Merge pull request #3299 from syn-bit/ios-remove-expression-values

Remove constantly updating value from custom SNMP OID

CHANGELOG.md

@@ -39,6 +39,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 - Updated slackdiff.rb to use new files.getUploadURLExternal slack file upload API instead of deprecated files.upload (@varesa)
 - Updated source/output files to reference a Source/Outputb module to avoid namespace duplication (@laf, @robertcheramy)
 - ios: Hide WLAN PSK, AP profile dot1x password, AP profile mgmtuser password/secret and radius COA server-key (@devon-mar)
+- ios: remove values from custom SNMP OID's, set by an EEM script (@syn-bit)
 
 ### Fixed
 - fixed error for ibos when remove_secret is set (@dminuoso)

examples/device-simulation/yaml/iosxe_C9200L-24P-4G_17.09.04a.yaml

@@ -281,6 +281,10 @@ commands:
     snmp-server host 10.42.0.35 vrf Mgmt-vrf informs version 2c AAAAAAAAAABBBBBBBBBB  tty vtp
     snmp-server host 10.42.0.36 vrf Mgmt-vrf informs version 3 auth oxidized  bfd bridge transceiver
     !
+    snmp mib expression owner nat name 1
+      expression 42
+    snmp mib expression owner oxidized name rocks
+      expression 42
     !
     !
     !
@@ -485,6 +489,10 @@ oxidized_output: |
   snmp-server host 10.42.0.35 vrf Mgmt-vrf informs version 2c AAAAAAAAAABBBBBBBBBB  tty vtp
   snmp-server host 10.42.0.36 vrf Mgmt-vrf informs version 3 auth oxidized  bfd bridge transceiver
   !
+  snmp mib expression owner nat name 1
+    expression <value removed>
+  snmp mib expression owner oxidized name rocks
+    expression <value removed>
   !
   !
   !

lib/oxidized/model/ios.rb

@@ -124,6 +124,8 @@ class IOS < Oxidized::Model
       cfg.gsub! /^ tunnel mpls traffic-eng bandwidth[^\n]*\n*(
                     (?: [^\n]*\n*)*
                     tunnel mpls traffic-eng auto-bw)/mx, '\1'
+      # get rid of values of custom SNMP OID's
+      cfg.gsub! /^(\s+expression) \d+$/, '\\1 <value removed>'
       cfg
     end
   end