Changes for page Open vSwitch

Last modified by Sebastian Marsching on 2022/05/29 14:05
From version 5.1
edited by Sebastian Marsching
on 2022/03/27 15:40
Change comment: There is no comment for this version
To version 6.1
edited by Sebastian Marsching
on 2022/05/29 14:05
Change comment: There is no comment for this version

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110 110  You also do not have to make the changes to `failsafe.conf`. The system will boot fine without those changes.
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112 -# Using Open vSwitch for a high-availability / fail-over interface
112 +# {{id name="fail-over-interface"/}}Using Open vSwitch for a high-availability / fail-over interface
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114 114  A simple HA setup for an IP address can easily be created using [Pacemaker](http://clusterlabs.org/) and the `ocf:heartbeat:IPaddr2` and `ocf:heartbeat:IPv6addr` scripts. However, this kind of setup has one weakness: During fail-over, the MAC address changes because the IP address is now associated with a different computer and thus a different NIC. This can cause problems with old entries in ARP tables. Linux systems will typically deal with this correctly (they will see the unsolicited ARP message and update their caches), but some other operating systems or dedicated network equipment might cause trouble. For example, I had problems with the ARP cache of a Netgear GSM7328v2 switch, which could only be resolved by waiting a long time or manually clearing the ARP cache. Obviously, both options are not viable for an HA setup, where fail-over has to happen automatically and within seconds.
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