Sever Buffering

Hello,

I’m experiencing severe packet delay and buffering during real-time streaming, even though speed tests appear normal. I ran MTR tests and confirmed multiple seconds of latency and high jitter inside Comcast’s backbone and Michigan regional network (Flint / Pontiac area).

The issue does not appear on the upstream provider side and only begins once traffic enters Comcast’s network. Here are the affected nodes shown in trace:

• *.comcast.net ibone routers
• arsc1.pontiac.mi.michigan.comcast.net
• xar02.flint.mi.michigan.comcast.net

Symptoms:

• 200–7000ms latency spikes
• high jitter (300–1000ms)
• streaming stalls/ buffering
• issue is noticeable during evenings

This appears to be a congestion or routing issue inside Comcast’s backbone or regional aggregation, not a problem with my local modem or Wi-Fi.

Could you please escalate this to a network engineer to review the Flint/Pontiac MI transport path or open a regional ticket?

Thank you,

Stephanie Popoff
Grand Blanc, Michigan