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Hardware Reference
C613-03060-00 REV H
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Line cards. Equivalent cards can be exchanged without having to
reconfigure the switch. For example, if an AT-SB-4311 line card is
removed and replaced with a new AT-SB-4311 (in the same bay), the
new card will use the original card's configuration (as long as the switch
is not restarted before the new card is installed).
The next section describes the configuration effects of hot-swapping a
line card.
Hot-swapping a Line Card
Line cards can be hot swapped without requiring without requiring any
notification to the switch. The SwitchBlade detects that a card is being removed
and sets itself to a safe state. Insertion of any card into the SwitchBlade is
detected and initialised automatically.
Hot-swapping line cards has the following scenarios:
A bay was previously empty and a card is being hot swapped in.
The line card powers up with no configuration, adding all of its ports to the
default VLAN.
A bay was previously occupied and a different card type is being hot
swapped in.
The line card powers up and is configured exactly as if the bay were
previously empty. Previous interfaces marked as swapped out for this bay
are replaced with new card interfaces.
A bay was previously occupied and the same card type is being hot
swapped in.
The previous VLAN configuration for the card is restored to its previous
condition and previous trunking settings are restored. Interfaces registered
against this card are marked up or down as appropriate. Switch table
entries are restored except for entries that are timed to allow natural expiry
(for example, MAC and IP multicast).
A line card is being removed from a bay.
Interfaces registered against this card are marked as swapped out. All
other modules treat these interfaces as being present but no longer active.
Before hot-swapping a line card out of the switch, we recommend that you
save the current configuration by using the command:
create config
Reconfiguring During Hot swap
After a line card has been hot swapped out, the switch can be reconfigured
before the removed line card is returned. The new configuration can be saved
by using the command:
create config
References to the missing ports are retained in the switch's memory. The
configuration appears the same as if the line card had not been removed. To
display it, use the command:
show config dynamic
When the line card is hot swapped in again, whether its original configuration
is restored depends on the following factors:
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