What is the size of SGT data in the metadata header?

An 8-bit SGT would only allow for 256 unique security groups, which is typically insufficient for complex enterprise segmentation needs.

The Security Group Tag (SGT) is a fundamental component of Cisco TrustSec for group-based policy enforcement, and its data field in a metadata header is standardized as a 16-bit value. This 16-bit identifier allows for granular classification of users and devices into security groups.

A 24-bit SGT is not the standard size defined for Security Group Tags in Cisco TrustSec implementations.

A 32-bit SGT is not the standard size defined for Security Group Tags; while it would allow for a vast number of groups, it would also consume more overhead than necessary for its intended purpose.