Technical Tip: Slow or failed to load a video in YouTube

• Slow/failed to load a video/YouTube page:

• Debug flow shows that traffic for this source IP address has exceeded the shaper limit and is being dropped:

diagnose debug flow filter saddr 10.80.4.191

diagnose debug console timestamp enable

diagnose debug flow show iprope enable

diagnose debug flow show function-name enable

diagnose debug flow trace start 100

diagnose debug enable

 To stop the debug, run the following commands:

diagnose debug disable
diagnose debug reset

• Additionally, check session list for any possible drops:

diagnose system session filter src x.x.x.x

diagnose system session list

• Further, check on the Traffic Shaper configuration. There is one policy enabled (Shaper-A):

• The shared shaper used shows that the max bandwidth allowed is 20 kbps as shown (20kbps has been used for demonstration purposes of this knowledge article):

There are two options to rectify the issue:

• Option 1: Increase the maximum bandwidth allowed.
• Option 2: Disable traffic shaper.

With option 1:

• Changed the 'Bandwidth unit' to Mbps and increase the 'Maximum bandwidth' allowed (this depends on bandwidth capacity available) as shown:

• The video can load properly:

• No more dropped bytes observed: