AT&T/L3 interconnect?
Richard A Steenbergen
ras at e-gerbil.net
Mon Oct 11 19:55:52 UTC 2010
On Mon, Oct 11, 2010 at 02:48:00PM -0400, Deepak Jain wrote:
>
> > http://www.nanog.org/meetings/nanog45/presentations/Sunday/RAS_traceroute_N45.pdf
>
> I'd have thought I didn't need to provide credentials in NANOG, but
> apparently one stays quiet too long and you're a noob.
>
> First, to those who have given me basic mpls, traceroute and ip primers
> by off list email, thank you. It's not necessary. I appreciate your
> willingness to help out the community.
>
> Second, I *know* that the traceroute I pasted a bit of has to do with
> mpls magic (or similar). That's why I used the word tunnel. I wasn't
> asking *how* it was done. I'm quiet capable of performing the same
> magic. I just wanted to know if anyone off the top of their head knew
> *where* the packets were magically popping back into the ether... LA,
> Nevada, Denver. That's all. A physical location or a router IP would
> have been a perfectly wonderful answer.
Hey Deepak,
Sorry, but they're actually right. Read the section on icmp tunneling,
it explains exactly how and why you're seeing this behavior. :)
The return packets pop our at the end of the lsp, which is clearly
in LA (or thereabouts, whatever lsrca is probably).
--
Richard A Steenbergen <ras at e-gerbil.net> http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
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