Nortel 1000E Upgrade page 215

Appendix A: Upgrading to a High
Availability system
Contents
Campus Redundancy (High Availability) Package Support
Campus Redundancy with co-located Call Servers
Communication Server 1000E Upgrade
The CP PM CS project introduces a package for enabling and disabling the
Campus Redundancy or High Availability (HA) feature. Software performs a
check to determine whether the HA package is present in the keycode. If the
package is present, then the CP PM call server will behave in the same way
as the Release 4.5 CP II or CP IV (for example, it will use the HSP to try to
detect the presence of the other core). If the other core is detected, then both
the cores will negotiate to determine which core is the active core and which
core is the standby core.
If the CP PM call server is not able to detect the other core, then it will come
up as a single core system. If the HA package is not present in the keycode,
then the existing call server software is modified to block the HSP connection
so that the CP PM call server will not attempt to detect the presence of the
core. In the absence of the HA package, the CP PM call server will run as a
single core system even in a system with two cores and the HSP ports on both
cores are connected.
Figure 130 on page 216
system with co-located call servers. Utilizing the dual homing feature of the
MGC, the ELAN of the CP PM call server/MGC and the TLAN of the
Signaling Server/MGC is dual homed to the Baystack switches. If one of the
depicts the configuration of the CS 1000E CP PM
Option 11C Chassis to Communication Server 1000E
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