[j-nsp] ME design from JNPR

[David Ball]

  I'm not famil with the E-series, but to my knowledge, full ISSU
support isn't 'officially' available in any product lines.  I believe
T-series and M320 have 'some' ISSU support (hidden commands) as of
8.5, but as it's not mentioned in any Release Notes, I imagine they're
still working out some kinks.
  If you're really concerned about ISSU, you should pose 'very'
pointed/detailed questions to your account team, and perhaps even have
them mock it up and prove it.  Our sales rep impressed upon our buyers
that our T640s would have hitless ISSU (in so many words), but they in
fact do not (until 8.5, apparently).

David


On 20/11/2007, Alex Lemk <alxlemk at gmail.com> wrote:
> Hi,
>
> Our company is going to deploy ME  network for providing broadband
> services for residential customers.  JNPR proposes the design with few
> MX480 used as a core and E120 as a  BRASes.  This model looks like a
> BRAS centric, because all customer ME rings will be connected to E120
> and all traffic (including VoD,Multicast and Business) will flow
> through the BRASes also.
>
> During the design analyze I found  few possible issues, which were not
> highlighted by JNPR:
>
> - All customers are connected to four E120. There are not topology
> redundancy, i.e. each ME access ring connected only to single E120. If
> this E120 fails, then all connected customers will lost their
> services. JNPR claims that they know how to make topology redundancy
> with addinf second BRAS, but couldn't explain how to provision it :)
> Has anybody seen such configuration before?
>
> - Another question is ISSU support. JNPR claims again, that their
> BRASes have a support of this feature, but I didn't find any mentions
> about ISSU in JunOS documentation. Is it true ? Is it full ISSU with
> upgrades between major releases ?
>
> - Is there another well known weaks of such design ?
>
> - I didn't find  public reports about MX480 and E120. Can somebody
> unicast me about his experience with these boxes ?
>
> ====
> Alex
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