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Operating Systems Solaris How to force multicast packet to go via different interface? Post 303044535 by solaris_1977 on Tuesday 25th of February 2020 01:15:10 PM
Old 02-25-2020
I found the issue, it was tricky.

Multicast packets are going through admin interface because it is managed by /lib/svc/method/net-svc configuration. One of its parameter says
Code:
if [ "$_INIT_NET_STRATEGY" = "dhcp" ]; then 
        mcastif=`/sbin/dhcpinfo Yiaddr` || mcastif=$_INIT_UTS_NODENAME 
else 
        mcastif=$_INIT_UTS_NODENAME 
fi

It says multicast should go via NODENAME. That means, whatever is hostname and uname -n returns. By default hostname is set to admin interface. Two changes I made :

-Changed hostname and zonename in /etc/hosts, so at zonemanager level, it look to pubic IP
-In zonecfg, I moved up the public interface, so it goes FIRST in zone description file.
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ATALKD(8)							   Netatalk 2.2 							 ATALKD(8)

NAME
atalkd - AppleTalk RTMP, NBP, ZIP, and AEP manager SYNOPSIS
atalkd [-f configfile] [-1] [-2] DESCRIPTION
atalkd is responsible for all user level AppleTalk network management. This includes routing, name registration and lookup, zone lookup, and the AppleTalk Echo Protocol (similar to ping(8)). atalkd is typically started at boot time, out of /etc/rc. It first reads from its configuration file, /etc/netatalk/atalkd.conf. If there is no configuration file, atalkd will attempt to configure all available interfaces and will create a configuration file. The file consists of a series of interfaces, one per line. Lines with `#' in the first column are ignored, as are blank lines. The syntax is interface [ -seed ] [ -phase number ] [ -net net-range ] [ -addr address ] [ -zone zonename ] ... Note that all fields except the interface are optional. The loopback interface is configured automatically. If -seed is specified, all other fields must be present. Also, atalkd will exit during bootstrapping, if a router disagrees with its seed information. If -seed is not given, all other information may be overriden during auto-configuration. If no -phase option is given, the default phase as given on the command line is used (the default is 2). If -addr is given and -net is not, a net-range of one is assumed. The first -zone directive for each interface is the ``default'' zone. Under Phase 1, there is only one zone. Under Phase 2, all routers on the network are configured with the default zone and must agree. atalkd maps ``*'' to the default zone of the first interface. Note: The default zone for a machine is determined by the configuration of the local routers; to appear in a non-default zone, each service, e.g. afpd, must individually specify the desired zone. See also nbp_name(3). ROUTING
If you are connecting a netatalk router to an existing AppleTalk internet, you should first contact your local network administrators to obtain appropriate network addresses. atalkd can provide routing between interfaces by configuring multiple interfaces. Each interface must be assigned a unique net-range between 1 and 65279 (0 and 65535 are illegal, and addresses between 65280 and 65534 are reserved for startup). It is best to choose the smallest useful net-range, i.e. if you have three machines on an Ethernet, don't chose a net-range of 1000-2000. Each net-range may have an arbitrary list of zones associated with it. EXAMPLES
Below is an example configuration file for a sun4/40. The machine has two interfaces, ``le0'' and ``le1''. The ``le0'' interface is configured automatically from other routers on the network. The machine is the only router for the ``le1'' interface. le0 le1 -seed -net 9461-9471 -zone netatalk -zone Argus atalkd automatically acts as a router if there is more than one interface. FILES
/etc/netatalk/atalkd.conf configuration file BUGS
On some systems, atalkd can not be restarted. SEE ALSO
atalkd.conf(5) Netatalk 2.2 06 Sep 2004 ATALKD(8)
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