Avaya ESS User Manual

ESS Overview
40 Avaya Enterprise Survivable Servers (ESS) Users Guide
There is a catastrophic failure that occurs on the S8710 Main server (see Figure 12). The Port
Networks can no longer communicate with the Main server. The IPSIs in Port Networks 1, 3, 4,
and 5, request service from the S8500 ESS server after the no service timer expires. ESS does
not utilize CSS, therefore Port Network 2 and the CCS located in Port Network 3 is
out-of-service.
Figure 12: CSS after failover with single ESS server
LAN (IP PNC)
CSS
UID
2
1
0
1
1
0
3
2
3
2
disc
COMPACT
5
4
5
4
S
i
m
p
l
e
x
D
u
p
l
e
x
ch
ch
2
1
UID
2
1
0
1
1
0
3
2
3
2
disc
COMPACT
5
4
5
4
S
i
m
p
l
e
x
D
u
p
l
e
x
ch
ch
2
1
S8710 Media Server
(Main Server)
PN #1
PN #2
PN #3
cycmcss2 KLC 031505
disc
S8500 ESS Server
(1st Alternative)
PN #4
PN #5
IP Media Processors
assume PNC
Out of Service
CSS / EI (Fiber)
ATM / ATM-EI (Fiber)
Dup Link
Port Network Control Link (EAL)
IP Connection into Control Network
Server or Network Failure
VoIP Path
DSIC LInk

Avaya ESS Specifications

General

Brand	Avaya
Model	ESS
Category	Server
Language	English