docs: update userguide with SNMP Agent plugin known limitations section.

Change-Id: Ie60f23b3f67fbc0c63c07e6f91644089d09d97de
Signed-off-by: Roman Korynkevych <romanx.korynkevych@intel.com>

diff --git a/docs/release/userguide/feature.userguide.rst b/docs/release/userguide/feature.userguide.rst
index ef36632..c1463e7 100644 (file)
--- a/docs/release/userguide/feature.userguide.rst
+++ b/docs/release/userguide/feature.userguide.rst
@@ -872,6 +872,14 @@ memAvailReal OID to value represented as free memory type of memory plugin:
       </Data>
     </Plugin>
 
+**Limitations**
+
+* Object instance with Counter64 type is not supported in SNMPv1. When GetNext
+  request is received, Counter64 type objects will be skipped. When Get
+  request is received for Counter64 type object, the error will be returned.
+* Interfaces that are not visible to Linux like DPDK interfaces cannot be
+  retreived using standard IF-MIB tables.
+
 For more information on the plugin parameters, please see:
 https://github.com/maryamtahhan/collectd/blob/feat_snmp/src/collectd.conf.pod