2000-11-30 23:02:25

by Rajeev Bector

Subject: using TOS as a key in route cache

Guys
I am looking for a reason as to why we want
to have different route cache entries for
different IP ToS types. Does anyone have
any insight into this ?

thanks

-- Rajeev

(please cc replies to [email protected])

2000-12-04 11:13:23

by Helge Hafting

Subject: Re: using TOS as a key in route cache

Rajeev Bector wrote:
>
> Guys
> I am looking for a reason as to why we want
> to have different route cache entries for
> different IP ToS types. Does anyone have
> any insight into this ?

Because you may want to route time-critical stuff like
video through a dedicated fast network and slow stuff like email
through another. Such a setup prevents an email burst from
disrupting video.

There are many similiar uses.

Helge Hafting

2000-12-04 18:49:40

by Rajeev Bector

Subject: Re: using TOS as a key in route cache

Hello
Thanks for your reply. But this can create problems
in some of the cases. For example, "scp" over TCP
starts with TOS 0, then goes to 8 (bulk data). What
happens is that when RTOs are cached, they are
updated for TOS 8 and not for TOS 0, therefore a
new connection does not pick up the cached RTO.

Does this make sense ?

Thanks,
-- Rajeev
(Again, please cc replies to [email protected])

On Mon, 4 Dec 2000, Helge Hafting wrote:

> Rajeev Bector wrote:
> >
> > Guys
> > I am looking for a reason as to why we want
> > to have different route cache entries for
> > different IP ToS types. Does anyone have
> > any insight into this ?
>
> Because you may want to route time-critical stuff like
> video through a dedicated fast network and slow stuff like email
> through another. Such a setup prevents an email burst from
> disrupting video.
>
> There are many similiar uses.
>
> Helge Hafting
>