adgwytc's profile - activity

I have configured PE Router with MSS of 1410 and am testing. Some websites are loading fine and some are not. As a relevant test site to show th4e data with, I chose www.bbc.co.uk

The issue with the website is that the Writing appears immediately, as it should, but then I wait for 15 - 20 seconds for all images to appear at the same time. On other websites this can be even slower (even with basic connection). To make it clearer, the websites have also been tested when cached, with the same problem.

Here is the initial SYN - SYN/ACK agreement for the MSS:

   6    2.382020    192.168.1.11    212.58.244.70   TCP 66  50783 → 443 [SYN] Seq=0 Win=65535 Len=0 MSS=1460 WS=8 SACK_PERM=1
  54    2.420046    212.58.244.70   192.168.1.11    TCP 58  443 → 50783 [SYN, ACK] Seq=0 Ack=1 Win=0 Len=0 MSS=1410

This shows in the SYN/ACK the MSS of 1410, which is fantastic. Exactly as configured. From my understanding this is a one time negotiation and this MSS should be used throughout the rest of the connection communication.

So, why is it that the text appears immediately, but I am having to always wait for the images?

Has anyone seen this before?

Okay. I have narrowed it down. I turned off IPv6 on the CPE and everything worked perfectly. So, it is definitely an IPv

Thank you for the answer. Strangely, I now have IPv6 working and can ping and traceroute through the CPE to the IPv6 ad

Yes, the routers that I have configured are for dual stack and we are advertsing and receiving IPv6 via BGP. Why would

Yes, the routers that I have configured are for dual stack. Why would that cause an issue with the IPv4 though and the

Try again. I pretty sure it is now public :)

Try this: https://www.cloudshark.org/captures/b80b73ffc201 ip.addr==212.58.244.70 as the filter for the website address

I can't load a PCAP as I apparently don't have enough points.

Possible MSS Issue I have configured PE Router with MSS of 1410 and am testing. Some websites are loading fine and some