[Linux-HA] (no subject)

[Lars Marowsky-Bree]

On 2005-07-21T04:36:07, Alan Robertson <alanr at unix.sh> wrote:

> An ifdown is COMPLETELY different from a cable pull.

Yes. But with people hotplugging stuff in and out, something to test
anyway.

> A _firewall rule_ would be the same.

No, it's not. A firewall rule for example doesn't change the link
status, which some NICs interpret differently - you'll get write/send
failures with that, but not with a fw rule. (Which is evaluated later.)

But yes, testing how heartbeat handles error replies ("admin
prohibited") when someone sets up a firewall to reject UDP traffic is
also important.


Sincerely,
    Lars Marowsky-Brée <lmb at suse.de>

-- 
High Availability & Clustering
SUSE Labs, Research and Development
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