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TCP IP Address

 
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Kevin Raven (UK)
Frequent Advisor

TCP IP Address

Quick question.
Where does the unique IP address per node get written to ?
i.e. ALPHA1 = 10.10.10.100 = ALPHA1.KEVIN.COM
ALPHA2 = 10.10.10.200 = ALPHA2.KEVIN.COM
Both servers use interface EIA0: for IP trafic.
If all IP details are recorded in the following common files ....
$ dir sys$system:*tcp*.dat

Directory SYS$COMMON:[SYSEXE]

TCPIP$CONFIGURATION.DAT;1 TCPIP$HOST.DAT;1 TCPIP$NETWORK.DAT;1
TCPIP$PROXY.DAT;1 TCPIP$ROUTE.DAT;1 TCPIP$SERVICE.DAT;1

Total of 6 files.
$

How does during boot ALPHA1 know its details and ALPHA1 known what to read from the file.

My guess is that it uses mac address of the card to find the correct IP address ?


3 REPLIES 3
Volker Halle
Honored Contributor
Solution

Re: TCP IP Address

The TCPIP configuration file is indexed by the SCSNODE name of the system. So TCPIP can find the interface name and IP address and other node-specific parameters based on the nodename of the node, on which it is being started.

Volker.
Kevin Raven (UK)
Frequent Advisor

Re: TCP IP Address

Ah ...makes sense.

Thanks for the quick reply.

Hoff
Honored Contributor

Re: TCP IP Address

A write-up of where the node names and the node addresses get written with OpenVMS:

http://64.223.189.234/node/589