Description

This article explains the interval of cached MIB2D data update. The time interval is 5 seconds.

Symptoms

Cached MIB2D data will update at 5 sec intervals.

Example:

Monitor input packets with cached MIB2D data.

Topology

            <------------------------------- ping
  +--------+                                +--------+
  |   MX   |ge-0/0/0.0            ge-0/0/0.0|   MX   |
  |  (R1)  |--------------------------------|  (R2)  |
  |        |SNMP ifIndex 542                |        |
  +--------+A                               +--------+
            |
     monitor point


Test results :

user@R1> show snmp mib walk ifInUcastPkts | match .542 | refresh 1
---(refreshed at 2018-01-24 22:34:34 PST)---
ifInUcastPkts.542 = 120                        <<<<<< 1
---(refreshed at 2018-01-24 22:34:36 PST)---
ifInUcastPkts.542 = 120                        <<<<<< 2
---(refreshed at 2018-01-24 22:34:37 PST)---
ifInUcastPkts.542 = 120                        <<<<<< 3
---(refreshed at 2018-01-24 22:34:38 PST)---
ifInUcastPkts.542 = 120                        <<<<<< 4
---(refreshed at 2018-01-24 22:34:39 PST)---
ifInUcastPkts.542 = 120                        <<<<<< 5
---(refreshed at 2018-01-24 22:34:40 PST)---
ifInUcastPkts.542 = 126                        <<<<<< 1
---(refreshed at 2018-01-24 22:34:41 PST)---
ifInUcastPkts.542 = 126                        <<<<<< 2
---(refreshed at 2018-01-24 22:34:42 PST)---
ifInUcastPkts.542 = 126                        <<<<<< 3
---(refreshed at 2018-01-24 22:34:43 PST)---
ifInUcastPkts.542 = 126                        <<<<<< 4
---(refreshed at 2018-01-24 22:34:44 PST)---
ifInUcastPkts.542 = 126                        <<<<<< 5
---(refreshed at 2018-01-24 22:34:45 PST)---
ifInUcastPkts.542 = 131                        <<<<<< 1
---(refreshed at 2018-01-24 22:34:46 PST)---
ifInUcastPkts.542 = 131                        <<<<<< 2
---(refreshed at 2018-01-24 22:34:47 PST)---
ifInUcastPkts.542 = 131                        <<<<<< 3
---(refreshed at 2018-01-24 22:34:48 PST)---
ifInUcastPkts.542 = 131                        <<<<<< 4
---(refreshed at 2018-01-24 22:34:49 PST)---
ifInUcastPkts.542 = 131                        <<<<<< 5
---(refreshed at 2018-01-24 22:34:50 PST)---
ifInUcastPkts.542 = 136                        <<<<<< 1

Solution

This behavior is by design and is part of the specification.