DSL> ip device
# type dev file IP address
device ether ether //nice mtu 1500 192.168.2.1 device vlane ether //lane mtu 1500 192.168.55.1 DSL> ip subnet
subnet vlane.home . 192.168.55.0 ff:ff:ff:00 vlane subnet ether.home . 192.168.2.0 ff:ff:ff:00 ether DSL> ip subnet add vlane.home . 192.168.55.1 ff:ff:fc:0
DSL> ip subnet
subnet vlane.home . 192.168.52.0 ff:ff:fc:00 vlane subnet ether.home . 192.168.2.0 ff:ff:ff:00 ether
