Hi Lee, Thanks for the response. No I didn't change the MTU on every router and switches between client and server.
>What is the relation between MTU and max_repetitions.? > If we change the MTU to jumbo frame like 9000, what should be these > macros (SNMP_MAX_MSG_SIZE , SNMP_MAX_LEN ) should be set ? > Is there any other changes in need to perform? Do you have any inputs on the above questions? Thanks Giridhar -----Original Message----- From: Lee [mailto:ler...@gmail.com] Sent: Wednesday, September 16, 2015 5:13 PM To: AR, Giridhar Cc: net-snmp-coders@lists.sourceforge.net Subject: Re: guidelines to increase the MTU size On 9/16/15, AR, Giridhar <giridhar.raja...@netapp.com> wrote: > Hi > > Need guidelines to increase the MTU size (example from 1500 to 9000) > Our application is using snmpv2. When the MTU size (9000) is changed > on interface of client and server, Snmp queries are timed out. Did you also change the MTU on every router & switch between the client and server to be 9000? If no, that's probably why queries are timing out Regards, Lee > We collected the packet traces on both client and server. Client is > receiving the response from server, but client is dropping the packet. > Following are the test cases tried > > case client MTU server MTU > result > > 1 1500 1500 > passed > > 2 1500 9000 > failed > > 3 9000 1500 > passed > > 4 9000 9000 > failed > > > Looked at the client code, uses the net-snmp-code, > > > > #define SNMP_MAX_MSG_SIZE 1472 > #define SNMP_MAX_LEN 1500 > > And by default max_repetitions is set 20. If we set to 1, snmp queries > are successful. > > What is the relation between MTU and max_repetitions.? > If we change the MTU to jumbo frame like 9000, what should be these > macros (SNMP_MAX_MSG_SIZE , SNMP_MAX_LEN ) should be set ? > Is there any other changes in need to perform? > > > Thanks > Giridhar > > > > > > ------------------------------------------------------------------------------ Monitor Your Dynamic Infrastructure at Any Scale With Datadog! Get real-time metrics from all of your servers, apps and tools in one place. SourceForge users - Click here to start your Free Trial of Datadog now! http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140 _______________________________________________ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
