[j-nsp] Stripping off BGP Prepends

[Richard A Steenbergen]

On Wed, Jun 30, 2010 at 04:37:55PM -0700, Tony Li wrote:
> 
> On Jun 30, 2010, at 12:17 AM, Richard A Steenbergen wrote:
> 
> > There is absolutely no way to implement anything like this in JUNOS, not 
> > even with hidden commands, despite about 10 years of asking for a secret 
> > way to manipulate the as-path.
> 
> Arbitrary manipulations of the AS path would break BGP's loop 
> avoidance mechanism, resulting in an Internet full of forwarding 
> loops.

No, arbitary manipulation of the AS path COULD break bgp's loop 
detection mechanism, if used incorrectly (but so could a lot of things). 
That's why I said make it hidden, so the average idiot won't come along 
and screw themselves. Unfortunately there are some times when you just 
NEED to do it, and running things through a custom BGP implementation 
isn't always easy when you can't do ebgp-multihop for political reasons.

Note that I don't consider the OP's situation to be a legitimate 
application for it, I want it for my own reasons. :)

-- 
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)