Re: snmpd sleeps when snmpgets are run
"Kyle Tucker" <[email protected]>
| Newsgroups | gmane.network.net-snmp.user |
|---|---|
| Message-ID | <[email protected]> |
> Net-SNMP 5.2.2 on Solaris 8. Before I go digging further,
> is there any connection between snmpd on a given system and
> the running of snmpget commands on that same system to a
> second remote one, such that the running of the snmpget's
> would disallow connections to snmpd on the first? I know it
> sounds crazy, but that's the behavior we are seeing. Every
> 30 minutes we are running a series of 20 snmpgets to a system
> (for Nagios) whose snmpd is down and each snmpget times out.
> During the running of this series, snmpd will not accept
> connections. Even ones from the same host time out using
> snmpget, even to the loopback interface. A truss shows snmpd
> just sleeping and a snoop shows just incoming packets to 161,
> never responded to. Make any sense to anyone? Thanks.
Just to diagram what's happening. Host A runs an snmpget on host
B which runs an "extend" script. That script runs 20+ snmpgets
on host C and returns a summary to host A's snmpget command because
host C is not reachable directly from A. If snmpd is down on host
C, while the extend script is doing 20+ timeouts, snmpd on host B
won't answer any further snmpgets from host A. As soon as the the
extend script finishes up, host B's snmpd wakes right up and starts
answering A's snmpgets. I swear! :)
----- -----
| A | -- snmpget --> | B | snmpd (up)
----- -----
extend script -----
-- 20+ snmpgets --> | C | snmpd (down)
-----
--
- Kyle
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[email protected] http://www.panix.com/~kylet
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