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Rule 10 - MAC Address Correlation Handling for Non-Unique MAC Addresses in ServiceNow

Rule Synopsis

These are the rule/s that control whether CI Sync uses non-unique MAC Addresses when attempting to match (correlate) existing CIs with incoming source system assets.

Syncfish treats the following as non-unique (i.e. highly reused) MAC Addresses:

  1. Locally Administered MAC Addresses.

  2. Certain VPN client related MAC Addresses (e.g. Fortinet VPN client).

Rule Details and Default

  • By default, CI Sync does not use non-unique MAC Addresses when attempting to match (correlate) existing CIs with incoming source system assets.

  • Also, CI Sync contains default logic (regex expression values) to define which MAC Address patterns constitute non-unique ones.

Override Options

Context

Syncfish generally recommend customers do not disable the default setting (to include non-unique MAC Addresses in CI Sync correlation logic).

However, customers may wish to update CI Sync’s default determination logic to include additional expressions that constitute non-unique MAC Addresses (e.g. for specific VPN clients in use within the organisation).

Override

  1. While not recommended, the rule can be amended does use non-unique MAC Addresses when attempting to match (correlate) existing CIs with incoming source system assets.

  2. The default logic (regex expression values) to define which MAC Address patterns constitute non-unique ones can be updated to expand the definition of non-unique MAC Addresses.

Overriding via Connection Settings

Also, customers can perform the override using a “Connection Setting” via the CI Sync User Interface (i.e. customers can perform the overrides themselves). Additional information for this is available via the following documentation:

  1. For a general overview of CI Sync Connection Settings please read Understanding the use of CI Sync Connection Settings.

  2. For the specific CI Sync Connection Setting/s related to the rule described on this page please read Search Rules.

For documentation on all CI Sync Connection Settings please visit the page tree Connection Setting Guides.

Additional Information

N/A

N/A

Support Model for Rule Overrides

Question: Can overrides be performed by customers without a Syncfish Extended Implementation and Support Plan?

Answer: Yes (via self-service in the CI Sync UI)

Question: Which Syncfish Extended Implementation and Support Plan is required to obtain overrides of this rule

Answer: Either a Bronze Plan, Silver Plan or Gold Plan (for customers wanting Syncfish assistance to perform overrides of this rule)