From: Alan Halachmi (alan@halachmi.net)
Date: Sat Dec 27 2003 - 19:31:40 GMT-3
All,
I was just messing around with the route-views
(http://www.routeviews.org) looking glasses and noticed something that I'm
curious about. When I ran a traceroute through the Cisco router, I got the
standard output along with ASN. When I ran the traceroute through the
Juniper router (route-views3), I didn't get the ASN, but I did get MPLS
information:
...
9 sl-bb22-ana-14-0.sprintlink.net (144.232.1.177) 26.002 ms 26.122 ms
26.521 ms
10 144.232.9.238 (144.232.9.238) 29.814 ms 29.678 ms 29.693 ms
11 bur-core-01.inet.qwest.net (205.171.13.9) 29.992 ms 30.134 ms 30.034
ms
12 iah-core-02.inet.qwest.net (205.171.205.26) 59.792 ms 59.254 ms
59.236 ms
MPLS Label=350709 CoS=0 TTL=1 S=1
13 dal-core-01.inet.qwest.net (205.171.8.125) 59.109 ms 59.222 ms
59.672 ms
MPLS Label=180354 CoS=0 TTL=1 S=1
14 dal-core-02.inet.qwest.net (205.171.25.130) 58.988 ms 58.929 ms
58.855 ms
15 dal-edge-11.inet.qwest.net (205.171.25.150) 59.560 ms 58.941 ms
58.649 ms
...
So... I have two questions as a result:
1) Is this information coming from ICMP? I recall reading somewhere about
two or three years back that there was some discussion of how to convey
tagging information in ICMP.
2) If so, are any of the current IOS versions able to display the
information as part of a trace?
Best,
Alan
This archive was generated by hypermail 2.1.4 : Sat Jan 03 2004 - 08:25:45 GMT-3