BGP Extended Communities (RFC 4360)
BGP Extended Communities, as defined in RFC 4360, is an optional transitive BGP attribute.
BGP Extended Communities provides two major advantages over Standard Communities:
• The range is extended from 4-octet (AA:NN) to 8-octet (Type:Value) to provide enough number
communities.
• Communities are structured using a new “Type” field (1 or 2-octets), allowing you to provide granular
control/filter routing information based on the type of extended communities.
deny
To reject (deny) from the two types of extended communities, route origin (rt) or site-of-origin (soo), use
this feature.
Z9500
Syntax
deny {rt | soo} {as4 ASN4:NN | ASN:NNNN | IPADDR:NN}
To remove (delete) the rule, use the no deny {rt | soo} {as4 ASN4:NN |
ASN:NNNN | IPADDR:NN} command.
Parameters
rt Enter the keyword rt to designate a Route Origin
community.
soo Enter the keyword soo to designate a Site-of-Origin
community (also known as Route Origin).
as4 ASN4:NN Enter the keyword as4 then the 4-octet AS specific
extended community number in the format ASN4:NN (4-
byte AS number:2-byte community value).
ASN:NNNN Enter the 2-octet AS specific extended community number
in the format ASN:NNNN (2-byte AS number:4-byte
community value).
IPADDR:NN Enter the IP address specific extended community in the
format IPADDR:NN (4-byte IPv4 Unicast Address:2-byte
community value).
Defaults Not configured.
Command
Modes
CONFIGURATION (conf-ext-community-list)
Command
History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Border Gateway Protocol
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