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====== Force IGMP version on EL and Mux ======
<color #db5f0b>Apr 2024</color>
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When using IGMP sometimes we want to force the IGMP version, normally to match the version used on the data switches to unsure a cleaner operation during reboots, redundancy switches etc.
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The commands to do this differ between the Gx servers used for Encoding Live and the M1 servers used for Multiplexing.
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==== Gx Servers ====
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At the time of writing, I have only tested this on the G8, not on the newer G9 as yet.
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This section below will change IGMP V3 to IGMP V2.
<file>
test -f /opt/ericsson/tuned-performance/etc/tuned.conf && sed -i -e "s|\(net\.ipv4\.conf\.[^.]*\.force_igmp_version = \)3|\12|" /opt/ericsson/tuned-performance/etc/tuned.conf
test -f /opt/ericsson/tuned-performance/etc/ktune.sh && sed -i -e "s|do echo 3|do echo 2|" /opt/ericsson/tuned-performance/etc/ktune.sh
sysctl --system
systemctl restart tuned
sysctl -a|grep force_igmp
</file>
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==== M1 Servers ====
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This section of code will change the IGMP version on an M1 based Multiplexer from IGMP V3 to IGMP V2.
<file>
test -f /etc/tuned/custom/tuned.conf && sed -i -e "s|\(net\.ipv4\.conf\.[^.]*\.force_igmp_version = \)3|\12|" /etc/tuned/custom/tuned.conf
test -f /etc/tuned/custom/ktuned.sh && sed -i -e "s|do echo 3|do echo 2|" /etc/tuned/custom/ktuned.sh
sysctl --system
systemctl restart tuned
sysctl -a|grep force_igmp
</file>
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