Remove constantly updating value from custom SNMP OID

[syn-bit]

Adding a custom SNMP OID means having a different "expression " line each time the config is pulled. Add a rule to remove the expression value.

EEM code to generate the custom SNMP OID is:

event manager applet TotalNatTranslations
event timer watchdog time 300 maxrun 60
action 010 cli command "enable"
action 020 cli command "configure terminal"
action 030 cli command "do-exec show ip nat translations total"
action 040 regexp "^.+\s([0-9]+)" "$_cli_result" match total_translations
action 050 cli command "snmp mib expression owner nat name 1"
action 060 if $_regexp_result eq "1"
action 070 cli command "expression $total_translations"
action 080 else
action 090 cli command "expression 0"
action 100 cli command "exit"
action 110 end

The resulting configuration block is:

snmp mib expression owner nat name 1
description Total active translations
value type integer32
expression 1234
!

After this commit the resulting configuration block is:

snmp mib expression owner nat name 1
description Total active translations
value type integer32
expression
!

Pre-Request Checklist

• Passes rubocop code analysis (try rubocop --auto-correct)
• Tests added or adapted (try rake test)
• Changes are reflected in the documentation
• User-visible changes appended to CHANGELOG.md

Description

[robertcheramy]

This is an uncommon use case for me, but if you made the effort of submitting a PR, it is worth integrating it into oxidized. Thanks for your PR!

The gsub should be placed within the show running-config command (not cmd :all), before returning the resulting cfg:

oxidized/lib/oxidized/model/ios.rb

Line 121 in 3ec983b

cfg

Also please document your Change in CHANGELOG.md