Routing Loop Strangeness

Mailman List Mirror (Read Only)
1

Anyone else see this from their paths?

vader# whois -h whois.cymru.com " -v 11.11.11.2"
AS | IP | BGP Prefix | CC | Registry | Allocated | AS Name
NA | 11.11.11.2 | NA | US | arin | 1984-01-19 | NA

#trace

Protocol [ip]:

Target IP address: 66.80.187.122

Source address:

Numeric display [n]: y

1 68.250.30.166 0 msec

2 68.250.30.131 0 msec

3 66.73.28.129 4 msec

4 65.43.25.116 4 msec

5 151.164.93.93 12 msec

6 151.164.43.195 16 msec

7 151.164.42.168 52 msec

8 151.164.191.174 16 msec

9 151.164.42.141 16 msec

10 4.68.110.197 20 msec

11 4.68.101.1 20 msec

12 209.247.8.65 28 msec

13 209.247.9.254 44 msec

14 4.78.164.11 28 msec

15 169.130.98.227 188 msec

16 199.72.43.250 52 msec

17 11.11.11.2 40 msec

18 11.11.11.1 40 msec

19 11.11.11.2 44 msec

20 11.11.11.1 40 msec

21 11.11.11.2 44 msec

22 11.11.11.1 40 msec

23 11.11.11.2 48 msec

24 11.11.11.1 44 msec

25 11.11.11.2 44 msec

26 11.11.11.1 48 msec

27 11.11.11.2 48 msec

28 11.11.11.1 48 msec

2

Elijah Savage wrote (on Thu, Jan 04, 2007 at 03:28:13PM -0500):

Anyone else see this from their paths?

vader# whois -h whois.cymru.com " -v 11.11.11.2"
AS | IP | BGP Prefix | CC | Registry | Allocated | AS Name
NA | 11.11.11.2 | NA | US | arin | 1984-01-19 | NA

#trace
Protocol [ip]:
Target IP address: 66.80.187.122
Source address:
Numeric display [n]: y
17 11.11.11.2 40 msec
18 11.11.11.1 40 msec
19 11.11.11.2 44 msec
20 11.11.11.1 40 msec
21 11.11.11.2 44 msec
22 11.11.11.1 40 msec
23 11.11.11.2 48 msec
24 11.11.11.1 44 msec
25 11.11.11.2 44 msec
26 11.11.11.1 48 msec
27 11.11.11.2 48 msec
28 11.11.11.1 48 msec

Yep. Way cool.

3

Unfortunately it's not the first time that:
1) someone with enable screwed up a routing design or did something dumb like dueling static routes, or some similar kind of rubbish.
2) someone with enable (or someone who manages peple with enable) co-opted arbitrary non-1918 IP space for use on their internal network. Calling it RFC1919 space would almost be funny if it weren't such a pain the butt to deal with people who do things like this.

jms