Cisco Headend System Release 2.7 Installation Guide
Chapter 1 Introducing GQAM Software Version 4.2.1
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CR 93019: GQAM SMDG With Only Six SD Programs Causes the Set-Top to
Display Intermittent Screen Freezing
In GQAM software version 4.2.1 and earlier, if an incoming MPTS has 10 to 12
programs and only six of these programs have GQAM sessions built on a stat mux
dejitter group (SMDG), the resulting output streams may have intermittent video
freezing. To prevent this condition, only remove sessions from the GQAM once the
programs have been removed from the incoming MPTS.
CR 94293: Incorrect Default Value for Dual Port Switch Timing
In GQAM software version 4.2.1, an invalid timing parameter stored in non-volatile
memory may lead to the GQAM incorrectly reporting a successful port switch when
no content is present at either GQAM input. This condition has no operational
impact. There is a workaround to correct this value.
Workaround
From either a GQAM telnet connection or the GQAM craft port, type this command:
gigadual w 1 0 100 3
This command only has to be entered once for the life of the GQAM.
From either a GQAM telnet connection or the GQAM craft port, type this command:
gigadual w 1 0 100 3
This command only has to be entered once for the life of the GQAM.
CR 95751: GQAM Failure to Respond to IGMPv2 Query Causes Intermittent
Momentary Loss of All Multicast Content
In GQAM software version 4.2.1 and earlier, the GQAM may fail to respond to two
consecutive IGMPv2 general queries. When this occurs, all IGMPv2 multicast
content is temporarily cut off at the switch causing all IGMPv2 video content to drop
for approximately 30 to 45 seconds. This occurrence rate is random, but may happen
one to three times a month. The only workaround is to use an IGMPv3 multicast
network.