SUN snmpdx SNMP Agent

Hello *,
In our project I want to use SUN (Solaris 9 and 10) SNMP Agent to send hardware failure traps.
As I know, besides other things, I have to edit snmpdx.acl file using following example.
snmpdx.acl:
# trap parameters
trap =
trap-community = public
hosts = atpcundx
enterprise = "sun"
trap-num = 0, 1, 2-5, 6-16
Problem that I have is that I cannot find explanations for meaning for parameter "enterprise" and "trap-num".
Does anyone have an idea where I can find descriptions what enterprise = "sun" or "snmp" or "3com" or "Solaris Volume Manager" means and what is the meaning of trap numbers integer values.
I tried to test configuration as it is described in SUN documentation. I have strange results. Traps are not sent until in snmpd.conf "trap = <hostname>" is set.
Entries from snmpd.acl file are ignored even in this case.
Generally, does anyone knows how to configure this feature to work.
Any help will be appreciated.
Thanks in advance.
Brgds
SF

Dear folks,
Does the Sun JES server have a separate SNMP sun
agent?Indeed:
http://docs.sun.com/app/docs/doc/819-2650/6n4u4dtvq?q=snmp&a=view
>
I want to run the Solaris SNMP agent (snmpdx) as
master agent with the Sun JES sub-agent. Is it
possible?I don't know why not. Start by looking at the documentation.
>
Thanks in advance.
T Dang

Similar Messages

Re: Wls agent as subagent to Sun's Snmp Master Agent

I have successfully configured the WL SNMP agent as subagent to
Sun's (Solaris 7 in my case) master SNMP agent.
Sun's Solstice Enterprise Agent documentation under docs.sun.com
is a bit confusing but serves as a reference if not a step-by-step guide.
Here are the general steps that I took:
1) Modify the shipped startSNMPAgent.sh for your system password
and community (I wouldn't use "public"!).
Add some if-then-fi code to check for the $1 command line parameter,
so Sun's master agent can pass in the dynamically allocated port number
that the agent will listen to. I also changed the ownership of this
script so only root can see it, as it contains the WL admin password.
2) Go to the /etc/snmp/conf directory (default Solaris 7 install).
Create the files weblogic.rsrc and weblogic.reg using the mibiisa.*
files as templates.
3) In the weblogic.reg file, add the lines
"macros = { bea = enterprise.140 }" before the "agents" line.
This defines the weblogic agent's starting OID point.
Then, change the subtree line to "bea".
4) In the .rsrc file, change the command used to spawn the
agent to "/weblogic/startSNMPAgent.sh $PORT".
Be aware that this spawn command is visible through Sun's master
agent MIB, so don't put anything sensitive in there (like a
community name or password).
5) Finally, there is a timing condition that you should be aware of.
WebLogic's SNMP agent will only bind to an active WL server.
Sun's master agent will only bind to an active subagent.
Therefore, you should ensure that
WebLogic server is started first (and the server comes completely
up), then Sun's master agent is started. I setup my /etc/rc3.d
startup files to run weblogic before snmpdx. I had to insert a
sleep command to make sure that WL was completely up before
snmpdx was run. This is because my startup script runs java in
the background, so if you don't sleep then WL won't be up before
snmpdx spawns the subagent and tries to bind to it.
Finally, Sun's mib files can be found under /var/snmp/mib.
Easier to find than NT's mib files!
Hope that helps -
Tom
"Sanjeev Chopra" <[email protected]> wrote:
>
Robert Prakash <[email protected]> wrote in message
news:[email protected]...
Hi Sanjeev
My Wls agent is working fine as Master agent with Sun's Snmpdx as subagentto it.
There is no problem with that.
But can I make WLS agent, subagent to Sun's Snmp Agent.For that I needWls
SubAgent resource
files to be included in the configuration directory of Sun's Snmp Agent.The last time i checked, Sun's master agent is more "loosely coupled"
with
other agents it needs to co-ordinate with. I haven't tried it, however
i
beleive it should work. Because the master agent doesn't rely on built-in
protocol for interaction with other agents. (much like -otherAgents option
in the wls agent).
You just need to specify in SUN's syntax (resource files...) where the
wls
agent is running, what is its community, which MIBs it supports , what
should be the timeout and such ...
Good Luck!
If you run into any problem let me know.
Is this possible in the first place and if so how do I do it. I sawyour
response on the same issue for
Windows NT. I am mailing to find out if its different on Solaris(orUnix).
Thanks
Robert

Hello:
I created exactly as you specified. I.e weblogic.reg, weblogic.rsrc, weblogic.acl. But the issue I have is My weblogic snmp agent is listening on port 8061. Snmp demon on 161. So when I request the Snmp demon with OID of weblogic object. I am not getting the result also call is not reaching weblogic agent. Instead I am getting no such name or OID. So I am wondering why snmp demon is not forwarding the request to snmp demon.
Also Could you please explain the execution sequence of snmp demon and where you think I need to look at. Also please explain the constructs used in reg/acl/rsrc files.
Note:
I am using wls 6.1 sp2. So just my starting admin server. The enabled snmp gets started. Also I configured snmp demon so that when ever it gets started the weblogic server also starts. Also there is no issue in receiving traps.
Thanks in Advance.
Vijay

Wls agent as subagent to Sun's Snmp Master Agent

Hi Sanjeev
My Wls agent is working fine as Master agent with Sun's Snmpdx as subagent to it.
There is no problem with that.
But can I make WLS agent, subagent to Sun's Snmp Agent.For that I need Wls SubAgent resource
files to be included in the configuration directory of Sun's Snmp Agent.
Is this possible in the first place and if so how do I do it. I saw your response on the same issue for
Windows NT. I am mailing to find out if its different on Solaris(or Unix).
Thanks
Robert

Robert Prakash <[email protected]> wrote in message
news:3a002079$[email protected]..
>
Hi Sanjeev
My Wls agent is working fine as Master agent with Sun's Snmpdx as subagentto it.
There is no problem with that.
But can I make WLS agent, subagent to Sun's Snmp Agent.For that I need WlsSubAgent resource
files to be included in the configuration directory of Sun's Snmp Agent.The last time i checked, Sun's master agent is more "loosely coupled" with
other agents it needs to co-ordinate with. I haven't tried it, however i
beleive it should work. Because the master agent doesn't rely on built-in
protocol for interaction with other agents. (much like -otherAgents option
in the wls agent).
You just need to specify in SUN's syntax (resource files...) where the wls
agent is running, what is its community, which MIBs it supports , what
should be the timeout and such ...
Good Luck!
If you run into any problem let me know.
>
Is this possible in the first place and if so how do I do it. I saw yourresponse on the same issue for
Windows NT. I am mailing to find out if its different on Solaris(or Unix).
Thanks
Robert

Solaris 10 SNMP Agent

Hi everybody,
I need to find a how to manual about the setup of SNMP Agent (with MIBs) everything and then i want to integrade with an NMS tool.
Thnx

[http://docs.sun.com/app/docs/doc/817-3000/]

SNMP Agent for Solaris

We're looking for a direction regarding an SNMP agent for our Solaris Platforms. The standard agent bundled with Solaris seems to have many issues and CERT outstanding advisories. I'm wondering what others out there are running, Net-SNMP?, the ESD agent bundled with Sun Management Center?, others? I've looked at the ESD agent and it looks as though this would provide Temps, Fan Speeds, etc... for our servers but it seems as though it's lacking things like 1/5/15 minute load averages, CPU/Disk utilization etc...
Any experiences are welcome!
-Steve Eastham
[email protected]

hi,
The same problem with me too. Im using Net-SNMP, but may be one cant trust its reliability and even if we use Net-SNMP loading of PERL scripts/modules is difficult in solaris.
If you got /gathered any useful information please let me too know.
regards
Chenna

How to use SNMP Agent

Hi All,
Can anybody tell me how to use SNMP Agent to monitor the Access and Identity Servers

Hi Ramesh,
I cannot comment on WebLogic & SNMP - this kind of questions would
probably need to be asked on a WebLogic forum.
If you're looking for an SNMP Manager API though, you may want to have a
look at the Java Dynamic Management Kit (commercial product,
free evaluation):
http://java.sun.com/products/jdmk/index.jsp
Hope this helps,
-- daniel
JMX, SNMP, Java, etc...
http://blogs.sun.com/jmxetc
null

WebLogic Server 9.1 and SNMP Agent enabled

Hello everybody,
I have enabled the WebLogic 9.1 SNMP agent but it isn't quite working right.
The Sun Management Center software tells me that the WebLogic SNMP Agent (loaded with Halcyon PrimeAlert BEA WebLogic module) is not responding for any of the Application servers (there are only 2) however it does correctly work when the PrimeAlert BEA WebLogic module is configured for the Administrative Server and the entire WebLogic domain.
The community strings that are working (domain & administrative server):
public@mydomain
public@myapplicationserver
Those that don't work (application servers):
public@myappserverone
public@myappservertwo
Oddly enough, originally when I configured these I changed the WebLogic SNMP Agent community prefix to 'mycommunity' and turned the WebLogic SNMP Agent debugging up to 3 but it didn't work. So I changed the community string back to the default 'public', leaving the debugging level at 3 (restarting WebLogic of course) and then it worked.
...so 3 days later I decided to turn the debug level back to the default of 1, leaving the community prefix as public and then restarted WebLogic: then the SNMP Agent for the application servers no longer worked again!!! So I changed it back to 3 and it still no longer worked!!! Help!!!
Can any one help please?
Edited by: user5598330 on Sep 30, 2008 1:35 PM

The problem lies in the slow response time of WebLogic, especially on start up, combined with the 3rd party SNMP product which never queries again after the initial time out.
Ain't the potability of Java great?

5.1 SNMP Agent doesn't respond in pressure situations.

Weblogic SNMP Agent Stoped Responding.
When I abuse the Weblogic 5.1 Server with a heavy load (Heavry load meaning
a high URL Connections that access Session and Entity Beans) and ping my
server cpu utilization at over 92%, the Weblogic SNMP Agent stops
responding.
Has anyone else seen this happen?
- I Assume it is because the remote Virtual Machine Connection has lower
priority than the Executon Threads in reporting Status.
I am onn a Solaris 2.7 Platform using Weblogic 5.1 sp6 or sp8, unsing Sun
Java JDK 1.2.006
I have tried to nice the PID, but it seams to have no effect..
I need a better soution
Tony McClay
Seven Space.com
(708) 466-8205

Surely someone else knows what I'm talking about? Isn't the whole point of the Favorites Bar that you can put any Mailbox or Smart Mailbox in it, for easy access?

Java Exception when attempt to start the SNMP agent

Hi,
I require to start the SNMP agent in Solaris 2.6 running Web Logic 5.1. Upon entering
the command :
$ java weblogic.SNMPAgent, it is asking me for the password , and I gave the same.
The system is
generating a Java Exception given below:
Exception in thread "main" com.adventnet.snmp.snmp2.agent.AgentRuntimeException:
Failure in opening SnmpSession, errstat: 0, errvalue: 0
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Compiled Code)
at java.lang.Throwable.<init>(Compiled Code)
at java.lang.Exception.<init>(Compiled Code)
at java.lang.RuntimeException.<init>(RuntimeException.java:47)
at com.adventnet.snmp.snmp2.agent.AgentRuntimeException.<init>(AgentRuntimeException.java:63)
at com.adventnet.snmp.snmp2.agent.SnmpAgent.addClientAndOpenSession(SnmpAgent.java:801)
at com.adventnet.snmp.snmp2.agent.SnmpAgent.restartSnmpAgent(SnmpAgent.java:939)
at com.adventnet.snmp.snmp2.agent.SnmpAgent.restartSnmpAgent(CompiledCode)
at com.adventnet.snmp.snmp2.agent.SnmpAgent.setPort(Compiled Code)
at weblogic.management.snmp.agent.WebLogicAgent.init(Compiled Code)
at weblogic.management.snmp.agent.WebLogicAgent.startup(WebLogicAgent.java:377)
at weblogic.SNMPAgent.main(SNMPAgent.java:25)
Given below is the file <startSNMPAgent.sh> and it's central contents:
$JAVA weblogic.SNMPAgent -password pbgst -serverURLs t3://localhost:7001 -trap
Destinations localhost:162
The classpath settings are correct and as per documentation.
There are SNMP agents also running in the machine which have been started by default
by Solaris,
doing a ps -ef | grep snmp shows:
root 556 1 0 Jun 23 ? 0:00 /usr/lib/dmi/snmpXdmid -s sunhyd01
root 516 1 0 Jun 23 ? 0:00 /usr/lib/snmp/snmpdx -y -c /etc/snmp/conf
pbgst 28090 25879 0 17:01:37 pts/32 0:00 grep snmp
I tried to start the SNMP agent on a diff. port and specified the same in the
.sh file and also changed the
trap Destinations port ---- it still generates the same exception.
Please do try to resolve this problem for me, as the project is in production
phase.
Thanks for all help beforehand.
Baivab
P.S. How can I obtain the id for WebSupport center, as we have using WL licensed
product
recently purchased in 3 nos.

Hello,
way back we had the same problem and the reason was, that the path
names with the server instances were to long
(/opt/wlsroot/wlsInstances/axsExpert.SwissAir/S_243_7001 ->
/opt/wlsroot/wlsInstances/axsExpert.SAir/S_243_7001). But this was
with WLS 5.1 SP8.
Regards
Wolfgang Becker
Atraxis
On 9 Jul 2001 23:02:29 -0800, "Baivab Mitra"
<[email protected]> wrote:
>
Hello Michel,
Thanks for the reply. As you may have noticed, that the SNMP agents which are
already running, the owner is <root>. These services are required and I do not
have or I can not obtain the password to start/stop the same. As such, the only
option which I have is to start the weblogic-specific SNMP service in a different
port. Question: In the parameters, I specified : <snmpPort 1600 trace Destinations
1601> I am still getting the same error. What else is required and/or how do I
proceed to start the same service?
Thanks for your help beforehand,
Baivab
"Michael Girdley" <----> wrote:
It looks like another SNMP agent has already bound to the port.
Michael Girdley
BEA Systems
Learning WebLogic? http://learnweblogic.com
"Baivab Mitra" <[email protected]> wrote in message
news:[email protected]...
Hi,
I require to start the SNMP agent in Solaris 2.6 running Web Logic5.1.
Upon entering
the command :
$ java weblogic.SNMPAgent, it is asking me for the password , and Igave
the same.
The system is
generating a Java Exception given below:
Exception in thread "main"com.adventnet.snmp.snmp2.agent.AgentRuntimeException:
Failure in opening SnmpSession, errstat: 0, errvalue: 0
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Compiled Code)
at java.lang.Throwable.<init>(Compiled Code)
at java.lang.Exception.<init>(Compiled Code)
at java.lang.RuntimeException.<init>(RuntimeException.java:47)
atcom.adventnet.snmp.snmp2.agent.AgentRuntimeException.<init>(AgentRuntimeExce
ption.java:63)
atcom.adventnet.snmp.snmp2.agent.SnmpAgent.addClientAndOpenSession(SnmpAgent.j
ava:801)
atcom.adventnet.snmp.snmp2.agent.SnmpAgent.restartSnmpAgent(SnmpAgent.java:939
atcom.adventnet.snmp.snmp2.agent.SnmpAgent.restartSnmpAgent(CompiledCode)
at com.adventnet.snmp.snmp2.agent.SnmpAgent.setPort(CompiledCode)
at weblogic.management.snmp.agent.WebLogicAgent.init(CompiledCode)
atweblogic.management.snmp.agent.WebLogicAgent.startup(WebLogicAgent.java:377)
at weblogic.SNMPAgent.main(SNMPAgent.java:25)
Given below is the file <startSNMPAgent.sh> and it's central contents:
$JAVA weblogic.SNMPAgent -password pbgst -serverURLst3://localhost:7001 -trap
Destinations localhost:162
The classpath settings are correct and as per documentation.
There are SNMP agents also running in the machine which have been startedby default
by Solaris,
doing a ps -ef | grep snmp shows:
root 556 1 0 Jun 23 ? 0:00 /usr/lib/dmi/snmpXdmid-s
sunhyd01
root 516 1 0 Jun 23 ? 0:00 /usr/lib/snmp/snmpdx -y-c
/etc/snmp/conf
pbgst 28090 25879 0 17:01:37 pts/32 0:00 grep snmp
I tried to start the SNMP agent on a diff. port and specified the samein
the
sh file and also changed the
trap Destinations port ---- it still generates the same exception.
Please do try to resolve this problem for me, as the project is inproduction
phase.
Thanks for all help beforehand.
Baivab
P.S. How can I obtain the id for WebSupport center, as we have usingWL
licensed
product
recently purchased in 3 nos.

Jdmk _ snmp agent acl

Hi,
I'm using jdmk snmp adaptor to develop an snmp agent. I've a problem in setting the agent accessControl List. In particular I've this accessListFile (jdmk.acl):
acl = {
communities = public
access = read-only
managers = <myIpAddress> }
and in my Agent, I set acl as follow:
SnmpAdaptorServer snmpAdaptor = null;
JdmkAcl theAcl = (JdmkAcl)(snmpAdaptor.getInetAddressAcl());
theAcl.setAuthorizedListFile("myAclPath"+jdmk.acl");
theAcl.rereadTheFile();
No Exception has been raised, but I can access my agent via snmp from various address and with a community different from "public". So It's seems that my acl file doesn't work properly
thank in advance
l

Hi,
You should use a constructor that takes an InetAddressAcl instead:
SnmpAdaptorServer(InetAddressAcl acl, int port);
Simply create the acl in this way:
String aclFileName = .... ;
InetAddressAcl acl = new JdmkAcl("myACL", aclFileName);
int port = ... ;
SnmpAdaptorServer server = new SnmpAdaptorServer(acl,port);
I believe this should work. The point here is that the adaptor has a mode where if you
don't specify any ACL, and the default ACL file doesn't exists, then it will let anybody
connect. If however, you do specify an ACL, then only those hosts/communities specified
in the ACL will be authorized - and if the file doesn't exists, nobody will.
Note: you can also ask any question regarding Java DMK on project OpenDMK user's list:
https://opendmk.dev.java.net/servlets/ProjectMailingListList
Hope this helps,
-- daniel
http://blogs.sun.com/jmxetc

How to configure SNMP agent for Oracle 10g

Hello,
I've installed oracle 10g in a Windows 2000 SP4 and I want to monitor database using SNMP.
I've already installed Windows SNMP agent but I haven't any idea how to configure Oracle in order to grant SNMP monitoring.
What should I do?
Is Oracle database ready to be monitored via SNMP by default?
Thanks in advance for your help.
Regards,
Carles

Hello,
Thanks for your message.
In fact, I already found this doc in oracle, but it just show executables I have to install and my question can I install these executables.
I've already installed Windows SNMP agent, configured and testedwith disk space checkings, but it doesn't work fine with Oracle.
I launched Oracle Universal Installer and I checked Installed Products, but I haven't found how to install SNMP agents for oracle.
How can I add Oracle Peer Master Agent and Encapsulator to my oracle installation?
Thanks again for your help.
Regards,
Carles

Weblogic SNMP Agent with WindowsNT SNMP Agent

Can I setup Weblogic SNMP agent as a sub-agent to Windows NT SNMP agent (Microsoft's version)? According to documentation, sub-agents for Microsft's SNMP agent need to be implemented as 32-bit multithreaded DLLs using the Microsoft SNMP API. Does Weblogic have DLLs that we could use for this purpose?
If that is not possible, is there a roadmap on how to provide the same support as the Microsoft's SNMP agent under Weblogic SNMP agent so that the Weblogic agent would provide the same visibility into the system that the Microsoft's agent does by default? Is this even possible?
Thanks.

"Sanjeev Mishra" <[email protected]> wrote:
>
Does anyone know how to make Microsoft's SNMP Master Agent run on a different port?
I figured this out. It uses the 'snmp' setting from the services file. Just changing that works. Would have been more convenient if there was also a command line flag for that purpose.
Thanks.
"Sanjeev Chopra" <[email protected]> wrote:
Sanjeev Mishra <[email protected]> wrote in message
news:39fde7f2$[email protected]..
Can I setup Weblogic SNMP agent as a sub-agent to Windows NT SNMP agent(Microsoft's version)? According to documentation, sub-agents for Microsft's
SNMP agent need to be implemented as 32-bit multithreaded DLLs using the
Microsoft SNMP API. Does Weblogic have DLLs that we could use for this
purpose?
No.
However, you can have the WLS agent proxy for the NT agent. e.g. you can run
the NT agent on a non-standard port and the WLS agent on 161 and then use
'-otherAgents' option so that the WLS agent will forward any reqs for the NT
agent MIB to that agent. In this setup the SNMP Manager can view that node
as one SNMP entity which supports the WLS MIB + NT MIB
See http://www.weblogic.com/docs51/admindocs/snmpagent.html#use_agent for
details.
If that is not possible, is there a roadmap on how to provide the samesupport as the Microsoft's SNMP agent under Weblogic SNMP agent so that the
Weblogic agent would provide the same visibility into the system that the
Microsoft's agent does by default? Is this even possible?
Thanks.

[Q] WLS SNMP Agent questions?

Hello, all
I am attaching the weblogic.properties, startWebLogic.cmd and
startSNMPAgent.cmd
I started the weblogic server 5.1 on port 7001.
Then started the SNMP agent using the command
"%JAVA% weblogic.SNMPAgent -password system -snmpPort 161 -serverURLs
t3://210.182.160.120:7001 -community public -debugLevel 3 -trapDestinations
210.182.160.111:162".
210.182.160.120 : WebLogic Server 5.1
210.182.160.111 : Trinity(NMS)
Then I tried to access the "serverState" variable using the command
"java snmpgetnext localhost .1.3.6.1.4.1.140.600.20.1.20"
"java snmpgetwalk localhost .1.3.6.1.4.1.140.600.20"
But i am getting the following error.
Response PDU received from localhost/127.0.0.1, community: public
Error in response. There is no such variable name in this MIB.
Index: 1
Errored Object ID: .1.3.6.1.4.1.140.600.40.1.10
How can I solve this problem?
Thanks in advance...
Have the pretty day. ^^;
[2.startSNMPAgent.JPG]
[3.snmp_command.JPG]
[4.SNMPAgentWhenSNMPGet.JPG]
[1.startWeblogic.JPG]

Please see below.
Guillaume Compagnon wrote:
>
1- What version of SNMP does the WLS SNMP agent use ?
( IMO, it is the SNMPv2)Yes.
>
2-Is it possible to use the WLS SNMP Agent to register our own MBean ? ( is
there a Factory , or an entry in JNDI ? )Not yet. We plan to do that sometime soon.
>
3- In the case, I develop my own JMX Agent, is this agent clusterable ? or
should I have several JMX Agent running , with Dynamic MBeans( because we
don't know on which machine in the cluster a MBean is ) ?You'll have to implement the clustering machinery yourself for your
agent. Or, have a separate agent for each WLS instance.
>
Guillaume

WLS SNMP Agent questions ?

1- What version of SNMP does the WLS SNMP agent use ?
( IMO, it is the SNMPv2)
2-Is it possible to use the WLS SNMP Agent to register our own MBean ? ( is
there a Factory , or an entry in JNDI ? )
3- In the case, I develop my own JMX Agent, is this agent clusterable ? or
should I have several JMX Agent running , with Dynamic MBeans( because we
don't know on which machine in the cluster a MBean is ) ?
Guillaume

Please see below.
Guillaume Compagnon wrote:
>
1- What version of SNMP does the WLS SNMP agent use ?
( IMO, it is the SNMPv2)Yes.
>
2-Is it possible to use the WLS SNMP Agent to register our own MBean ? ( is
there a Factory , or an entry in JNDI ? )Not yet. We plan to do that sometime soon.
>
3- In the case, I develop my own JMX Agent, is this agent clusterable ? or
should I have several JMX Agent running , with Dynamic MBeans( because we
don't know on which machine in the cluster a MBean is ) ?You'll have to implement the clustering machinery yourself for your
agent. Or, have a separate agent for each WLS instance.
>
Guillaume

How do I restart the SNMP agents with the original command line options?

I'm creating an application that changes the SNMP trap target configuration files and then restarts the SNMP agent. I'm currently working with the mibiisa agent. I want to make sure that I restart the service with the new trap targets but with the original command line options. How can I restart the mibiisa service with the same command line options that it originally loaded with?

It is not "Network Time" that is the problem, but actually "SystemStarter." SystemStarter is an interim kludge to enable the work or the old StartupItems until they can be converted to LaunchDaemons or LaunchAgents controlled by launchd. Launcd calls SystemStarter to launch all the unconverted StartupItems. ntpd is now under the control of launchd directly.
Launchctl is the command to load and unload the plist files, but I don't think it has a mechanism to restart a daemon.
There are start and stop commands in launchctl, but the man page indicates that they are for debugging purposes.
I also imagine you could just kill the ntp daemon and let it restart with new settings. It is most likely set to "keepAlive" so that it will automatically restart.

SUN snmpdx SNMP Agent

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