On 2015-04-22 3:57 pm, Les Mikesell wrote:
On Wed, Apr 22, 2015 at 2:49 PM, David Both
<db...@millennium-technology.com> wrote:
Yes confusion will abound. There should only ever be one and only one
DHCP
server on any network. With two you will sooner of later have multiple
DHCP
client hosts with the same IP addresses.
No, it's not going to give out duplicate IPs. The dual servers are
configured as primary/secondary and know about each other with some
protocol to track what leases are already out.
https://kb.isc.org/article/AA-00502/0/A-Basic-Guide-to-Configuring-DHCP-Failover.html
My question is just about multiple IPs as aliases on the server side.
So far it looks like it is always sending with the same source IP
even though it logs that it used the alias interface name. I'm just
wondering if it would confuse clients if it gets an IP from one source
and subsequent ACKs from another. But, I guess that has been
happening for a long time already with the dual server setup.
This is normal behavior. When you have multiple IPs aliased on a system,
they all answer for inbound, but the outbound traffic always shows the
primary system IP as the source.
You might be able to finagle some sort of firewall SNAT rules to fake
it, but I've never tried that, so I can't vouch for the viability of
such a notion.
--
Mike Burger
http://www.bubbanfriends.org
"It's always suicide-mission this, save-the-planet that. No one ever
just stops by to say 'hi' anymore." --Colonel Jack O'Neill, SG1
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