IS-IS Traffic Engineering Extensions For Microburst

This document defines a new IS-IS sub-TLV to advertise microburst- related statistics on links, serving as a supplement to RFC 8570(IS- IS Traffic Engineering (TE) Metric Extensions). RFC 8570 specifies steady-state TE performance metrics (e.g., latency, jitter, packet loss) but does not cover microburst-related information, which this document intends to address. Microbursts are short-duration, high- intensity traffic bursts that can cause transient congestion, increased latency, jitter, and packet loss, which are critical issues for latency-sensitive services. The proposed sub-TLV carries aggregated microburst statistics on a per-traffic-class basis, including total burst count, burst-induced drop metrics, and a configurable measurement interval, along with an Anomalous (A) bit to indicate abnormal microburst conditions. This extension enhances IS- IS Traffic Engineering capabilities by advertising link microburst statistics,enabling improved traffic engineering and path selection decisions for traffic.