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jholven
join:2014-04-24
Canada

jholven

Member

[Cable] Strange Tracerouting with New Teksavvy Cable Modem

Not sure this is a problem because everything works. But if anyone could give me some understanding of how this is happening it would be appreciated.

Simple Network Setup
192.168.10.10 -> 192.168.10.1 (router) -> 198.84.213.169 (dhcp assigned to router) -> Internet

But when i do a traceroute to google.ca or us WinMTR
(74.125.226.120), 64 hops max, 40 byte packets
1 192.168.10.1 (192.168.10.1) 0.971 ms 1.100 ms 1.122 ms
2 * * *
3 209.148.242.185 (209.148.242.185) 10.099 ms 12.117 ms 12.003 ms
4 69.63.249.185 (69.63.249.185) 11.546 ms 10.465 ms 8.054 ms
5 ae1_2150-bdr04-tor.teksavvy.com (69.196.136.164) 12.865 ms 11.845 ms 11.705 ms
6 72.14.212.134 (72.14.212.134) 12.655 ms 11.822 ms 11.152 ms
7 216.239.47.114 (216.239.47.114) 12.668 ms 10.803 ms 11.270 ms
8 209.85.250.207 (209.85.250.207) 11.745 ms 12.723 ms 15.992 ms
9 yyz08s13-in-f24.1e100.net (74.125.226.120) 10.688 ms 11.476 ms 12.043 ms

I had assumed HOP 2 was not pingable till it actually ping'd it which should have been the assigned dhcp address 198.84.213.169.

Anyhow like i said .. everything works i can browse the web etc .. just curious have not see this kind of behavior before

oceros37
join:2013-07-20
St Thomas, ON

1 edit

oceros37

Member

i don't see a CMTS hop in there. i'm betting you have 1 router. the network equip/CMTS is hop 2, and its not responding to pings.

you'll see your routers private address, not the public IP, in a traceroute

TypeS
join:2012-12-17
London, ON

TypeS to jholven

Member

to jholven
The second hop would be the IP address assigned on the WAN side but the CMTS gear it hits after it leaves the cable modem, typically 10.*.*.* or 7.*.*.*.

Perhaps Rogers deprioritized or dropped ICMP traffic on that specific CMTS router.