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CME GLink is a customer-managed connectivity solution providing access to the CME Globex platform along with access to CME Clearing production environments from within the CME Co-Location facility. Customers using GLink are required to license space at the CME Group Co-Location facility and the GLink connection must terminate in the Customer’s Licensed Space within the data center. GLink may not be terminated to a carrier or other transport offering.

See Also:

This option is not available to exchanges other than Participating Exchanges.

10 Gig

  • 10 Gbps hand-off
  • Single-mode fiber
  • 10GBase-LR long-wavelength/long haul

CME GLink connectivity provides access to:

  • CME Globex Platform, which includes:
    • CME Market Data Platform
    • CME iLink® order routing interface
  • CME Clearing House Systems


  • All connections at the facility are single-mode fiber.
  • A and B feeds are sourced from the same data center. In the event of a failure of both feeds, the B feed will be available from an alternate data center.

For GLink connectivity, customers must meet the following requirements:

  • At a minimum the customer must support Layer 3 protocols. It is recommended that the customer facilitate the termination of each GLink cross-connect in a redundant configuration.

    To preserve infrastructure integrity, CME Group will close the port for a device not conforming to protocol specifications.
  • GLINK termination must be on customer equipment inside a CME Licensed Space
  • Customers must be able to terminate 1310nm 10Gbps Ethernet (10G-LR) via a transceiver or fixed port in their equipment
  • Customer equipment must support the following protocols:  Ethernet, IP, BGP, and PIM Sparse Mode
  • Customer IP packets must be sourced from the IP range assigned by CME Group
    • Do not use media converters
    • Terminate the GLINK on a L3 switch
    • Put IP address of point-to-point network provided by CME on interface terminating GLINK
  • Customer routers must be capable of using advanced TCP/IP Protocols including BGP and multicast, specifically PIM Sparse Mode.
  • BGP routing must be used on the routers terminating CME Group connections.
  • It is recommended that customers use a routing protocol between their routers to provide automatic failover.
  • All IP packets destined for CME Group must be sourced from CME Group-assigned private address space.
  • Multicast PIM Sparse Mode must be used.
  • Customers have the ability to advertise more specific routes on the GLink connections to allow for routing failover and fault tolerance.

The following restrictions apply to GLink connectivity:

  • No site-to-site connectivity.
  • CME Group will not accept traffic sourced from any customer’s public IP space.
  • Only one Market Data Platform data feed per router is allowed.
  • Customer hardware must be capable of supporting quote streams (e.g., PIM sparse mode).
  • Customer equipment must be in CME Group-approved space

Use the following procedure to establish connectivity:


  1. Customer licenses space at CME Group’s Co-Location facility.
  2. Customer orders GLink connection completing the required paperwork.
  3. CME Globex Services schedules a network connectivity test. Customer must have a knowledgeable contact on site during for the GLink turn up.
  4. Testing will be scheduled for a specific weekday after 4:30 pm Central Time.
  5. Upon successful test, CME Group notifies customer of completion and billing commences.