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Joseph Mack NA3T wrote:
> On Tue, 3 Jul 2007, Tim Mooney wrote:
>
>
>> In regard to: [lvs-users] arp_ignore issues, Jacob Smullyan said (at
>> 5:48pm...:
>>
>>
>>> Hi --
>>>
>>> I have an LVS-DR cluster that has been running for years; its realservers
>>> have linux 2.4 kernels and I use the noarp module to hide the VIP. I now
>>> want to add realservers with 2.6 kernels (2.6.20 at the moment), and am
>>> attempting to use arp_ignore and arp_announce to solve the arp problem as
>>> follows:
>>>
>>> # from sysctl.conf
>>> net.ipv4.conf.all.arp_ignore = 1
>>> net.ipv4.conf.all.arp_announce = 2
>>> net.ipv4.conf.eth0.arp_ignore=1
>>> net.ipv4.conf.eth1.arp_ignore = 1
>>> net.ipv4.conf.eth0.arp_announce = 2
>>> net.ipv4.conf.eth1.arp_announce = 2
>>>
>> We're using
>>
>> net.ipv4.conf.lo.arp_ignore = 1
>> net.ipv4.conf.lo.arp_announce = 2
>> net.ipv4.conf.all.arp_ignore = 1
>> net.ipv4.conf.all.arp_announce = 2
>>
>
> it's in the HOWTO as well
>
> http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.arp_problem.html#2.6_arp
That HOWTO says:
On the realservers the VIP will still be on lo (as for the hidden
method). If the reply packets to the client are routed through eth0,
then the arp announcements/requests are made through eth0 and you
will apply the arp_ignore/arp_announce sysctls to eth0, not to lo
(you cannot use arp_ignore/arp_announce on lo).
Mr. Mooney's settings apply the sysctls to lo, however. I think my
settings, above, are consistent with the HOWTO -- or am I mistaken?
js
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