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multi-homed hosts in /etc/hosts, NIS and DNS

multi-homed hosts in /etc/hosts, NIS and DNS

Post by Paul Burr » Tue, 23 Dec 1997 04:00:00



What is the proper way to define multi-homed hosts when using NIS?

When using DNS, I have always advocated using a single host name
and multiple A records and left it up to the client's resolver
library to sort the addresses appropriately with a sortlist
directive in /etc/resolv.conf.
 ie.    sunhost         IN      A       192.168.214.100
                        IN      A       192.168.215.100

I recently learned by accident that NIS also supports multi-homed
hosts.

ie.     192.168.214.100         sunhost
        192.168.215.100         sunhost

After a little experimentation it looks like the NIS
resolver library will return an address on the client's subnet or
a random address.  But it only ever seems to return one address
in the h_addr_list array in the hostent structure.

Now, my questions are:
1. Exactly how is this supposed to be used?
2. Do people use this?  I've *never* seen it used.
3. Are you supposed to have a unique primary name or alias for each
interface?

Thanks..Paul

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I am setting up a couple of NIS domains on the same physical LAN.  Will not
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1) What the official-host-name is? Is it hostname or hostname | domainname?
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