BT Global Services' extensive peering arrangements are a critical component to providing outstanding connectivity and performance for our customers as well as increased service resilience through diversified routing. Peering is the bedrock of our network and we actively expand our peering egress capacity in line with traffic growth to maintain world class performance.

BT Global Services' network capability consists of BT's European Backbone (AS5400) plus in-country networks in Ireland, and the UK (AS2856).

Policy Principles

BT Global Services has a selective peering policy - we select our peers on the basis of their performance, capability and where our traffic needs to go. Our choice of peering partner can have a direct affect on our customers and we understand that this demands very high performance from them as well as from ourselves. We select our peers carefully to achieve this goal and expand our egress capacity to them in line with traffic growth into public exchange points (where we peer both over the public infrastructure and privately) and via private peering links into our main PoP sites.

Through this policy we have established extensive, geographically diverse, peering interconnections designed to ensure minimal off-net latency to and from our customer's traffic destination. Much of our customer's traffic is domestic. We minimise latency using Nearest Exit routing to achieve more than 95% of this domestic customer traffic shipped off-net within the country it originated.

Our international traffic also benefits from our depth of reach throughout Europe at all the major European IXPs and from our connectivity to US networks via IXPs in the USA.

Our preference is to peer AS5400 with a consistent AS interconnecting in multiple geographical locations, either via IXPs or via private interconnects STM-4/GigE minimum.

Where do we peer?
BT Global Services AS5400 and AS2856 are currently present at the following Public IXPs:
	IXP Site	ASN		IXP Site	ASN
	Amsterdam AMSIX	5400		London LINX (AS5400)	5400
	Ashburn EQUINIX	5400		Madrid ESPANIX	5400
	Barcelona CATNIX	5400		New York EQUINIX	5400
	Brussels BNIX	5400		New York NYIIX	5400
	Budapest BIX	5400		Paris PARIX	5400
	Frankfurt DECIX	5400		Prague NIX	5400
	Helsinki FICIX	5400		Stockholm Netnod	5400
	London LINX (AS2856)	2856

If you want to peer with us...

If you are interested in peering with BT Global Services, IPv4 on AS2856 and/or AS5400, please visit our Peering Request Page.

If you are interested in peering with our trial IPv6 network, on AS5400, please visit our IPv6 Peering Request Page.

Any Operational problems with our peerings can be reported to peering@bt.com or to 0800 699879 for AS2856 or +31 20 200 1212 for AS5400.