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On Wed, Feb 02, 2005 at 08:45:32AM +0000, Monty Ree wrote:
>
> Hello, all.
>
> I have one question about the VIP at LVS-DR.
> Some manuals say that VIP at the Director should be set like below.
>
> 1)
> ifconfig eth0:0 192.168.10.10 netmask 255.255.255.255 broadcast
> 192.168.10.10 up
>
> But I set like below and works well.
> 2)
> ifconfig eth0:0 192.168.10.10 netmask 255.255.255.0 broadcast
> 192.168.10.255 up
>
> Surely, if RealServer, should be set like 1) because of arp problem,
> But this is a LVS-DR Director and it needs not set like above.
>
> I don't know why should like above(1) at Director too.
> I have operated some LVS-DRs and 1), 2) works well together.
> Which is right?
1) looks wrong, but probably works in practice as you will
likely get the effect of 2) which looks correct to me.
Now, interfaces on lo:0, that is another story, because
loopback interfaces cover _all_ off the addresses in
their netmask, where as all other types of interface that I know of,
and in particular, eth interfaces, only cover one address.
To clarify.
ifconfig eth0:0 192.168.10.10 netmask 255.255.255.0 broadcast 192.168.10.255 up
-> Add 192.168.10.10 to eth0
ifconfig lo:0 192.168.10.10 netmask 255.255.255.0 broadcast 192.168.10.255 up
-> Add 192.168.10.0 - 192.168.10.255 to lo
ifconfig lo:0 192.168.10.0 netmask 255.255.255.0 broadcast 192.168.10.255 up
-> Same as above, add 192.168.10.0 - 192.168.10.255 to lo
ifconfig lo:0 192.168.10.10 netmask 255.255.255.255 broadcast 192.168.10.10 up
-> Add 192.168.10.10 to lo
--
Horms
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