{"id":101325,"date":"2025-02-07T06:50:38","date_gmt":"2025-02-07T12:50:38","guid":{"rendered":"https:\/\/tradingtechstg.wpenginepowered.com\/?post_type=support&p=101325"},"modified":"2025-02-07T06:50:39","modified_gmt":"2025-02-07T12:50:39","slug":"cme-mandatory-migration-to-ilink-3-0-available-in-production-b3-binary-protocol-and-more-6","status":"publish","type":"support","link":"https:\/\/tradingtechnologies.com\/support-updates\/cme-mandatory-migration-to-ilink-3-0-available-in-production-b3-binary-protocol-and-more-6\/","title":{"rendered":"CME: Mandatory Migration to iLink 3.0 – Available in Production, B3: Binary Protocol and more"},"content":{"rendered":"\n\n\n\n\n

<\/span>Critical Updates<\/strong><\/span><\/h3>\n\n\n\n

<\/span>CME: Mandatory Migration to iLink 3.0 – Available in Production<\/strong><\/span><\/h4>\n\n\n\n
March 1<\/strong><\/h5>\n\n\n\n

CME has extended the cutoff date for migrations to iLink 3.0 to March 1, 2025. As a result, TT has extended its deadline to February 17, 2025<\/strong> for all clients to complete their migration to CME iLink 3.0 on the platform. Support for CME iLink 2.0 will end after this date.<\/p>\n\n\n\n

Summary:<\/strong> CME has introduced support for iLink3 on Convenience Gateways (CGW) for trading futures and options on CME Globex. CME will decommission CGW iLink2 on April 6, 2025 however, all customers must migrate by March 1, 2025 to avoid penalties.<\/p>\n\n\n\n

Convenience Gateway Migration from iLink 2.0 to iLink 3.0:<\/strong> Customers familiar with the MSGW iLink3 upgrade that occurred in 2019 will find the CGW iLink upgrade familiar. The steps for migrating are as follows:<\/p>\n\n\n\n

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  1. Coordinate with CME to apply for an iLink3 Convenience Gateway Session.\n
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    1. When applying for a new iLink3 Session, Members should specify TT frontend name \u201cTT CME iLink3 CGW\u201d<\/li>\n<\/ol>\n<\/li>\n\n\n\n
    2. For each iLink Session, create NEW<\/strong> Connections in Setup\n
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      1. Be sure to use a Session ID created by CME specifically for iLink3<\/strong> (see #1 above).<\/li>\n\n\n\n
      2. Be sure to set the Connection Type<\/strong> to \u201cConvenience Gateway iLink3.\u201d<\/li>\n\n\n\n
      3. PLEASE NOTE<\/em>: Modifying an existing connection\u2019s \u201cType\u201d (for example, changing a connection from \u201cConvenience Gateway\u201d to \u201cConvenience Gateway iLink3\u201d is not supported. All customers migrating from iLink2 to iLink3 must create a new connection for iLink3.<\/li>\n<\/ol>\n<\/li>\n\n\n\n
      4. FIX configurations, Order Tag Defaults, etc. will all continue to function with no changes required since the functionality of TT CGW iLink3 is identical to TT MSGW iLink3.<\/li>\n\n\n\n
      5. Throttle Limits\n
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        1. For on-demand order entry, TT recommends that customers set their Connection level Max Order Rate to 250 transactions per second<\/strong> in order to ensure CME iLink session throttle limits are not exceeded.<\/li>\n\n\n\n
        2. This limit will be applied to New Order Single and Change messages, but Cancel messages will not be throttled by TT.\n
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          1. Note: Cancel messages are accounted for in the rolling transaction per second queue, but will not be rejected by TT.<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n\n\n

            Access to Testing:<\/strong> The Convenience Gateway for iLink 3.0 on-demand order entry is available now<\/strong> for testing in UAT. Members who have not yet started verifying iLink 3.0 are strongly encouraged to begin testing as soon as possible.<\/p>\n\n\n\n

            Access to Production:<\/strong> The Convenience Gateway for iLink 3.0 OnDemand order routing is available now<\/strong> for Production trading. Members are welcome to begin migrating as desired. User acceptance testing prior to migration is highly recommended<\/strong>.<\/p>\n\n\n\n

            Please note:<\/strong> GTC orders will not persist when moving from an iLink 2 connection to an iLink 3 connection. TT recommends that, where possible, customers place GTC orders via iLink 3 sessions as they prepare to fully migrate to iLink 3.<\/p>\n\n\n\n

            UPDATE: UAT Support for CME iLink 3.0 Pre-registration<\/strong><\/p>\n\n\n\n

            Support for pre-registration on CME iLink 3.0 is available now<\/strong> in UAT. This version of the TT CME iLink3 Gateway will continue to support \u201cOn Demand\u201d order entry and will also support the CME iLink3 \u201cPre-Registration\u201d order entry type, allowing orders to be submitted to the exchange using a single order message alone.<\/p>\n\n\n\n

            For additional information, please refer to the documentation:<\/p>\n\n\n\n

            https:\/\/library.tradingtechnologies.com\/downloads\/CME_iLink3_Pre_Registration_Order_Entry.pdf<\/a><\/p>\n\n\n\n

            Documentation\/ iLink3 Migration Guide:<\/strong> The TT CME iLink3 Migration Guide is now available at the link below. <\/p>\n\n\n\n

            Pre-Registration vs On-Demand Order Support:<\/strong> At this time, TT support of CME iLink 3.0 is limited to on-demand orders only. However, TT engineers are currently working to complete support for the exchange\u2019s new \u201cpre-registration\u201d order entry method. Details about TT handling of pre-registration, including implementation details, Max Order Rate settings and delivery schedules, are provided in the iLink3 Migration Guide.<\/p>\n\n\n\n

            Further updates regarding timelines, migration, documentation, etc will be shared here in System Admin News & Updates.<\/p>\n\n\n\n

            Additional Resources<\/em><\/p>\n\n\n\n

            Binary Market Data<\/a><\/p>\n\n\n\n

            Binary Order Entry<\/a><\/p>\n\n\n\n

            TT CME iLink3 Migration Guide<\/a><\/p>\n\n\n\n

            NEW – TT CME iLink3: Pre-Registration Order Entry<\/a><\/p>\n\n\n\n

            <\/span>B3: Binary Protocol<\/strong><\/span><\/h4>\n\n\n\n
            Q4<\/strong><\/h5>\n\n\n\n

            B3 has introduced new lower-latency binary protocols for market data via the Unified Market Data Feed (UMDF) and order entry via Simple Binary Encoding (SBE). <\/p>\n\n\n\n

            On March 19, 2024, TT upgraded the B3 binary market data protocol in UAT; the release note can be found here: https:\/\/library.tradingtechnologies.com\/release_notes\/uat-2024-03.html<\/a><\/p>\n\n\n\n

            Please note that on the new binary SBE UMDF market data protocol, B3 does not send Settle and SettlePU prices. B3 plans to address this in Q2, with the solution becoming available to ISVs in Q3. To address this in the new protocol, TT is implementing an interim solution to retrieve Settle and SettlePU from the old protocol at the beginning and end of each trading session. These values will remain constant until the end of the trading session and won\u2019t be updated in real time. Once this feature becomes available via the new protocol, these values will once again be updated in real time.<\/p>\n\n\n\n

            On April 2, 2024, TT deployed the new Binary Order Entry API in UAT. Customers should contact B3 for credentials to be used with the new API. The release note can be found here<\/a>.\u00a0<\/p>\n\n\n\n

            * All clients are strongly encouraged to conduct in UAT and provide feedback.<\/p>\n\n\n\n

            Migration Documentation<\/a>\u00a0<\/p>\n\n\n\n

            Please note that B3 continues to support the legacy protocols in parallel with the new Binary offering and the TT migration will follow a phased approach:<\/p>\n\n\n\n