[j-nsp] DPC or MPC with MX480

[Vladislav A. VASILEV]

Hello Mark,

What kind of MXs do you have this working on? MX80 or on some of the others
in the family?

I am asking because I was told P2MP LSPs were not supported on MX240/480/960
with MPCs.

Also when considering DPCs/MPCs there seems to be no support for IEEE
802.1ah-2008 on MPCs.

Vladislav A. VASILEV

On Tue, Aug 30, 2011 at 16:42, Mark Tinka <mtinka at globaltransit.net> wrote:

> On Friday, August 26, 2011 12:23:14 AM Vladislav A. VASILEV
> wrote:
>
> > I am in process of procuring new hardware and I've got a
> > question. If you were to go for MX480 would you order it
> > with MPCs or DPCs. Also if your network were to have
> > MX80s as well which are Trio based would that influence
> > the decision on choosing either MPCs or DPCs for the
> > MX480s?
>
> 1.  MPC's are likely going to be cheaper, particularly if
>    you're looking at 10Gbps density.
>
> 2.  Juniper have just released EoS/EoL dates for the DPC's.
>    So they might end up cheap on the used market, or just
>    run out if you invest in them too long.
>
> 3.  Mixing-and-matching DPC's and MPC's in the same chassis
>    is simply asking for it.
>
> 4.  The later the code, the better the chance of having
>    MPC's that actually work, but also, the greater the risk
>    of code instability (even though post-10.4 Junos is
>    meant to be better).
>
> 5.  Lots of features already stable on the DPC's may not be
>    ported to the Trio's. You'll have to wait and play
>    Junos-chasing games.
>
> 6.  Note current generation MPC's may be oversubscribed for
>    your various applications. Be sure you have your
>    bandwidth requirements right.
>
> 7.  Some of the more advanced features for certain
>    applications may only be present (current or future) on
>    the MPC's. Check with Juniper to confirm what you need.
>
> 8.  You'll probably be chasing code for a while to fix
>    stability issues while gaining important features with
>    the MPC's.
>
> 9.  You're likely going to end up mixing-and-matching some
>    chassis' in the future if you choose to go with DPC's
>    now, and keep your MX's alive and well for years.
>
> 10. We prefer QoS on the MPC's. Not even the highest end
>    DPC's will do what we want re: QoS.
>
> Hope this helps.
>
> Cheers,
>
> Mark.
>