BGP Communities

BGP Action Communities

Action communities are available to WiscNet BGP speaking members. Please contact support@wiscnet.net for setup and further information.

Used to control traffic within WiscNet's backbone

Useful if you have multiple BGP sessions to WiscNet where you may want to have a primary and a backup
Also useful if you have another BGP provider other than WiscNet.

Encoding	Standard Community	Large Community	Action
n/a	65535:0	none	GRACEFUL_SHUTDOWN - RFC8326 - Accepted from Customers and Peers
n/a	65535:666	none	BLACKHOLE - RFC7999 - RTBH - same as 2381:911
n/a	2381:911	none	RTBH Blackhole trigger - Same as 65535:666 - customers only
2381:A000 A - Action 1 - Prepend 1x 2 - Prepend 2x 3 - Special 4 - Prepenx 4x 6 - No Advertise 8 - Localpref / Med	2381:1000	none	Global - Prepend 1x to all peers
	2381:2000	none	Global - Prepend 2x to all peers
	2381:3SSS	none	Special actions, such as Cache leaking. Contact for details.
	2381:4000	none	Global - Prepend 4x to all peers
	2381:6000	none	Global - Do not advertise (no-export)
	2381:8LLL	none	Adjust internal BGP attributes within AS2381 for dual homed peers
	2381:8840	none	Localpref - Prefer Highest: +40
	2381:8820	none	Localpref - Prefer High: +20
	2381:8780	none	Localpref - Depref/Lower: -20
	2381:8760	none	Localpref - Depref/Lowest: -40
	2381:8507	none	MED - Prefer: -3
	2381:8517	none	MED - Depref: +7

Community 6500X (65000 - 65009) : Used for Peer Relationship Types

Large communities are 3 fields: 2381:Function:Parameter

Standard Community	Large Community	Description
6500P:A000 P - Peer Type A - Action	2381:A000:6500P A - Action P - Peer Type	Encoding Method
6500P:A000	2381:A000:6500P	Peer Types: 1 - Transit 2 - Public Peer (IX) 3 - Private Peer (PNI) 4 - Research (R&E Community) 8 - Customer
6500P:A000	2381:A000:6500P	Actions: 1 - Prepend 1x 2 - Prepend 2x 4 - Prepenx 4x 6 - No Advertise
Examples
65003:1000	2381:1000:65003	Prepend 1x to all Private Peers
65002:4000	2381:4000:65002	Prepend 4x to all Public Peers
65001:6000	2381:6000:65001	Do Not Advertise to Transit providers
65008:6000	2381:6000:65008	Do Not Advertise to WiscNet Customers

Community 6540X (65400 - 65409) : Used for Specific BGP Peer ASNs that WiscNet Peers with.

Large communities are 3 fields: 2381:Function:Parameter

Standard Community	Large Community	Description
6540A:ASN A - Action ASN - AS Number	2381:6540A:ASN A - Action ASN - AS Number	Encoding Method
65401:ASN	2381:65401:ASN	Prepend 1x to ASN
65402:ASN	2381:65402:ASN	Prepend 2x to ASN
65404:ASN	2381:65404:ASN	Prepend 2x to ASN
65406:ASN	2381:65406:ASN	Do Not Advertise to ASN
Examples
65402:1299	2381:65402:1299	Prepend 2x to AS 1299 (Arelion) - Standard or Large Community
65406:6939	2381:65406:6939	Do Not Advertise to AS 6939 (Hurricane Electric) - Standard or Large Community
none	2381:65404:396986	Prepend 4x to AS 396986 (Bytedance - 4 byte ASN) Large Community Only
none	2381:65406:396986	Do Not Advertise to AS 396986 (Bytedance - 4 byte ASN) - Large Community Only

WiscNet embeds informational code in to BGP routes. This code is always 5 digits starting with 5.

These are for informational purposes to learn the peer relationship type and region the route was learned.

2381:5RCCR

2 - Region	3, 4 - Code - POP	5 - Relationship
1 - North West (Superior area)	2 digit POP code unique per region. 01-99	1	Transit
2 - North Central (Ashland area)		2	Peer - Public (IX)
3 - North East (Marinette area)		3	Peer - Private (PNI)
4 - West (Minneapolis area)		4	Research (R&E Community)
5 - Central (Wausau area)		5	Cache
6 - East (Green Bay area)		7	Aggregate
7 - South West (Platteville area)		8	Customer
8 - South (Madison area)
9 - South East (Milwaukee area)
Examples
2381:51011	Northwest Region, Pop # 01, Transit
2381:59342	South East Region, Pop # 34, Private Peer

3 digit communities are uniquely defined per individual peer or transit. For informational purposes