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LCS60 Configuration and Connection for SLIP Service
Reserved IP Address
The user requests a reserved IP address by omitting the -D option on his/her
data switch dialstring and by having a negotiable IP address administered in
his/her client software package. The reserved IP address must be centrally
administered by the LCS60 administrator prior to the user’s call. To find that
user’s reserved IP address, the LCS60 searches its configuration database with
both the IP network security group name and the user ID field. The latter value
is extracted from the -u option appended to the data switch dialstring by the
NAC. In the absence of a NAC or an explicit -u option, the user ID defaults to
the value guest. If the LCS60 does not find a reserved IP address for the given
combination of the IP network and user ID, then the session start up request is
assigned a dynamic IP address.
If the reserved IP address is allocated when a second session setup attempt is
made for the same user ID, the call is refused with a "slip is busy" error (refer also
to Appendix C). A given user ID can have multiple reserved IP addresses, one
for each of the IP network security groups that has been configured on a LCS60.
To reserve specific addresses for users:
Use the ipas command (refer to Screen 5-2)
Select option 2 to display the RESERVED IP ADDRESSES FOR SLIP
AND PPP SERVICES menu
Select option 1 from this menu.
This will prompt for the login ID, group, and address as shown in Screen 5-2. If
you are using a NAC, the User Login Id is the NAC ID, otherwise, enter your
own unique login ID. In the example in Screen 5-2, user tbaker is assigned the
address 154.12.23.7 in the group morse.
Note: Reserved IP addresses can only be allocated by the system administrator
or someone with root permissions.
To obtain a reserved address from the LCS60, the dialstring is:
Issue 3 5-11