On Tue, 22 Jul 2008, Marco Lorig wrote:
Iīve read the section but as i understand correctly the
only solution in a LVS-NAT env is to set the MTU by hand
on each route or interface on the realservers, which
unfortunately I havenīt access to.
Ratz's solution is on the director, and sets the MTU for the
We have been running this env since 2002 with Kernel
2.4.19 with no problems (running director on
gre_interface). Actually we have upgraded our systems to
kernel 2.6.18 which causes this problems.
a lot of stuff broke going to 2.6.x
The gre tunnel exists between the directors because of
failover reasons ( each director is located in a seperate
datacenter interconnected by WAN).
Copying files like this:
Client ---scp----> Director ---GRE Tunnel nopmtudisc --> Director ----scp --->
Server and vice versa.
not sure what you're doing here. Is it one connection with
I assume you have two directors in some standard failover
setup and only one is directing when your LVS is up?
works fine but if the ipvsadm is enabled on the second
director to serve multiple servers, the mtu problem
the copy has nothing to do with LVS? ie you can do the copy
when there is nothing in the ipvsadm table in the 2nd
(inactive) director, but as soon as you put entries into
ipvsadm on the backup director, the gre tunnel breaks?
If so, are there any entries you can put into ipvsadm that
won't break the tunnel? Are the any which guarantee to break
the tunnel? What if the ipvsadm table is empty on the active
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
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