[Sunhelp] Adding alias IP addresses to a NIC

[Steve Kennedy]

Would it be possible to use DHCP with an aliased interface? (ie, hme0:1) and
is it possible for other machines to indentify which machines are
"multihomed"?  

Steve Kennedy


-----Original Message-----
From: Dale Ghent [mailto:daleg at elemental.org]
Sent: Tuesday, February 22, 2000 12:36 PM
To: 'sunhelp at sunhelp.org'
Subject: Re: [Sunhelp] Adding alias IP addresses to a NIC


On Tue, 22 Feb 2000, Pearson, David wrote:

| Can someone tell me a little about how an alias IP address works and how
do
| I set one up?

IP aliasing is giving an interface (le0, hme0, ge0, etc) more than one IP
address. They're more like sub-interfaces. For example:

hme0 has the main IP of that interface.

hme0:1 is the first IP alias
hme0:2 is the second
and so on.

you can configure an alias on a running interface with the command:

ifconfig <interface>:<alias number> <ip address> up

or

ifconfig hme0:1 206.221.135.60 up

To make the alias reappear after a reboot, make a file in /etc named
"hostname.<interface>:<alias number>" (ex: "hostname.hme0:1") that
contains the IP address of that alias (or, just the hostname of that
alias, and put the IP in /etc/hosts)

/dale


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