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Reliability and Recovery
268 Avaya Application Solutions IP Telephony Deployment Guide
Figure 78: Release 3.0 system example
S8700-series Server Separation
S8700-series server separation allows the two servers in an S8700-series Server pair to be
geographically separated up to a maximum distance of 10 kilometers over a fiber-optic link.
Separating the servers offers an improved survivability option by allowing servers to reside in
two different buildings across a campus or small Metropolitan Area Network. This feature
capability is applicable to the S8700-series Servers in both fiber-PNC and IP-PNC
configurations.
The sever separation feature works best when each server is accompanied by its own Layer 2
Ethernet switch. For example, in a fiber-PNC system, each server would have an Ethernet
switch co-located with it. The two Ethernet switches would be connected using a 100base-FX or
Gigabit Ethernet link. For optimum results, the port networks should also be distributed with
respect to Ethernet switches.
Note:
Note: S8700-series Server Separation does not provide for separation of duplicated
center stage switch port network connectivity (CSS-PNC) in a critical reliability
configuration.