PKT-INT (Packet Interface)
Issue 1 May 2002
8-1245555-233-143
High-Reliability Configuration
The high-reliability configuration shown in Figure 8-75 has duplicated media
servers, duplicated control networks, and duplicated IPSIs in the IPSI-connected
EPNs. With this configuration, every IPSI-connected EPN must have duplicated
IPSIs. The duplicated control network prevents a single fault in the control
network, such as a bad Ethernet switch, from bringing the whole system down.
Since the IPSI’s are duplicated in this configuration, the PKT-INT circuits are also
duplicated.
Figure 8-75. High-Reliability Configuration
EI
EPN 3
Server A Server B
IPSI IPSI
EI
EPN 2
IPSI IPSI
EI
EPN 1
Control Network A Control Network B
Bearer Network
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