high packet loss in Old Ottawa East

[gweg]

Last night my packet loss was so high I couldn't even post here.

Today, the packet loss is low enough that I can post, but still pretty poor.

This my pinging the default gateway this morning and afternoon"

PING 99.253.156.1 (99.253.156.1) 56(84) bytes of data.
--- 99.253.156.1 ping statistics ---
100 packets transmitted, 98 received, 2% packet loss, time 39715ms
rtt min/avg/max/mdev = 6.471/8.277/27.046/3.160 ms

# ping -q -c 100 -i 0.4 99.253.156.1
PING 99.253.156.1 (99.253.156.1) 56(84) bytes of data.
--- 99.253.156.1 ping statistics ---
100 packets transmitted, 97 received, 3% packet loss, time 39724ms
rtt min/avg/max/mdev = 6.397/8.281/28.330/2.864 ms

Last night it was 10% 😞

Anyone else seeing this?

- Greg

***edited labels***

[gisuck]

Seeing a couple packets dropped isn't unusual for a cable network. Your latency to your gateway is in sufficient range based on the tests you have posted below.

I frequently see small packet loss on my SamKnows report, but they are so low that they are not a concern. I'm typically in video conference calls on Lync or Google Hangouts and I don't notice any impact which is important because there is no such things as retransmits on VoIP calls.

If you are having problems with packet loss, see if you can capture it when you are having a problem and post them here later.

[gweg]

Packet loss still bad this morning.

My SMC gateway is in bridge mode so I attached a computer directly to it and got a second public IP in a different subnet, however, the packet loss is about the same on the alternate IP, pinging that default gateway.

PING 99.240.152.1 (99.240.152.1) 56(84) bytes of data.

--- 99.240.152.1 ping statistics ---
100 packets transmitted, 93 received, 7% packet loss, time 39736ms
rtt min/avg/max/mdev = 6.354/9.338/32.158/4.884 ms

Note that I can ping these gateway addresses from the cloud, and I don't see any packet loss, so the loss is between my SMC gateway and the first-hop router. Would that be a problem with the Rogers CMTS ?

- Greg

[gweg]

Did a litte bit more debugging on this using tcpdump and pinging my computer from the cloud.

It appears that the packet loss is uni-directional, that is, packets from my home are being dropped, not packets from the internet.

[gisuck]

I haven't been paying attention too the rogers infrastructure recently, but I believe they run a split brain where upstream and downstream paths are different.

7 dropped packets is a little more alarming but since your max lag is 33ms and your avg is 9 doesn't seem like its saturation. It's hard to tell what's going on there.