Clarification on Launching snmpd with arguments.

Hi ,

I am using Netsnmp 5.4.2.1 in my linux box and had some issues in launching
snmpd, but finally it got resolved by changing the way of passing parameter
to snmpd process.

I had Netsnmp 5.3.x version earlier, and the way I was launching snmpd was:
snmpd -c snmpd.conf udp:161,udp6:161 -x localhost:161

after I launch this, I could see the following ports open:
udp    on *.161
udp6  on *.161
tcp     on localhost:161  ( Master Agentx LISTENING on TCP:161 port) and the
sub agents could connect to Master agent on TCP port 161.

If I try the same way of launching snmpd in 5.4.2.1, then  I was getting the
error "Unable to open specified endpoint """, later I added space between
udp:161 and upd6:161 instead of comma while launching snmpd i.e
snmpd -c snmpd.conf udp:161 udp6:161 -x localhost:161

after I launch this, I could see the following ports open:
 udp    on *.161
udp6  on *.161
Agentx on unix domain socket instead of TCP.

Later I passed tcp:localhost:161 to snmpd instead of just localhost:161, i.e
snmpd -c snmpd.conf udp:161 udp6:161 -x tcp:localhost:161

with this I could see the following ports open,
udp    on *.161udp6  on *.161
tcp     on localhost:161  ( Master Agentx LISTENING on TCP:161 port) and the
sub agents could connect to Master agent on TCP port 161.

I need a clarification in the way snmpd is launched in 5.4.2.1, I went
through FAQ there I could see if we don't specify localhost then it binds to
unix domain socket, in 5.4.2.1 even after specifying localhost:161, the
Master Agentx binds to Unix domain socket!
Could you clarify on this?

Lastly(not of great importance), do we have a definite way of specifying
more than one listening address to snmpd? How the list is separated( either
with commas or with spaces), in the man pages of snmpd I didn't see how the
list of listening addresses are separated?

Thanks,
Harish

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