Lan Redundancy; Configuration Requirements; Signaling And Media Redundancy - Polycom RealPresence 800s Administrator's Manual

LAN Redundancy

LAN Redundancy enables the redundant LAN port connection to automatically replace the
failed port by using another physical connection and NIC (Network Interface Card). When a
LAN port fails, IP network traffic failure is averted and network or endpoints
disconnections do not occur. When LAN cables are connected to both LAN 2 and LAN 3
ports, the Collaboration Server automatically selects which port is active and which is
redundant.

Configuration Requirements

LAN Redundancy is available by default and is enabled by connecting the additional LAN
cable to LAN 3, or LAN 4.

Signaling and Media Redundancy

On the Collaboration Server LAN2 is used for media and signaling and LAN 3, and LAN 4 are
the redundant media ports:
Figure 16-1
Media Redundancy on the Collaboration Server is dependent on the settings of the
LAN_REDUNDANCY and MULTIPLE_SERVICES System Flags as summarized in
Table 1-1
Table 16-20
System Flag / Value
LAN_REDUNDANCY
MULTIPLE_SERVICES = NO
LAN_REDUNDANCY
MULTIPLE_SERVICES = YES
LAN_REDUNDANCY
MULTIPLE_SERVICES = NO
Polycom, Inc.
LAN 1
LAN 2
Collaboration Server - Rear View
Collaboration Server - Media Redundancy - System Flags
= NO
= NO
= YES
LAN 3
LAN 4
Collaboration Server
No redundancy
Full signaling and media redundancy
Chapter 16-IP Network Services
16-31