3Com CoreBuilder 7000 Operation Manual page 208

208 C 10: S
HAPTER WITCH
R
EDUNDANCY


PVC robustness, i.e., PVC connections are not lost during the
switch-over. Single cells are lost.


A switch is ready to re-establish SVC connections after no more than 7
seconds.


Manual database configuration is not required.


Full configuration stored in the active switching module's flash is
automatically replicated to the redundant switching module's flash.


Inherent ELAN names and LES ATM addresses of the redundant
switching module are the same as those of the active switching
module after the switch-over.


All software files can be downloaded from the active to the redundant
switch. The download is initiated manually via LMA and NMS. The
transient period necessary for the software download from the
primary switch engine to the redundant one is about 10 minutes.


A transient period of not more than 3 minutes is needed to
synchronize configuration of the redundant switching module after it
is populated.


NMS manipulation over the redundant switch is supported. This
includes software download from the active to the redundant switch.


Artificial ARP response is generated upon switch-over to update the
router ARP table.


WarmStart trap is sent upon switch-over.


Interface card for inter-switch communication may be selected
manually via LMA only.


Suspended mode of the redundant switch is supported, enabling the
active switch to function as active again after the switch-over. This is a
default mode.


Software reset of the redundant switch in suspended mode sets it to
the redundant state.


The activity LED of the primary switch blinks frequently (4 times per
second) during the synchronization process between two switch
engines.


New LMA screens have been developed to control and show switch
redundancy functions.