Standard (Simplex) Reliability Configuration - Avaya S8700 Series Manual

The following are the rules and guidelines for placement of IPSI circuit packs.
Rules:
When placing an IPSI in a DS1-C-remoted port network, make sure that the non-remoted
IPSI is administered first and that the IP Control field is set to y. The IPSI in the
DS1-C-remoted PN does not have to be set to no. However, if it is set to y, customers
need to run Ethernet from the IPSI and there is limited control (1:2 versus 1:5).
The reference IPSI (the one whose serial number is used in the license file) is placed in
the PN with the shortest Ethernet connection to the media servers. This minimizes the
amount of data network that could fail between the IPSI and the media servers causing the
system to switch to No License mode.
The minimum number of port networks that require an IPSI is determined by the following
formulas:
- Duplex (Direct Connect): 1 IPSI controls up to 3 PNs. If 1 or 2 PNs and if a G650 media
gateway PN is added, it may have an IPSI too. If 2 IPSIs are used, the IP control for 1 is
yes and the other is no.
- Duplex (Center Stage or ATM): Total Number of PNs divided by 5 (if not an integer, round
up), plus one.
- High/Critical: Total Number of PNs divided by 5 (if not an integer, round up). For each
IPSI-connected PN, you need 2 IPSIs.
Guidelines:
On large configurations that contain multiple switch node carriers, IPSIs should be placed
as evenly as possible among the switch nodes. Use the list fiber all command to
determine which port networks are connected to which switch node.

Standard (simplex) reliability configuration

To set up a standard configuration:
!
WARNING:
The following procedure affects service when the circuit packs are being
WARNING:
switched out. Coordinate this activity with the customer to minimize disruption of
customer activities.
Note:
You can replace the maintenance circuit pack with the TN775D Maintenance
Note:
(EPN) (if necessary) and the TN2182 Tone Clock circuit packs with the
TN2312BP Internet Protocol Server Interface (IPSI-2) circuit packs and program
them ahead of time. All the circuit packs being replaced are hot-swappable, so
you do not need to power down the PNs or the carrier.
Upgrading and administering the existing hardware
Issue 4 January 2005 65