Cisco Webex on O2

Hello @Nunzio Visciano, @ArunBalakrishna, @AugustinB and @dnsroland, welcome or welcome back to our o2 community :-)

I am sorry to hear there are issues using Cisco WebEx from home, thankfully you already provided valuable information with the attached traces to the server.

If the connection to WebEx works, no matter how slow and with how many disconnects that means that within the whole route from your computer to the destinated server every setting is correct. If there were any blocked ports or blacklisted hosts you would not be able to reach the destination in any case at all.

As you can see in the provided trace, up to hop 10 (xe-10-2-1.edge6.London1.Level3.net in London) the traffic flows just fine as it should. At this point the traffic is already out of our network and is transported by a Tier1 provider, Level 3 Communications. 

It is on hop 11 where things start to go south. As soon as the traffic arrives on the East Coast (New York) you see a spike in packet loss and high latency. This continues up to the traffics destination.

I just ran a trace to the destination and still recieve a high latency but the packet loss itself has stopped (except on two gateways that don’t seem to answer to every ping, but that’s okay).

I dug a little deeper and found this information pointing to an outage of Level 3 that affected internet traffic globally to any service that relied on this provider.

I hope that the situation has stabilized and you are able to use your WebEx meetins again from our side there was nothing that we could have done to improve this, luckily it seems to be resolved :-)

Regards,

Lars