Community List

Community lists define named collections of BGP community values used for route filtering and matching in route maps. NX-OS supports standard community lists (matching exact community values) and regex-based community lists (matching community strings using regular expressions). Community lists are referenced in route map match clauses to implement community-based routing policies.

Diagram

Classes

configuration (nxos.devices)

Name	Type	Constraint	Mandatory	Default Value
community_lists	List	[community_lists]	No

community_lists (nxos.devices.configuration)

Name	Type	Constraint	Mandatory	Default Value
name	String		Yes
mode	Choice	standard, expanded	No
entries	List	[entries]	No

entries (nxos.devices.configuration.community_lists)

Name	Type	Constraint	Mandatory	Default Value
seq	Integer	min: 1, max: 4294967294	Yes
action	Choice	permit, deny	No
regex	String		No
communities	List	String	No

Examples

Example 1: Standard community list matching specific community values

nxos:
  devices:
    - name: LEAF1
      configuration:
        community_lists:
          - name: CL-STANDARD-TENANT
            mode: standard
            entries:
              - seq: 10
                action: permit
                communities:
                  - "regular:as2-nn2:65000:100"
                  - "regular:as2-nn2:65000:200"
              - seq: 20
                action: deny

Example 2: Regex-based community list for flexible pattern matching

nxos:
  devices:
    - name: SPINE1
      configuration:
        community_lists:
          - name: CL-REGEX-DATACENTER
            mode: expanded
            entries:
              - seq: 10
                action: permit
                regex: "65000:.*"

Example 3: Multiple community lists for a multi-tenant EVPN fabric

nxos:
  devices:
    - name: BORDER-LEAF1
      configuration:
        community_lists:
          - name: CL-TENANT-A
            mode: standard
            entries:
              - seq: 10
                action: permit
                communities:
                  - "regular:as2-nn2:65000:1010"
                  - "regular:as2-nn2:65000:1020"
          - name: CL-TENANT-B
            mode: standard
            entries:
              - seq: 10
                action: permit
                communities:
                  - "regular:as2-nn2:65000:2010"
                  - "regular:as2-nn2:65000:2020"
          - name: CL-NO-EXPORT
            mode: expanded
            entries:
              - seq: 10
                action: permit
                regex: "no-export"