Cisco Cisco Administrative Workstation Guide De Montage
Chapter 5 Peripheral Gateway Configurations
PG Platform Options
5-4
Cisco ICM Enterprise Edition Pre-installation Planning Guide Release 6.0(0)
the same time. For example, in
PIMs 1 and 2 are active on Side A; PIM
3 is active on Side B. The duplexed OPCs communicate with each other through
the MDS to ensure that a PIM is active only on one side at a time.
the MDS to ensure that a PIM is active only on one side at a time.
The duplexed PG architecture protects against a failure on one side of the PG. For
example, if an adapter card controlling access to an ACD fails, a hot standby PIM
can use the alternate PIM activation path. As shown in
example, if an adapter card controlling access to an ACD fails, a hot standby PIM
can use the alternate PIM activation path. As shown in
, PIM3 has been
activated from Side B of the PG. This might be in response to an adapter failure
between the Side A PIM3 and ACD3.
between the Side A PIM3 and ACD3.
In this type of failure scenario, the PG is able to maintain communication with the
attached ACD.
attached ACD.
Only one PG Agent actively communicates with a side of the Central Controller.
When messages arrive at the Central Controller, they are delivered to both sides
by the Central Controller Synchronizer process. The PG maintains idle
communication paths to both sides of the Central Controller in case a switch-over
to the other side of the Central Controller or PG is necessary.
When messages arrive at the Central Controller, they are delivered to both sides
by the Central Controller Synchronizer process. The PG maintains idle
communication paths to both sides of the Central Controller in case a switch-over
to the other side of the Central Controller or PG is necessary.
PG Platform Options
A maximum of two PGs can run on a single hardware platform. A single PG can
serve only one type of ACD, but can also (as of ICM 5.0) contain one or more
VRU PIMs and/or Media Routing PIMs provided that the server hardware has the
capacity to support the aggregate processing load. For a single hardware platform
to serve two different types of ACDs, you need two PGs—one for each peripheral
type.
serve only one type of ACD, but can also (as of ICM 5.0) contain one or more
VRU PIMs and/or Media Routing PIMs provided that the server hardware has the
capacity to support the aggregate processing load. For a single hardware platform
to serve two different types of ACDs, you need two PGs—one for each peripheral
type.
shows some possible PG options.