update multicast client troubleshooting and example documentation for reverse path

**Is your feature request related to a problem? Please describe.**
update multicast client troubleshooting and example documentation
* reverse path
* vlan removal pcap

linux kernel:
Check reverse path filter:
`sudo sysctl -a | grep "\.rp_filter"`

Set filter for all interfaces
`sysctl -w net.ipv4.conf.all.rp_filter=0`

**Describe the solution you'd like**
see above

**Describe alternatives you've considered**
n/a

**Additional context**
see above