[AGENT++] Fwd: retransmit timeout

Florian Lohoff f at zz.de
Thu Mar 2 11:08:26 CET 2017


Hi,
i used snmp++ to write an interface check for an icinga2 instance. I
moved the installation from a VM to Real Hardware and suddenly i get
random SNMP timouts which i dont understand. 

When i issue a tcpdump i see unexpected early retransmits of the original
request and i do see a "ICMP Port unreachable" for the response. It
seems something is horribly broken concerning the retransmit timeing:

	CTarget                 target;
	[ ... ]
	target.set_retry(2);
	target.set_timeout(100);
	[ ... ]
	status=snmp->get(*pdu, target);

This is basically the code. The tcpdump shows retransmits after ~5ms not
1000ms as the code and the Documentation imply.

I am bit puzzled.

Flo
-- 
Florian Lohoff                                                 f at zz.de
             UTF-8 Test: The 🐈 ran after a 🐁, but the 🐁 ran away


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