Cisco Headend System Release 2.7 Guía De Instalación
Chapter 1 Introducing GQAM Software Version 4.2.1
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Support for SNMP Traps
All prior releases of GQAM software have only supported SNMP queries. With the
All prior releases of GQAM software have only supported SNMP queries. With the
addition of SNMP trap support, the GQAM can now be configured to autonomously
announce internal alarms to an external SNMP trap server. The GQAM trap server is
defined using an environmental variable in the gqam.config file called
TrapServerIpAddr. By default, this variable is set to the internal loopback address
127.0.0.1. In order to specify a trap server, the configuration file specified for the
GQAM should by modified to set TrapServIpAddr to the appropriate IP address.
Note: The GQAM must be rebooted before this modification takes effect.
Note: The GQAM must be rebooted before this modification takes effect.
Support for IGMP Anycast
Similar to multicast, anycast is a one-to-many routing topology. Previous releases of
Similar to multicast, anycast is a one-to-many routing topology. Previous releases of
GQAM software only supported strict implementations of Internet Group
Management Protocol (IGMP) v3 and required the transmission source IP address be
specified in session-specific parameters. With the addition of “Anycast support,” the
transmission source IP address is now an optional parameter and can be omitted in
networks designed for the anycast routing topology. Specifically, this feature allows
multicast groups to be defined on the GQAM in an IGMP network where sources are
not known or not duplicated.
Support for Virtual IP Addresses
Virtual IP address support, also known as VOD redundancy, allows both physical
Virtual IP address support, also known as VOD redundancy, allows both physical
input ports on the dual-port GQAM to share a common IP address. With the
addition of this feature, each input Gigabit Ethernet (GigE) port maintains a separate
physical IP address and a third VOD redundancy IP address is shared between
them. The VOD redundancy IP address is used to specify the destination IP address
for VOD services.
The GQAM VOD redundancy IP address can be configured on a dual-port GQAM
The GQAM VOD redundancy IP address can be configured on a dual-port GQAM
via the DNCS in the Gigabit Ethernet Ports section of the Set Up GQAM window on
the Basic Parameters tab.
With the addition of this feature, dual-port GQAMs can now support both broadcast
With the addition of this feature, dual-port GQAMs can now support both broadcast
services and VOD simultaneously while using redundant GigE feeds.
Important: SR 4.3 is required to configure this feature on the GQAM.
Important: SR 4.3 is required to configure this feature on the GQAM.