General information about the Selectel Global Router service
A global router allows you to connect infrastructure in Selectel with a private network at the L3 level. You cannot use a global router to establish connectivity with infrastructure outside Selectel; to do this, use the Direct Connect or Global Connect services, or set up a connection over the internet.
With the Global Router, you can connect:
- different products and services: Dedicated Servers, Colocation, A-DC, Cloud Platform (Cloud Servers, Managed Kubernetes, Managed Databases), S3, VMware-based Cloud, Load Balancer, File Storage , Desktop as a Service (DaaS) ;
- servers in different pools: dedicated servers, colocated servers, cloud servers, Managed Kubernetes nodes;
- private networks from different accounts.
For uninterrupted operation, all equipment used for the service is reserved according to the N+1 scheme.
You can work with the global router in the Control Panel, via the API and Terraform.
The service supports user types and roles.
Records of global router operations are saved in audit logs.
Operating Principle
The Global Router routes traffic between connected private subnets, providing L3 network connectivity between different services and pools.
The global router role is performed by a separate routing table located on multiple physical routers. To do this, in each pool, a dedicated and redundant physical router is allocated that serves only global router networks. These physical routers are combined into a single IP/MPLS routing domain.
Network fault tolerance is ensured through equipment reservation, dynamic routing protocols, and routing redundancy. The health of the entire network does not depend on the health of any individual segment. For example, if connectivity to one of the pools is lost, the rest of the network will continue to function.
Example of connecting networks to a Global Router:
Details and benefits of setting up network connectivity at the L3 level are described in the blog article Connecting Projects Across Different Data Centers.
Bandwidth
The base bandwidth of a global router is:
- within a region — 25 Gbps;
- between regions — 1 Gbps.
The base bandwidth is set for the account — it is distributed among all global routers in the account, rather than being allocated to each router separately.
The actual throughput depends on your server port bandwidth.
The maximum supported MTU of a global router is 8,500 bytes.
Bandwidth between regions can be increased. The maximum bandwidth depends on the regions connected:
- between Moscow and St. Petersburg — 10 Gbps;
- between Novosibirsk and Moscow — 5 Gbps;
- between Novosibirsk and St. Petersburg — 5 Gbps.
If you need more bandwidth than the indicated values, the increase is negotiated individually.
Bandwidth within a region can also be increased. All options for increasing bandwidth within a region are negotiated individually.
To get a cost estimate and approve the increase, create a ticket.
Limits and Restrictions
Subnets connected to the same Global Router must not overlap—they cannot contain the same IP addresses. Having the same IP addresses in subnets of the same router may cause routing issues.
Limits are set for the number of Global Router objects:
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in one account, you can create no more than 5 global routers (5 independent private routed networks);
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for each global router, you can:
- connect no more than 50 networks to the router;
- connect no more than 50 subnets to the router;
- create no more than 50 static routes on the router.
To change the limits, create a ticket.
Pricing
The Selectel Global Router is provided free of charge if the aggregate bandwidth of all global routers in the account does not exceed the base bandwidth—no more than 25 Gbps within a region and no more than 1 Gbps between regions.
Increases in bandwidth are billed. The increased bandwidth is allocated to the account and can be distributed among all global routers or used by a specific global router.
You can view prices for increasing the bandwidth between regions on selectel.ru. Prices are indicated for a bandwidth increase of 1 and 5 Gbps between a specific pair of regions for a single global router. Increases within the maximum bandwidth are calculated based on these prices.
For example, if you want to increase bandwidth by 7 Gbps, the cost of the increase will be calculated using the formula: price per 1 Gbps × 2 + price per 5 Gbps.
If an increase in inter-regional bandwidth above the maximum is required, the possibility and price are negotiated individually.
If an increase in intra-regional bandwidth is required, the possibility and price are negotiated individually.