Administrator Guide

n - network, D - denied, S - stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network From Reuse Path
d 55.0.0.0/24 172.16.0.2 00:36:23 200
Dell#
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.
Z-Series
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.
Version 7.8.1.0 Introduced on the S-Series.
Version 7.7.1.0 Introduced on the C-Series.
Version 7.6.1.0 Introduced on the E-Series.
Related
Commands
permit — configures to add (permit) rules.
show ip extcommunity-list — displays the extended community list.
362 Border Gateway Protocol