Connect BGP

Connecting via BGP allows you to use your own PI (provider-independent) IP address block within the Selectel infrastructure. In this case, the PI IP prefix is advertised through your AS (Autonomous System).

A public subnet from the Selectel AS is used for the connection, which links your router with the Selectel router.

Connection example

A dedicated server with routing software acts as a router, assigned an IP address 203.0.113.1 from a dedicated public subnet 203.0.113.0/29. On the Selectel router, a service IP address of the subnet is used as a gateway 203.0.113.6.

Two routes to Selectel border routers are configured on the server — 198.51.100.10/32 and 198.51.100.20/32 via gateway 203.0.113.6 on the Selectel router. Your router establishes two multihop BGP sessions with the Selectel border routers, which act as BGP neighbors.

Connect BGP

Ensure you have a router—any equipment that supports the BGP dynamic routing protocol:
- for dedicated servers — a firewall, a hosted router, or routing software deployed on the server;
- for clouds powered by VMware — EDGE;
- for cloud servers — routing software deployed on the server.
Ensure you have a subnet:
- for a dedicated server — dedicated public subnet;
- for a cloud server — public subnet;
- for a public cloud powered by VMware — Direct Connected subnet.
You need to assign one of the subnet addresses to your router; in the example — 203.0.113.1. A service subnet address will be used as a gateway on the Selectel router; in the example — 203.0.113.6.
Ensure you have a route object of the advertised PI network created in the RIPE DB. The origin field contains the registered public number of your AS.
Check the subnet gateway:
- for a dedicated server — in the Control Panel, from the top menu, click Products → Dedicated Servers → Network → Subnets tab → subnet page → Default gateway;
- for a cloud server — in the Control Panel, from the top menu, click Products → Cloud Servers → Network → Public networks tab → open the subnet card → Gateway;
- for a public cloud powered by VMware — in the Control Panel, from the top menu, click Products → Cloud powered by VMware → Virtual Data Centers → data center page → subnet row → Gateway.
Configure one of the static routing options on your router:
- a default static route to the 0.0.0.0/0 subnet via the next-hop — the subnet gateway you checked in step 4, in the example — 203.0.113.6;
- or two static routes to the Selectel border routers via the next-hop — the subnet gateway you checked in step 4. In the example — routes to 198.51.100.10/32 and 198.51.100.20/32 via next-hop 203.0.113.6. To get the addresses of the border routers, create a ticket.
Set the TTL value to at least 10 on your router so that the BGP session always remains operational regardless of the Selectel network topology.
Enable the MultiHop BGP option on your router.
In the Control Panel, from the top menu, click Products and select Dedicated Servers.
Go to the Network section.
Click Connect BGP.
Enter the IP address for the BGP session — a public IP address that you assigned to your router; in the example — 203.0.113.1.
Select a routing policy—the routes that Selectel will advertise to your equipment:
- default route only — only the 0.0.0.0/0 route;
- full-view — the entire global routing table;
- default route only + full-view — simultaneously the 0.0.0.0/0 route and the entire global routing table.
Enter the AS number.
If your AS is a transit AS, select the I have an AS-SET checkbox and specify the AS-SET name.
Select a payment period and check the total cost.
Click Pay. When the connection is ready, we will send you a ticket.