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.
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
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