NESOXNETWORK
PRIVATE PROJECT
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High Performance
Network Infrastructure

Nesox Network delivers modern, reliable and high performance connectivity across Europe. We build the foundation for a better internet.

IPv6
IPv6 Transit is free.Free IPv6 transit is available for valid networks, labs and communities at active Nesox locations.
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Open PeeringEveryone is welcome
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RPKI & IPv6Secure by design
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High PerformanceBuilt for the future
ASNAS215685AS-NESOX
IPv6 TransitFREEAt active PoPs
IP VersionIPv4 / IPv6Dual Stack
RPKIEnabled ?Route Origin Validation
Looking GlassAvailableNetwork Diagnostics
Network TypeTransit / PeeringCarrier Neutral
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Private, non-commercial project

Nesox Network is operated as a private project. This website and its network tools are not presented as a commercial telecommunications service.

We follow an open peering policy. If you are interested in peering with us, just reach out via one of our existing contacts.

  • Open for everyone
  • No ratio requirements
  • No settlement
  • Route Server available at most locations

? LOCATIONS

Velbert, DENESOX NETWORKActive
Frankfurt, DENESOX NETWORKActive
Amsterdam, NLNESOX NETWORKActive
More locations
coming soon.
BGP ROUTING MAP

See the network connect.

Animated overview of the Nesox backbone and its routing relationships between Velbert, Frankfurt and Amsterdam.

3Active PoPs
AS215685Core ASN
IPv6Free transit
Backbone Peering Transit
BGP / LIVE VIEW
AS215685 EUROPE
AS215685 NESOX CORE AMS AMSTERDAM FRA FRANKFURT VEL VELBERT IX UP
BGP COMMUNITY POLICY

AS215685 BGP Communities

BGP Communities are labels attached to routes. Authorized downstreams can use them to tell AS215685 how a prefix should be handled inside the network or exported to external neighbors. For Large Communities, 215685 identifies AS215685, the middle value selects the action, and the final value identifies a target AS or control value.

Traffic Engineering Controls where a route is exported or how often AS215685 is prepended on export. 215685:3xx:<ASN>
Local Preference Influences path selection inside AS215685. The highest supported value wins. 215685:200:<VALUE>
RTBH / Blackhole Marks an authorized prefix for Remote Triggered Blackholing and prevents external export. 215685:666:666

Traffic Engineering

These control communities are carried inside AS215685, evaluated on eBGP export, and then removed before routes are advertised to external neighbors.

Large CommunityMeaning
215685:300:<ASN>Do not announce the route to the specified external AS.
215685:301:<ASN>Prepend AS215685 once when exporting to <ASN>.
215685:302:<ASN>Prepend AS215685 twice when exporting to <ASN>.
215685:303:<ASN>Prepend AS215685 three times when exporting to <ASN>.
215685:310:0Do not announce the route to transit providers.
215685:311:0Do not announce the route to peers or IXP route servers.
215685:312:0Keep the route inside AS215685 only; no eBGP export.

If multiple prepend communities exist for the same target AS, the highest level wins: 303 before 302 before 301. A matching 300 no-announce community takes precedence over prepending.

  • 215685:300:62255 — do not announce to AS62255.
  • 215685:302:62255 — prepend AS215685 twice when exporting to AS62255.
  • 215685:310:0 — peering/IXP export remains possible, transit export is blocked.
  • 215685:311:0 — transit export remains possible, peer/IXP export is blocked.
  • 215685:312:0 — distribute the route inside AS215685 only.

IXP note: On a route-server session, the directly connected BGP neighbor AS is the route-server AS. Therefore 215685:300:<ASN> can suppress export to the route server itself, but it cannot automatically suppress a single IXP member behind that route server. Use the communities provided by the relevant IXP or route server for per-member export control.

Local Preference

Local Preference affects path selection inside AS215685 only. If more than one supported LocalPref community is present, the highest value wins. Without one of these communities, the normal policy of the respective session applies.

Large CommunityLocalPref
215685:200:5050
215685:200:100100
215685:200:150150
215685:200:200200

Blackhole / RTBH

RTBH allows an authorized downstream to send an authorized prefix to a blackhole sink. The prefix is installed as RTD_BLACKHOLE and carried inside AS215685 via iBGP.

CommunityMeaning
215685:666:666AS215685 Remote Triggered Blackhole.
65535:666RFC 7999 BLACKHOLE; normalized internally to 215685:666:666 for authorized downstreams.

RTBH is not exported to transit providers, peers, IXPs or downstreams. After successful downstream authorization, RTBH may bypass the normal IPv4 /24 and IPv6 /48 length limits and the RPKI-invalid rejection. The prefix must still be authorized by the configured prefix set and permitted AS path.

Standard Communities

Standard CommunityBehavior
65535:65281 (NO_EXPORT)Do not export the route from AS215685 over eBGP.
65535:65282 (NO_ADVERTISE)Do not advertise the route to any further BGP neighbor, including iBGP.
65535:666 (BLACKHOLE)RTBH request from an authorized downstream.

Informational Communities

AS215685 sets these communities itself. They are intended for diagnostics, for example in birdc show route all, and are not accepted from customers as trusted classification.

Large CommunityMeaning
215685:100:<ASN>The route was learned directly from <ASN>.
215685:110:1Learned from transit.
215685:110:2Learned from a peer or IXP.
215685:110:3Learned from a downstream/customer.
215685:110:4Originated inside AS215685.

On IXP route-server sessions, 215685:100:<ASN> refers to the directly connected route-server AS and not necessarily to the original IXP member.

Combinations and precedence

Communities can be combined. If rules conflict, the more restrictive export or blackhole rule takes precedence.

Blackhole ? AS-internal 312 ? internal-only 300 ? no-announce to target AS 303 / 302 / 301 ? highest prepend level wins
  • 215685:310:0 + 215685:302:62255: if AS62255 is reached as transit and transit is blocked, the prepend has no practical additional effect there.
  • 215685:300:62255 + 215685:303:62255: no-announce wins; the route is not exported to AS62255.
  • 215685:312:0 + any prepend: internal-only wins; there is no external export.
  • 215685:666:666 + other TE communities: blackhole wins; RTBH remains internal to AS215685.
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LOOKING GLASS

Network Diagnostics

Our Looking Glass provides network diagnostic tools to help you analyze connectivity and routing.

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CONTACT

Network operations contacts.

Direct contacts for operations, abuse reports and peering requests.

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For general questions that do not belong directly to NOC, Abuse or Peering.

Nesox Network AS215685 Independent network infrastructure focused on open interconnection and reliable routing.