Cable Forum - View Single Post - VM Business New VM Business service

kev445 · 12-03-2018, 20:02

Let’s assume for a moment that the Virgin Media web-sites are working... From your trace route you provided, they look similar to mine.

My best educated guess is that they have an MTU greater than your PC’s interface, thus for example they are sending your MTU packets of for example 1500... Either your PC or router is then responding to send a smaller packet by PMTUD, however as they are set not to respond to ICMP, they aren’t listening, so they send the same packet size again!

Set the MTU either as 1500 on both your router and PC, or the next largest allowable. I have a hunch that could resolve your issue...

12-03-2018, 20:02	#119
kev445 cf.member Join Date: Oct 2007 Posts: 78	Re: New VM Business service - 350Mb Let’s assume for a moment that the Virgin Media web-sites are working... From your trace route you provided, they look similar to mine. My best educated guess is that they have an MTU greater than your PC’s interface, thus for example they are sending your MTU packets of for example 1500... Either your PC or router is then responding to send a smaller packet by PMTUD, however as they are set not to respond to ICMP, they aren’t listening, so they send the same packet size again! Set the MTU either as 1500 on both your router and PC, or the next largest allowable. I have a hunch that could resolve your issue...