[60834] in North American Network Operators' Group
Re: MPLS ICMP Extensions
daemon@ATHENA.MIT.EDU (Jesper Skriver)
Sun Aug 17 18:27:13 2003
Date: Mon, 18 Aug 2003 00:26:34 +0200
From: Jesper Skriver <jesper@skriver.dk>
To: nanog@merit.edu
Mail-Followup-To: Jesper Skriver <jesper@skriver.dk>, nanog@merit.edu
In-Reply-To: <20030814174001.GA54946@ussenterprise.ufp.org>
Errors-To: owner-nanog-outgoing@merit.edu
On Thu, Aug 14, 2003 at 01:40:01PM -0400, Leo Bicknell wrote:
>
> I wanted to get some other opinions on some new features that have
> appeared in recent code from the popular vendors. It appears there
> is a new draft, a copy of which can be found at
> http://www.watersprings.org/links/mlr/id/draft-ietf-mpls-icmp-01.txt that
> allows MPLS enabled boxes to return some additonal information in
> a traceroute packet.
>
> That's all well and good, and I can see how that might be amazingly
> useful to someone running an MPLS network, however, it seems to
> expose data much further than the local network. Here's a random
> example from a traceroute I recently performed (on a Juniper):
>
> traceroute wcg.net
> [snip]
> 11 hrndva1wcx3-oc48.wcg.net (64.200.95.117) 91.935 ms 102.652 ms 92.960 ms
> MPLS Label=13198 CoS=0 TTL=1 S=1
> 12 hrndva1wcx2-oc48.wcg.net (64.200.95.77) 92.593 ms 92.785 ms 93.119 ms
> MPLS Label=12676 CoS=0 TTL=1 S=1
> 13 nycmny2wcx2-oc48.wcg.net (64.200.240.45) 93.273 ms 93.121 ms 93.067 ms
> MPLS Label=12632 CoS=0 TTL=1 S=1
> 14 nycmny2wcx3-oc48.wcg.net (64.200.87.78) 104.755 ms 91.949 ms 92.169 ms
> MPLS Label=12672 CoS=0 TTL=1 S=1
> 15 chcgil1wcx3-oc48.wcg.net (64.200.240.37) 92.021 ms 91.737 ms 91.684 ms
> MPLS Label=12592 CoS=0 TTL=1 S=1
> 16 chcgil1wcx3-pos5-0.wcg.net (64.200.210.114) 175.907 ms 278.144 ms 203.763 ms
> MPLS Label=12695 CoS=0 TTL=1 S=1
> 17 chcgil1wcx2-oc48.wcg.net (64.200.103.73) 93.286 ms 93.230 ms 93.593 ms
> MPLS Label=13506 CoS=0 TTL=1 S=1
> 18 stlsmo3wcf1-atm.wcg.net (64.200.210.158) 92.780 ms 92.344 ms 92.596 ms
If anyone is interested I have a patch for LBL traceroute to display
this information too.
Download ftp://ftp.ee.lbl.gov/traceroute.tar.gz, patch in
http://e.wheel.dk/~jesper/traceroute.diff, and you will have
jesper@tam:/home/jesper> traceroute wcg.net
traceroute to wcg.net (64.200.241.26), 30 hops max, 40 byte packets
1 217.79.98.25.adsl.griffin.net.uk (217.79.98.25) 0.895 ms 0.836 ms 0.751 ms
2 217.79.96.209 (217.79.96.209) 21.557 ms 18.431 ms 19.075 ms
3 f0-0.core1.tchx.lon.uk.griffin.com (217.79.96.1) 19.768 ms 19.094 ms 19.285 ms
4 lndnuk1icx1.wcg.net (195.66.224.105) 18.824 ms 20.206 ms 19.800 ms
5 nycmny2wcx2-pos15-3.wcg.net (64.200.87.61) 126.360 ms 127.665 ms 127.702 ms
MPLS Label=12632 CoS=0 TTL=1 S=1
6 nycmny2wcx3-oc48.wcg.net (64.200.87.74) 125.205 ms 126.923 ms 125.993 ms
MPLS Label=12672 CoS=0 TTL=1 S=1
7 chcgil1wcx3-oc48.wcg.net (64.200.240.37) 126.425 ms 126.212 ms 126.220 ms
MPLS Label=12592 CoS=0 TTL=1 S=1
8 brvwil1wcxa-pos9-0.wcg.net (64.200.103.193) 126.920 ms 127.660 ms 127.462 ms
MPLS Label=12604 CoS=0 TTL=1 S=1
9 64.200.236.14 (64.200.236.14) 129.886 ms 125.499 ms 126.715 ms
MPLS Label=13506 CoS=0 TTL=1 S=1
10 stlsmo3wcf1-atm.wcg.net (64.200.210.158) 126.080 ms 124.598 ms 125.235 ms
11 stl-clust01.wcg.net (64.200.241.26) 126.723 ms 124.544 ms 124.736 ms
/Jesper
--
Jesper Skriver, jesper(at)skriver(dot)dk - CCIE #5456
One Unix to rule them all, One Resolver to find them,
One IP to bring them all and in the zone to bind them.
