To address VPN customer performance issues in the CME ^® New Release and Certification environments, CME is implementing the following changes to the CME Market Data Platform, effective at day’s end June 19 in the Certification environment and at day’s end June 20 in the New Release environment.  These changes may result in configuration changes for customer networks.

ITC 2.1 Channels

The ITC 2.1 format channels on the CME MDP (channels 3, 4, 5 and 6) will each have a new, dedicated multicast address.  These addresses are available online in the Certification Channel Definitions and New Release Channel Definitions documents. 

MO Message Replay Channels Changes

The Instrument Creation (MO (em-oh)) replay channels (channels 1 and 16) will each be assigned a new, dedicated multicast address, enabling customers to join each channel separately via their network configuration.  These channels currently share a multicast address.  

VPN Customer Specifics

CME strongly recommends VPN customers connected to the Certification and/or New Release environments join only one ITC 2.1 channel at a time to avoid exceeding their VPN bandwidth.

RLC production feeds in the Certification environment will be unavailable for VPN customers, as they exceed VPN bandwidth allowances.