Novell NETWARE 6-DOCUMENTATION Manual page 1813

HR Time To Live specifies the time-to-live interval, in minutes, that the
IPXODI module attempts to use with the Home Router. It defines how
long the Home Router serves the mobile client before the router requires
an update from the mobile client. If this is not defined, IPXODI uses a
default value of 30 minutes.
NOTE:
HR Time To Live can be overridden by the Home Router's Time To Live
Override parameter.
If the client does not update the Home Router after the HR Time To Live
value runs out, the Home Router stops serving the mobile client. Note that
only NCP watchdog packets, not Sequenced Packet Exchange (SPX
TM TM
) watchdog packets, are handled by the Home Router. If the mobile client
roams out of range and comes back within the amount of time set by HR
Time To Live , the timer is reset automatically; otherwise, if the client is
not back within range when the timer runs out, the mobile client is
dropped.
It is especially important to set HR Time To Live to a large value if the
mobile client is out of network range for a long time. While the time-to-
live value is still active in the Home Router, the router responds to server
NCP watchdogs on behalf of the client so that client sessions do not time
out while network connectivity is lost. If this value is too small, the Home
Router stops serving the mobile client before it returns within network
range, and all server connections are lost.
The only reasons the Home Router might not see a NetWare Mobile IPX
watchdog packet from a mobile client are that the client is off, in sleep
mode, or out of range.
Allow HR Change=[On|Off]
This command determines what IPXODI does when the current Home
Router is no longer reachable.
If you set Allow HR Change to On , IPXODI tries to sign on with the first
available Home Router, even if it is not the same as the current one.
If you set Allow HR Change to Off , IPXODI continues trying to
reestablish a connection to the Home Router to which the client is
currently attached.
If Allow HR Change is not defined, IPXODI assumes Allow HR Change
is set to Off ; if it is set to On , and the current Home Router stops
operating, IPXODI obtains a different virtual address while signing on
with a different router. Most applications available today cannot operate
102 Internetwork Packet Exchange