Difference between revisions of "SNMP"
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snmpGet [[OID's]] sys Name.0 -S SNMPCOLLECTORNAME -P 3002 -r 3 -t 2 -c '&V3,[[AccessMode]]=Auth-MD5,[[Security Name]]=useridtext,[[Context Name]]=,[[Auth Passwd]]=authpwtext' | snmpGet [[OID's]] sys Name.0 -S SNMPCOLLECTORNAME -P 3002 -r 3 -t 2 -c '&V3,[[AccessMode]]=Auth-MD5,[[Security Name]]=useridtext,[[Context Name]]=,[[Auth Passwd]]=authpwtext' | ||
</pre> | </pre> | ||
+ | |||
+ | |||
+ | OIDs that use strings as the indexes | ||
+ | jnxSubscriberPortTerminatedCounter.3.112.115.51 = 14825 | ||
+ | First int = length | ||
+ | Proceeding ints, convert to hex, then hex to ascii | ||
+ | in the example above | ||
+ | <pre> | ||
+ | Length = 3 | ||
+ | 112 -> 70 -> p | ||
+ | 115 -> 73 -> s | ||
+ | 51 -> 33 --> 3 | ||
+ | index = ps3 | ||
+ | </pre> | ||
+ | netsnmp will translate this when querying ie jnxSubscriberPortTerminatedCounter."ps3" | ||
====Net-SNMP==== | ====Net-SNMP==== | ||
+ | |||
CLI command | CLI command |
Revision as of 11:45, 8 April 2020
Simple Network Management Protocol
Contents
Statistics
- Source: Manager (Poller)
- Destination: Device
- Port: 161 UDP
Traps / Alarms
- Source: Device
- Destination: Manager
- Port: 162 UDP
SNMP v3
Proviso
SNMP community string as used in the gui
&V3,[[Access Mode]]=Auth-MD5,[[Security Name]]=useridtext,[[Context Name]]=,[[Auth Passwd]]=authpwtext
SNMP Communtity string as used in the cli
snmpGet [[OID's]] sys Name.0 -S SNMPCOLLECTORNAME -P 3002 -r 3 -t 2 -c '&V3,[[AccessMode]]=Auth-MD5,[[Security Name]]=useridtext,[[Context Name]]=,[[Auth Passwd]]=authpwtext'
OIDs that use strings as the indexes
jnxSubscriberPortTerminatedCounter.3.112.115.51 = 14825
First int = length Proceeding ints, convert to hex, then hex to ascii in the example above
Length = 3 112 -> 70 -> p 115 -> 73 -> s 51 -> 33 --> 3 index = ps3
netsnmp will translate this when querying ie jnxSubscriberPortTerminatedCounter."ps3"
Net-SNMP
CLI command
./snmpget -v 3 -a MD5 -A 'authpwtext' -l authNoPriv -u useridtext 10.78.252.19 iso.3.6.1.2.1.1.5.0
Nice guide to comparing Juniper CLI to SNMP
- RFC1213 - SNMPv1
- RFC3416 - SNMPv2c
- RFC3411-3415 - SNMPv3
Grafana
Because collectd doesnt us an inventory model - it doesnt appear to keep track or report on missed polls / values. We have to figure this out at the Grafana layer - looking for nulls. Except this isnt easy, we instead have to count how many values we have. This only works for the past 7 days / your raw retention period.
Find how many null values there are (thus missed pollings) - by counting how many values we have
- Series - Choose a metric and using * for the hosts
- Functions
scale(0) offset(1) summarize(1h, sum, true)