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Update documentation for the SNMP uptime timestamp.

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fbernon 2007-10-10 08:05:34 +00:00
parent ebd167b658
commit 2a5209bb5a
1 changed files with 9 additions and 0 deletions
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doc/snmp_agent.txt
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@ -98,6 +98,15 @@ Exactly every 10 msec the SNMP uptime timestamp must be updated with
snmp_inc_sysuptime(). You should call this from a timer interrupt snmp_inc_sysuptime(). You should call this from a timer interrupt
or a timer signal handler depending on your runtime environment. or a timer signal handler depending on your runtime environment.
A alternative way it to update the SNMP uptime timestamp is to do a call like
snmp_add_sysuptime(100) each 1000ms (which is bigger "step", but call to
a lower frequency). Another one is to not call snmp_inc_sysuptime() or
snmp_add_sysuptime(), and to define the SNMP_GET_SYSUPTIME(sysuptime) macro.
This one is undefined by default in mib2.c. SNMP_GET_SYSUPTIME is called inside
snmp_get_sysuptime(u32_t *value), and enable to change "sysuptime" value only
when it's queried (any direct call to "sysuptime" is changed by a call to
snmp_get_sysuptime).
3 Private MIBs 3 Private MIBs
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