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Dear all,
If anyone may give some advice to my concerns, it would be very helpful
and would like to appreciate.
1) Gratuitous ARP interval
I'm setting two nodes cluster with heartbeat and checked the timing
when the gratuitous arp broadcast, using tcpdump.
I found the packet broadcasted when the fail over occurs, but it
looks likes never be broadcasted at regular intervals.
If so, when the router facing to WAN, missed to receive the arp, due
to network congestion, etc, the service would be unavailable till
the arp cash expires.
Is it possible to set to broadcast gratuitous arp constantly from
active server, regardless of the failover?
2) Strange phenomenon
I set static MAC address table corresponds to virtual ip (10.0.0.1)as
BBBBBBBBBB(MAC address of Back up), experimentally on my client pc.,
and made ping test to virtual ip(10.0.0.1).
Actually, it replies.
Is it nomal phenomenon? If so, is there any considerable negative effect?
※I tried arp request fo 10.0.0.1 many times, and all the reply was
collect(Address of Active Server).
Cannot find output of virtual interface eth0:0 in BackUP
Server(Normal).
I'm using IPVS v1.0.2 with debian kernel 2.4.22-1-ipvs-386
Virtual IP
=============
10.0.0.1
LVS Server 1 VS Server 2
================= ===============
(Active) (BackUP)
IP:10.0.0.2 IP:10.0.0.3
MAC:AAAAAAAAAAAA MAC:BBBBBBBBBBBB
Thank you very much to reply me everytime with kindness.
Kido
Regards.
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