07-25-2013
Hi, I am working on this issue as well with SavLou,
Iptables and ip6tables are usually used on Busybox for firewall rules, but they are not even installed / running on the hosts.
So no, no firewall logs…
The ICMPv6 NDP "neighbor solicitation" (type 135) is properly sent from host A as monitored on host C, but device B never gets any packet. All are connected on an IPv6 capable switch.
It is as if device B does not receive IPv6 multicast packets.
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LEARN ABOUT DEBIAN
mcfirst
mcfirst(1) General Commands Manual mcfirst(1)
NAME
mcfirst - check if you can receive IPv4/IPv6 multicast
SYNOPSIS
mcfirst [ -46vr ] [ -I interface ] [ -c count ] [ -t time ] [ source ] group port
DESCRIPTION
mcfirst can be used to check whether one can receive multicast packets from a host. The host may send any type of multicast packets, any
application, IPv4 or IPv6, ASM or SSM. mcfirst joins the specified (source) and group, and listens to the specified port. mcfirst will by
default exit when the first packet is received, and print how long it waited.
OPTIONS
The options are as follows.
-4 Force IPv4
-6 Force IPv6
-v Print version
-r Print rate information only
-I interface
Interface to join on
-c count
Stop after receiving count packets. Default is 1 unless time limit is specified
-t time
Exit after time seconds. Default is to exit after the first packet. If both count and time are specified, mcfirst will exit as soon
as one of them is satisfied.
SEE ALSO
ssmping(1) a tool for checking whether can receive SSM.
dbeacon(1) a distributed beacon multicast implementation.
BUGS
Please report them to Stig Venaas <venaas@uninett.no>, the author of this tool.
HISTORY
mcfirst was developed by Stig Venaas during the early days of the m6bone, the IPv6 multicast backbone.
User Manuals mcfirst(1)