[ILUG] Naive ADSL/WiFi questions (long (sorry!))?

[paul at clubi.ie]

On Mon, 25 Jun 2007, Thomas Bridge wrote:

> Not to mention the fact that in an MPLS core - the ICMP TTL expired
> packet often has to continue down the LSP to reach the remote end
> point before being sent back over the return LSP, mean that the
> "latency" value for all the MPLS hops tends to be pretty identical.

Shudder.

> Bonus geek points for anyone who can tell me why this doesn't apply to
> the second last router in the LSP.

Cause MPLS has some kind of hack whereby the second last can pop the 
label on behalf of the last. Does that always apply though (if it 
does not, as I suspect you meant "need not apply").

MPLS.. shudder.

regards,
-- 
Paul Jakma	paul at clubi.ie	paul at jakma.org	Key ID: 64A2FF6A
Fortune:
Today's scientific question is: What in the world is electricity?

And where does it go after it leaves the toaster?
 		-- Dave Barry, "What is Electricity?"