Router missing in traceroute

dog · Tue Feb 16, 2010 6:57 pm

Hi,

I have a pretty simple problem (I guess

)
Doing a traceroute to one of my IPs I get:

traceroute to 9.xxx.xxx.2 (9.xxx.xxx.2), 64 hops max, 72 byte packets
[...]
 7  ac.provider (6.xxx.xxx.1)  62.172 ms  64.967 ms  59.974 ms
 8  9.xxx.xxx.2 (9.xxx.xxx.2)  173.959 ms  117.509 ms  145.809 ms

My problem is there is a router between 7 and 8 that is not appearing.
This router is connected to the internet via PPPoE and has hop 8 on it's "inside".
So I expected to either see (6.xxx.xxx.50 PPPoE assigned IP) or (9.xxx.xxx.1 IP for inside network) in the traceroute output?

Best regards

Max

Chupaka · Wed Feb 17, 2010 12:36 pm

seems like somebody on that router is playing with ttl =)

dog · Wed Feb 17, 2010 12:57 pm

I'll ask the RouterOS gnomes because I didn't play with the ttl

Chupaka · Wed Feb 17, 2010 1:05 pm

huh, not on that router, but on 7th hop then =)

what do you see when doing tracerout in opposite direction?

dog · Wed Feb 17, 2010 1:23 pm

traceroute to remote.endpoint (8.xxx.xxx.1), 30 hops max, 40 byte packets
 1  router (9.xxx.xxx.1)  0.463 ms  1.036 ms  1.004 ms
 2  ac.provider (6.xxx.xxx.1)  16.176 ms  18.056 ms  18.675 ms
[...]

This is as expected.

Router missing in traceroute

Router missing in traceroute

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