* Connection remains in the ESTABLISHED state when the virtual IP is down.
@ 2016-02-04 7:49 Arkadiusz Bubała
0 siblings, 0 replies; only message in thread
From: Arkadiusz Bubała @ 2016-02-04 7:49 UTC (permalink / raw)
To: netdev
Hello,
I encountered following issue:
when I connect with NFS server through virtual IP then I remove this IP
netstat still shows that connection is ESTABLISHED. When I put down
whole interface all ESTABLISHED connections disappear. The kernel
version is 3.10.92.
How to reproduce.
create virtual IP:
ip addr add 88.88.88.1/24 dev eth0 label eth0:0 (or ifconfig eth0:0
88.88.88.1)
then make connection from the NFS client. In netstat there is:
tcp 0 0 88.88.88.1:2049 88.88.88.2:765 ESTABLISHED-
and delete virtual IP:
ip addr del 88.88.88.1/24 dev eth0 (or ifconfig eth0:0 down)
the netstat still shows that conneciton is ESTABLISHED and remains in
that state for about 5 minutes. Even if I recreate virtual IP I can't
access to the server until it disappears.
When the whole interface is put down (ifconfig eth0 down) the netstat
doesn't show any entries for my virtual IP and if I put it up again I
can access to the server immediately.
Shouldn't the ESTABLISHED connections be removed also when virtual IP is
down? Or maybe there is any sysctl option to change that behaviour?
--
Best regards
Arkadiusz Bubała
Open-E Poland Sp. z o.o.
www.open-e.com
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