Re: v6 subnet size for DSL & leased line customers

 >> As to "there must be better knobs" I
think it may be a little late 
for that; by design (or as a consequence of it) the set of
IPv6 knobs is 
the same as the set of IPv4 knobs.
 > The trouble is that BGP doesn't have a meaningful
inter-AS metric. 
(Although there is something that is called that.) If I want
to increase 
my path length by 10% through a certain neighboring AS, I
don't get to 
do that. I only get to double or triple it. (Unless I was
doing very 
heavy prepending to begin with.)

Actually, while it isn't a true metric as such, there *is*
just such a knob.

The "origin" attribute, can act as a fractional
AS-path-length. It's 
mandatory and transitive.
It gets evaluated after as path length, but before other
attributes.

It has three possible values (internal, external, unknown),
and as such, 
gives the limited ability to influence path choice at
third-party 
locations quite distant.

The only caveat is, that some parties may mess with it on
prefixes they 
receive.

I've used it in the past, with considerable success.

Brian Dickson

Here's a suggestion - perhaps it should go to nanog-futures,
not sure...

Since newbies have to first subscribe before they can
post...

Why not have the subscription procedure include sending the
newbie
a link to a page with newbie-related material,
much like the nanog page on tools and resources,
or perhaps a wiki (so that other list members can update
it,
to minimize the impact to their mailing-list joy that
newbies
appear to cause)?

Brian

I am not sure why this is an issue. Someone asked a question
about 
multihoming and the way I see it if you don't want to
respond to it or 
don't want to read it than don't. Why does this have to be a
major 
issue. I read what I want and respond to what I want. I
think the rest 
of the community can do the same.

I like the idea of a wiki is a great idea but who really
wants to 
maintain it or update it? Anyways I see nothing wrong in
someone asking 
for help in NANOG. I would think that anyone who wanted to
help would 
just respond offline or on the list and give it, if you are
not someone 
that wants to help then just ignore it, not really that
hard.

I see more BS conversations about nothing than the one about
someone 
asking for multihoming.

On a side note, cause someone does not multihome does not
make them a 
newbie.

Flame on....

Keith
Pando Networks


Brian Dickson wrote:
>
> Here's a suggestion - perhaps it should go to
nanog-futures, not sure...
>
> Since newbies have to first subscribe before they can
post...
>
> Why not have the subscription procedure include sending
the newbie
> a link to a page with newbie-related material,
> much like the nanog page on tools and resources,
> or perhaps a wiki (so that other list members can
update it,
> to minimize the impact to their mailing-list joy that
newbies
> appear to cause)?
>
> Brian
>
>

On Sat, Mar 22, 2008 at 8:27 PM, Keith O'Neill <keithpando.com> wrote:
>
>  I am not sure why this is an issue. Someone asked a
question about
>  multihoming and the way I see it if you don't want to
respond to it or
>  don't want to read it than don't. Why does this have
to be a major
>  issue. I read what I want and respond to what I want.
I think the rest
>  of the community can do the same.

I completely agree.   As mostly a reader of NANOG, I would
rather read
70+ responses to multihoming best practices based on decades
of
experience from some of the most respected senior network
engineers to
date.  Sadly what we get is 70+ responses, from some of the
most
respected senior network engineers to date,  debating what
is and
isn't a good question or what isn't or isn't a good place to
ask a
question.  :-(

-Jim P.