BGP communities are a method to group a set of prefixes and apply some attributes, such as local preference, or route filtering, to all the members of that group. This grouping is done through assigning a "community" value to an IP prefix.

For example, a network administrator can create a community with the value 65000:100 and assign it to all the prefixes that belong to a specific customer. The routers in the network can then be configured to give a higher local preference to all prefixes that have that community value, ensuring that traffic for that customer will always be preferred over other customers.

A common use of BGP communities is to control the distribution of routes between different ASNs. For example, a network operator may use communities to ensure that only certain prefixes are exported to specific customers or peers.

This page lists known meanings of BGP communities for AS835

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Quick Search:

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Full Listing:

	Community	Description
	835:150	Downstream
	835:10000	Source: Cogent Transit
	835:10001	Source: HE Transit
	835:10002	Source: Zayo Transit
	835:11000	Source: TORIX
	835:11001	Source: Equinix Toronto
	835:11002	Source: Google
	835:5000	IRR Valid
	835:5001	IRR Missing or Invalid
	835:5010	RPKI Valid
	835:5011	RPKI Missing
	835:5012	RPKI Invalid
	835:20001	Append 1x to Cogent
	835:20002	Append 2x to Cogent
	835:20003	Append 3x to Cogent
	835:20009	Drop to Cogent
	835:20011	Append 1x to HE
	835:20012	Append 2x to HE
	835:20013	Append 3x to HE
	835:20019	Drop to HE
	835:20021	Append 1x to Zayo
	835:20022	Append 2x to Zayo
	835:20023	Append 3x to Zayo
	835:20029	Drop to Zayo
	835:21001	Append 1x to TORIX
	835:21001	Append 2x to TORIX
	835:21001	Append 3x to TORIX
	835:21001	Drop to TORIX
	835:21011	Append 1x to Equinix Toronto
	835:21012	Append 2x to Equinix Toronto
	835:21013	Append 3x to Equinix Toronto
	835:21019	Drop to Equinix Toronto
	835:22001	Append 1x to Google
	835:22002	Append 2x to Google
	835:22003	Append 3x to Google
	835:22009	Drop to Google

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