After you have received your Network 21 IP address allocation, you will assign a unique IP address to each network device in your area. In addition, it is recommended that you register an IP host name for each network device.
If possible, send your host name registration request 2 weeks prior to your actual cutover date.
You can request a list of the currently registered host names on your UCDNet subnet by sending an e-mail message to hostclerk@ucdavis.edu. Include your current IP address range and your Employee ID number. The Host Name Clerk will return a list of the host names that are registered for those IP addresses. Note: If you are uncomfortable giving your Employee ID in an e-mail message, please give your full name instead.
Since a host name is registered to a unique IP address, and since the IP address of a network device will change when it is cut over to the Network 21 infrastructure, you must inform the Host Name Clerk of the new IP address for each network device in your area that will be cut over to the Network 21 infrastructure.
You may choose to retain your current host names, or select new ones as you cut over to the Network 21 infrastructure.
For instructions on retaining your current host names or requesting new ones, see How to Register Host Names for the Network 21 Infrastructure.
Note: You can retain only those host names already assigned to IP addresses in your area. You cannot use host names registered to other departments.
If you are dissatisfied with the host names that are currently registered for your network devices, you may select new host names. For more information, see How to Dream Up a Host Name. Note: I.T. does not assign host names; host name registration has always been at the discretion of the department network administrator.
If you don't yet have registered host names for your network devices, you may select host names now. For more information, see How to Dream Up a Host Name.
Ideally, your host name registration conversion will occur during your cutover downtime window. In the ideal case, you'll prepare for the host name conversion prior to your cutover date; the host name conversion processing will occur at the same time your network is down for cut over; your new host name registrations will be ready when your computers come back on-line on the new Network 21 infrastructure.
Timing is especially important when it comes to your department's Internet servers ( e.g., Web server ). If the host name re-registration for your network server does not coincide with the Network 21 IP address cutover, people will be unable to connect to your server by its host name.
The next section explains how to stage your host name registration requests so that re-registration occurs on the same date as your Network 21 cutover.
Note: IP addresses for the Network 21 infrastructure
will begin with 169.237. Most IP addresses on the
current UCDNet infrastructure begin with 128.120.
Your host name requests will be stored in a file and processed by
a program. You must use a specific syntax in your host name request.
For more information about the syntax, refer to the
Net21 Host Name Registration Examples
in this
section and/or see
More About the Host Name Request Syntax
below.
Include your Employee ID number and your current UCDNet
subnet number in your host name request. Note: If you are
uncomfortable giving your Employee ID in an e-mail message, please
give your full name instead.
Also include the projected date of your Network 21 cutover.
For each host, specify two items on a single line, separated by
whitespace ( i.e., space characters or TABs ). The two items are:
If possible, send your host name registration request
in about 2 weeks prior to your actual cutover date.
The Host Table Clerk will run your file through a preprocessor
to check for errors. You will be contacted if any discrepancies
are found.
Note: If you are the administrator for more than one network subnet,
please separate them in your
e-mail message, or send a separate e-mail for each subnet.
Once any discrepancies have been resolved,
your host name
requests will be queued for processing on your cutover date.
You will receive a confirmation notice when your host name registrations
have been completed.
When your UCDNet subnet is retired, host names that have not been
re-registered as Network 21 IP addresses will be released automatically
and will be available for others to use for IP addresses.
As a courtesy,
you may send an e-mail message to the Host Name Clerk to explicitly abandon
host names that you no longer plan to use.
Example ( Release Host Names ):
Example ( New, Re-Register and Release Host Names ):
The e-mail message you send to the Host Table Clerk should contain
a series of host name registration commands.
Begin your requests with a 'clientid' and a 'oldnet' command.
You may then add as many 'host', 'delete', 'cname' and 'mx'
commands as needed.
An example file might look like this:
Note: If you are
uncomfortable giving your Employee ID in an e-mail message, please
give your full name instead.
Example: clientid 12345678
Example: oldnet 128.120.180
The host name and IP address are required.
Example: build leonardo.ucdavis.edu 169.237.180.1
How the command is processed:
Example: destroy pc1.ucdavis.edu
Example: cname cibola.ucdavis.edu mojave.ucdavis.edu
Example: mx vermicelli.ucdavis.edu pasta.ucdavis.edu
A formal, fully qualified host name will always end in 'ucdavis.edu'.
Examples of host names already on UCDNet:
It can be fun to name computers according on a theme.
For example, hosts at I.T. Express are named after types of pasta; hosts
in the I.T. Scientific Visualization lab are named after famous
painters.
Just like an IP address, each host name must be unique in the
'ucdavis.edu' domain. You should check a prospective new host name
against the names
already registered in the 'ucdavis.edu' domain.
To do this, login on one of the I.T. UNIX hosts (e.g, isun.ucdavis.edu)
and use the 'nslookup' command. Example:
Note: The information in this document is specific to configuration for Network 21 cutover. For more information about IP Addresses and UCDNet configuration consult the on-line document: ‘NAR FAQs: Internet/UCDNet: Software and Information'
Receive Net21 IP Address Range and Cutover Date
You should receive your Net21 IP address range assignment
and your scheduled Net21 cutover date about one month
prior to the actual cutover date.
Prepare Host Name Registration Request File
It is possible that on-line host name registration will be available in
the future. For now, you must register host names by e-mail. Send
all host name requests to hostclerk@ucdavis.edu
Send E-mail to Host Name Clerk
Send
all host name requests to hostclerk@ucdavis.edu
Your host name registration file will be processed by
a program. It is important that you send your information
as regular text in the body of the message.
The host clerk will not be able to decode and translate
file attachments ( a limitation of the e-mail reader
on the system that processes the host name requests ).
Net21 Host Name Registration Examples
Example ( Request List of Existing Host Names ):
To: hostclerk@ucdavis.edu
Subject: list of existing host names
Please send me a list of existing host names.
Employee ID: 1234578
UCDNet Subnet: 128.120.180
Example ( New Host Names ):
To: hostclerk@ucdavis.edu
Subject: new host names for Network 21
Please register these new host names. My Network 21 cutover
date is 07/08/98.
clientid 123456789
oldnet 128.120.180
build leonardo.ucdavis.edu 169.237.180.1
build rafael.ucdavis.edu 169.237.180.2
build donatello.ucdavis.edu 169.237.180.3
build michaelangelo.ucdavis.edu 169.237.180.4
Example ( Re-Register Host Names ):
To: hostclerk@ucdavis.edu
Subject: re-register host names for Network 21
Please re-register these host names. My Network 21 cutover
date is 07/08/98.
clientid 123456789
oldnet 128.120.180
change leonardo.ucdavis.edu 169.237.180.1
change rafael.ucdavis.edu 169.237.180.2
change donatello.ucdavis.edu 169.237.180.3
change michaelangelo.ucdavis.edu 169.237.180.4
Note: This assumes that the existing UCDNet IP addresses belong to hosts
in your department. (You cannot use host names from IP addresses
outside your department.)
To: hostclerk@ucdavis.edu
Subject: release host names
Please release these host names. My Network 21 cutover
date is 07/08/98.
Please release these host names:
clientid 123456789
oldnet 128.120.180
destroy mac1.ucdavis.edu
destroy mac2.ucdavis.edu
destroy pc1.ucdavis.edu
destroy pc2.ucdavis.edu
You may combine new registration, re-registration and release
commands in a single e-mail message.
To: hostclerk@ucdavis.edu
Subject: host names for Network 21
Please register these host names. My Network 21 cutover
date is 07/08/98.
clientid 123456789
oldnet 128.120.180
build leonardo.ucdavis.edu 169.237.180.1
build rafael.ucdavis.edu 169.237.180.2
build donatello.ucdavis.edu 169.237.180.3
build michaelangelo.ucdavis.edu 169.237.180.4
destroy mac1.ucdavis.edu
destroy mac2.ucdavis.edu
destroy pc1.ucdavis.edu
destroy pc2.ucdavis.edu
More About the Host Name Request Syntax
The Host Table Clerk will use the information in your e-mail message
to prepare a
file with your host name requests. The file will be processed by
a program.
The Host Table Clerk will run your file through a preprocessor
to check for errors. Once any discrepancies have been resolved,
your host name
requests will be queued for processing on your cutover date.
clientid 123456789
oldnet 128.120.226
change blythe.ucdavis.edu 169.237.42.1
build clientid mojave.ucdavis.edu 169.237.42.2
cname cibola.ucdavis.edu mojave.ucdavis.edu
And the confirmation might look like this:
Reply to : hostclerk@ucdavis.edu
From: hostclerk@ucdavis.edu
To: [requester]@ucdavis.edu
As requested, hostnames listed below have been registered and will become effective after 5:30 pm today. Hostnames whatchacallit.ucdavis.edu and someonesname.ucdavis.edu are currently register. Please revise your hostname selection and resubmit your request. Please state time constraints, if any.
Regards,
UCD Host Name Clerk
Possible Commands:
clientid employeeid
oldnet aaa.bbb.ccc
build hostname aaa.bbb.ccc.ddd
change hostname aaa.bbb.ccc.ddd
destroy hostname
cname aliasname realname
mx hostname exchanger
Brief Descriptions of the Commands:
How to Dream Up a Host Name
In general, a host name should be about 8-12 characters long, without
special characters. It is permissible to use host names shorter than 8
characters or longer than 12 characters. You may use letters, digits
and dashes ( '-' ) in your host name; do not use underscores ( '_' ) or
other special characters.
isun.ucdavis.edu gopher.ucdavis.edu terrapin.ucdavis.edu
chip.ucdavis.edu news.ucdavis.edu vermicelli.ucdavis.edu
request.ucdavis.edu directory.ucdavis.edu shakedown.ucdavis.edu
monet.ucdavis.edu ftp.ucdavis.edu minglewood.ucdavis.edu
There are many ways to come up with host names. You can let each
person choose the host name for their computer. You may choose to name
a computer by its owner's name. You may choose to name computers by a
person's job function.
chip% /usr/sbin/nslookup monet
Server: localhost
Address: 127.0.0.1
Name: monet.ucdavis.edu
Address: 128.120.4.10
chip% /usr/sbin/nslookup vermicelli
Server: localhost
Address: 127.0.0.1
Name: vermicelli.ucdavis.edu
Address: 128.120.180.80
chip% /usr/sbin/nslookup foobar
Server: localhost
Address: 127.0.0.1
*** localhost can't find foobar: Non-existent domain
In these examples, 'monet' and 'vermicelli' are already registered;
you cannot select either of those names for your new host name.
'foobar' is available.
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Administration by: WebKeeper
- Editing corrections to: Erin Magers
Last modified 6/10/98