Effective with the business of October 22^nd, the production IP address for firm�s MQM IP sender channel changes from 155.155.210.233 to 198.212.155.249. For the test environment (MVSB), you already are connecting to 198.212.155.241. All firms that use MQM IP (only) and those few firms (and Exchanges) that connect directly to the CME mainframe for FTP services (versus the FTP server) must successfully complete a machine-to-machine ping test to the new IP address between October 15-19th. If you need the CME to verify or assist you with the test, our preferred testing hours are Mon-Fri between 8:00 -11:00 a.m. CST. However, other times can be arranged. This will not affect firms that connect to MQM via APPN (SNA)! MQM software is used for trade submission and confirmation, including GLOBEX transaction confirmations.

On Sunday, October 21^st, between 8:00-10:00 am CST, firms should access their MQM sender channel to the CME and change the IP address from 155.155.210.233 to 198.212.155.249. Do not make this change before October 21^st. This is a 100% MQM IP address conversion. If you fail to complete this change, you will not be able to access MQM in production on Monday morning, October 22^nd. This means you will not be able to transmit trades to the CME! The 155.155.210.233 will no longer be accessible for MQM IP. The 155.155.210.233 address will continue to work for FTP.

Because many member firms network and systems staff are not regular recipients of our e-mails, PLEASE pass this memo along to any and all related systems and network staff within your firm. They can determine what work is required to make this IP address change, as it applies to your system.

To arrange assistance with testing, or if you have questions, please call or e-mail Karen F. McCoy at (312) 930-4524 - kmccoy@cme.com. Thank you.