HP proCurve User Manual page 226

Appendix A
Configuring IP Parameters
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Make sure that every device has a unique IP address. Make sure that all devices
on a given IP network number have the same subnet mask.
The IP configuration parameters are described below.
IP Address . The IP address of the hub, bridge, or switch is written in the
format X.X.X.X, where each X is a decimal number between 1 and 254. Every
IP address on a network must be unique.
The default value, 0.0.0.0, disables IP communications. Use the default value
only if you are not going to manage the device with HP TopTools for Hubs &
Switches and you want to disable IP communications for that device.
Subnet Mask. The bit mask defines which portion of the IP address is the
subnet address and is written in the format X.X.X.X. The default value is
automatically generated and depends on the class of IP address that you
entered. See your network administrator for the subnet mask address. All
devices on a given IP network number must use the same subnet mask
address.
Primary Default Router. The routing IP address of the nearest router in
your network. The default is 0.0.0.0.
Backup Default Router. The IP address of the router to use when the
primary default router is inaccessible. The default value is 0.0.0.0. If there is
no backup router and no primary default router, use the default.
Time To Live . The number of IP routers a packet is allowed to cross before
the packet is discarded. The default value is 32. Increase this value if the hub,
bridge, or switch is managed from a network management station that is more
than 32 routers away. The maximum allowable value is 255.
For selected devices, such as the HP J2980A AdvanceStack 10/100 LAN
Switch-16, you must preconfigure the SNMP community name "public" on the
device to allow the device to be discovered and managed by HP TopTools for
Hubs & Switches. Typically, the community name on HP hubs and bridges will
automatically default to "public".
To configure a device for IP networks, use the device's console port interface.
Refer to the device's Installation and Reference Guide for use of the device's
RS-232 console port.
For HP hubs, HP TopTools for Hubs & Switches can be used to change IP
addresses after they have been initially assigned during installation.