Data Delay Protection

Updated: September 11, 2026

Want to summarize with AI?

Data Delay Protection is a MACsec policy feature that rejects MACsec-protected data frames delayed by more than 2 seconds.

Use Data Delay Protection when you need a 2-second delay check in addition to replay-window protection. For typical Layer 2 MACsec deployments, the default replay-protection window is sufficient.

Table 1. Feature History Table
Feature Name	Release Information	Feature Description
Data Delay Protection	Release 26.4.1	Introduced in this release on: Fixed Systems 8200 (ASIC: P200) (select variants only); Modular Systems 8800 (LC ASIC: P200, K100) (select variants only) *This feature is supported on: 8223-64EF-M 8223-64E-M 88-LC2-36EF-M 88-LC1-16H16F-EM 88-LC1-48Y8H-EM

Need help?

Open a support case

(Requires a Cisco Service Contract)

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.