topic Re: TCP IP Address in Operating System - OpenVMS

TCP IP Address

Kevin Raven (UK) — Fri, 28 Nov 2008 13:08:15 GMT

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 ?

Re: TCP IP Address

Volker Halle — Fri, 28 Nov 2008 13:27:39 GMT

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.

Re: TCP IP Address

Kevin Raven (UK) — Fri, 28 Nov 2008 13:35:01 GMT

Ah ...makes sense.

Thanks for the quick reply.

Re: TCP IP Address

Hoff — Fri, 28 Nov 2008 16:37:47 GMT

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

http://64.223.189.234/node/589