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gateways_04_overview.fm
Supported Gateways
HG 3500 V4 (Common Gateway)
44
Figure 15
Standby gateways can be located in the host system and/or on an IP Access
point. The only requirement is that all active and standby line gateways have
to reside in the same local IP subnet.
IMPORTANT: Standby gateways and IP clients have to reside within the
same system!
E.g.: a standby gateway located in one system cannot control IP clients
controlled normally by a gateway located in another system.
Standby gateways at IP Access Points will not protect IP users at the host
against a host failure because failures at higher levels (e.g. shelf, AP, host or
power failures) will not automatically trigger a switchover.
For configuration purposes please refor to
3500".
•
The HG 3500 V4 gateway supports secondary gateways that provide full
redundancy to IP subscribers. Providing full redundancy for IP clients via
secondary gateways will protect against higher level failures, like entire
Access Point or host failures.
More detailed information on secondary gateways
In order to protect against higher level failures (e.g. Access Point, host
failures) secondary gateways can be added to the system. A secondary
gateway is an additional, fully configured gateway for an IP client located
anywhere within a HiPath 4000 system. Note that each IP user that is backed
up via a secondary gateway will have 2 extensions, e.g. x1333 on the primary
gateway and extension x5333 on the secondary gateway.
In case communication to the primary gateway is lost (e.g. due to a shelf or
host failure), the IP phone will attempt to register with the secondary gateway.
As long as the secondary gateway is operational and IP connectivity is
available, all phones backed up with secondary gateways will register with
their secondary gateway and will be fully operational.
HiPath 4000 V5, IP Solutions - HG 3500 & HG 3575, Service Documentation
HG 3500 Standby Gateway Operation
A31003-H3150-S104-2-7620, 03/2009
Chapter 10, "Standby Board HG
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