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How to force multicast packet to go via different interface?

 
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Operating Systems Solaris How to force multicast packet to go via different interface?
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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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LEARN ABOUT OPENSOLARIS

network-admin

network-admin(1)						   User Commands						  network-admin(1)

NAME

       network-admin - Basic administration of network interfaces.

SYNOPSIS

       network-admin [--configure=INTERFACE] [--configure-type=TYPE] [gnome-std-options]

DESCRIPTION

       network-admin  enumerates  the  interfaces  available to the user and provides a mechanism for configuring these interfaces as static-IP or
       DHCP. It's also possible to select which interfaces should be enabled on boot.

       network-admin also allows you configure the systems hostname, DNS options and hosts using the user interface.

OPTIONS

       The following options are supported:

       -c, --configure=INTERFACE       Configure a specific network interface (e.g. ath0 or bge0).

       -t, --configure-type=TYPE       Configure the first network interface of a specific type (e.g. ethernet or wireless).

       gnome-std-options	       Standard options available for use with most GNOME applications. See gnome-std-options(5) for more informa-
				       tion.

EXAMPLES

       Example 1: Running the main application.

       example% network-admin

       Example 2: Configuring the ath0 network interface.

       example% network-admin --configure=ath0

       Example 3: Configuring the first ethernet interface.

       example% network-admin --configure-type=ethernet

EXIT STATUS

       The following exit values are returned:

       0	Application exited successfully

       >0	Application exited with failure

FILES

       The following files are used by this application:

       /usr/bin/network-admin	       Executable for network interface configuration.

       /etc/inet/gnome-system-tools    Storage location for network configuration files when not active on boot.

       /var/spool/setup-tool-backends/backup/network
				       Backup directory for files that are modified.

       /var/spool/setup-tool-backends/data/network
				       Where "Location" profiles are stored.

       /var/run/setup-tool-backends/debug/network
				       Debug logs can be found under here.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-system-tools	   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Uncommitted		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       Latest version of the GNOME Desktop User Guide for your platform.

       users-admin(1),	 shares-admin(1),   services-admin(1),	time-admin(1),	gnome-std-options(5),  ifconfig(1M),  hosts(4),  nsswitch.conf(4),
       resolv.conf(4), attributes(5)

NOTES

       This tool can only be used to manage physical network devices as returned by the "dladm show-dev" command, it does not  support	configura-
       tion of more complex configurations.

       There  is  currently  no  support  for enterprise name services such as YP/NIS, NIS+ or LDAP. There is also no support for anything but the
       global zone.

       Written by Darren Kenny, Sun Microsystems Inc., 2006.

SunOS 5.11							    6 Nov 2006							  network-admin(1)