Juniper ACX1000 Configuration Manual page 1529

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For more information about BGP community attributes, see the "Configuring the Extended
Communities Attribute" section in the Routing Policies, Firewall Filters, and Traffic
Policers Feature Guide.
For specifying the BGP community attribute only, you also can specify
one of the following well-known community names defined in RFC 1997:
—Routes containing this community name are not advertised to other
no-advertise
BGP peers.
no-export —Routes containing this community name are not advertised outside a BGP
confederation boundary.
—Routes containing this community are advertised to IBGP peers
no-export-subconfed
with the same AS number, but not to members of other confederations.
llgr-stale —Adds a community to a long-lived stale route when it is readvertised.
—Marks routes which a BGP speaker does not want to be retained by LLGR. The
no-llgr
Notification message feature does not have any associated configuration parameters.
NOTE: Extended community attributes are not supported at the
routing-options]
at the
[edit policy-options]
extended communities, see the Routing Policies, Firewall Filters, and Traffic
Policers Feature Guide.
As defined in RFC 8092, BGP large community uses 12-byte encoding and the format for
BGP large
community-ids
large: global-administrator:assigned-number:assigned-number
large indicates BGP large community.
is the administrator. It is a 4-byte AS number.
global-administrator
assigned-number is a 4-byte value used to identify the local provider. BGP large community
uses two 4-byte assigned number to identify the local provider.
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
Example: Summarizing Static Routes Through Route Aggregation
aggregate on page 1420
generate on page 1535
static
hierarchy level. You must configure extended communities
hierarchy level. For information about configuring
is:
Chapter 41: Configuration Statements
community-ids
[edit
as
1471