User's Manual 658 Document #: LTRT-89730
Mediant 3000
37.3 Blade Failure Detection
Upon detection of a blade failure, the following occurs:
Active blade failure: the redundant (standby) blade issues a switch-over operation.
As part of this switch-over operation, the failed blade is reset and the previously
redundant blade becomes the active blade in Simplex mode until a redundant blade is
detected. The previously active VoP blade only reboots from its flash (and not from the
BootP/DHCP) to ensure that it's operating with the same software version and
configuration it received from the active VoP blade. If the failure in the active blade is
repaired after reset, it is initialized as the redundant blade and the device returns to
HA mode.
Redundant blade failure: the active blade resets the redundant blade and moves
itself into Simplex mode until the redundant blade is returned to functional operation. If
the failure in the redundant blade is repaired after reset, it's initialized as the redundant
blade once again and the device returns to HA mode.
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