Dnia poniedziałek, 11 grudnia 2006 18:34, Leandro Melo de Sales napisał:
> config_eth0=( "192.168.1.2 netmask 255.255.255.0"
> "192.168.1.3 netmask 255.255.255.0"
> "192.168.1.6 netmask 255.255.255.0"
> )
Well, it is a design flaw to have 3 addresses in overaping networks. From what
I recall you may use only one non /32 address in a network. If the
requirement is not met, problems arise:
Problem: You want to broadcast to 192.168.1.255.
Question: From which of these addresses should it origin?
Problem: Someone else broadcasts to 192.168.1.255.
Question: Which of these addresses should catch it? One? All?
I was taught that configurations of multiple-ip-per-net should look like:
config_eth0=( "192.168.1.2 netmask 255.255.255.0"
"192.168.1.3 netmask 255.255.255.255"
"192.168.1.6 netmask 255.255.255.255"
)
Only the first has a regular mask (and therefore is source and target for
broadcasts) - the rest has /32 mask and is only valid for unicast
communication.
AFAIK this is true for both multiple cards on single network and multiple
aliases on single card.
--
Pawel Kraszewski
www.kraszewscy.net
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