CSMS 45950451·Operational·January 28, 2021·View on csms.cbp.gov ↗

Reminder CBP Network Change starting 11pm

Plain-English explanation

CSMS 45950451 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on January 28, 2021. It carries the official CBP guidance brokers and importers must follow for the topic — "Reminder CBP Network Change starting 11pm". CSMS messages are the operational layer between Commerce determinations and at-the-border collections: when Commerce publishes a new rate, scope ruling, or instruction, CBP turns it into a CSMS that ACE/ACS systems and brokers act on.

Message body

Full text as published by U.S. Customs and Border Protection

CSMS #45950451 Reminder-CBP Network Change starting 11pm 1/28/2021 that will Impact some MQ users U.S. Customs and Border Protection sent this bulletin at 01/26/2021 09:43 AM EST Cargo Systems Messaging Service CSMS #45950451 Reminder-CBP Network Change starting 11pm 1/28/2021 that will Impact some MQ users Be advised that starting at 11pm ET on 1/28, a network change will start, completing at 3:00am ET. This will affect any MQ filers connecting through a MPLS or LAN to LAN (L2L) network connection - both MQServer and MQClient. There will be additional work done on 1/26 at 11PM ET ending at 3:00am ET and on 1/27 at 11PM ET ending 3:00am ET. Minor EDI delays of a few minutes may occur 1/26 and 1/27. If Trade network issues are experienced, a "Network Tunnel Crypto reset" should be issued via the following commands before calling CBP Support: Cisco routers clear crypto session remote 216.81.82.123 Cisco 3000 series concentrators Via GUI Administration -> Administer Sessions -> find the session to 216.81.82.123 and click log out If any issues are encountered, please contact the TOC at 703-921-6068. Update your subscriptions, modify your password or e-mail address, or stop subscriptions at any time on your Subscriber Preferences Page . You will need to use your e-mail address to log in. If you have questions or problems with the subscription service, please contact subscriberhelp.govdelivery.com . This service is provided to you at no charge by U.S. Customs and Border Protection . Privacy Policy | GovDelivery is providing this information on behalf of U.S. Department of Homeland Security, and may not use the information for any other purposes. Powered by Privacy Policy | Cookie Statement | Help

Frequently asked questions

What is CSMS 45950451?

CSMS 45950451 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Reminder CBP Network Change starting 11pm". CSMS bulletins are the operational instructions CBP issues to brokers, importers, and ACE filers covering rate changes, system updates, scope guidance, and other day-to-day customs-operations changes.

When was CSMS 45950451 published?

CBP published CSMS 45950451 on January 28, 2021. The bulletin's instructions are typically operative as of the publication date unless the body specifies a different effective date.

Is the CBP CSMS the legally binding instruction?

Yes — for at-the-border filing and entry collection. CSMS messages translate Commerce's Federal Register determinations into operational CBP instructions that ACE/ACS systems and brokers execute. The Federal Register notice is the underlying legal authority; the CSMS is the operational implementation. Both should be read together when reconciling a rate or scope change.

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