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Re: 8320 with 10Gb uplink towards 2930M stack, 2930F


@damima wrote: Event with 2xmgmt modules, still SPOF. So being SPOF and also being bit pricey. I don't believe we can push it.

Hi @damima, you have to consider that a single Chassis equipped with dual Management Modules is a SPoF from the chassis standpoint, not from the Management Modules standpoint.

 

To be clear: an Aruba 5400R zl2 equipped with dual Management Modules and NonStop Redundancy configured is not SPoF from the management standpoint, if it is also equipped with two (5406) or up to four (5412) Power Supply Units it can be considererd not SPoF also from the power supply standpoint.

 

So what is the SPoF you fear? it's the failure to the entire chassis! can you overcome that? Yes! Have you ever though about VSF (two Aruba 5400R zl2 working in v3-only-mode interconnected together with VSF links, think about it as Distributed Trunking with steroids)? Will a VSF be a SPoF? No it will not...dual homed system connected to VSF via LACP trunks and consuming services running on VSF are protected against the failure of one entire Chassis. Will it fit your bill? probably yes.

 

I didn't exactly understood what are your requirements but I'm quite sure you can find a suitable approach using HPE Aruba.

 

You named IRF, the same - in terms of being SPoF proof designs - happens on Core designs deployed using IRF technology (various HPE Comware based switch series) or VSX technology (ArubaOS-CX driven switch new series: Aruba 8400X, 8320 and 8325 plus Aruba CX 6400).

 

You wrote you need a redundant Core...this can be achieved in many ways (what level of redudancy are you looking for?) with many different type of hardware and configurations:

 

  • well known ArubaOS-Switch based switch series (pre-rebrand some of them were known as HP ProCurve).
  • new additions running ArubaOS-CX 10 operating systems.
  • DC focused HPE FlexNetwork Switch series running Comware 7.

Quite different approaches are possible. IMHO HPE Aruba knows exactly where it is heading: considering the HPE Hybrid IT model the ArubaOS-CX was designed to be, being a totally new operating system, the present and future foundation for both the Core and Access layers at Campus level...and, lately, with new features added recently it is able to step into Data Center.

Occasional Contributor I

Re: 8320 with 10Gb uplink towards 2930M stack, 2930F

Hi, 

I will to keep reply "readable" :-). 

- "you have to consider that a single Chassis equipped with dual Management Modules is a SPoF from the chassis standpoint, not from the Management Modules standpoint." -->

and chassis backplane went bad. So we decided to stay away from chassis based switches since HPE is not able to provide CTR service at reasonable cost. Small market. 

- "So what is the SPoF you fear? it's the failure to the entire chassis! can you overcome that? Yes! Have you ever though about VSF (two Aruba 5400R zl2 working in v3-only-mode interconnected together with VSF links, think about it as Distributed Trunking with steroids)? Will a VSF be a SPoF? No it will not...dual homed system connected to VSF via LACP trunks and consuming services running on VSF are protected against the failure of one entire Chassis. Will it fit your bill? probably yes." -->

I have considered all of these. I was probably first guy who started doing HP Procurve at that time,  -20y.  Point is cost. You can stack two 5406 with VSF but cost is something which is double comparing to others just because Aruba doesn't have switch most others have :-). 

- "I didn't exactly understood what are your requirements but I'm quite sure you can find a suitable approach using HPE Aruba." -->

It is fairly simple: 2 x 48x10Base-T+8xSFP+ in stack/IRF/whatever and 2 additional stacks with 4x48-port 1GbE PoE+ and 2x24-port 1GbE, few standalone L2 with SFP+ uplinks. You have the edge (2930M, 2930F, 2940) but this stac with this combination of ports, you don't have except using 5710 withour clear picture what will happen to Flex line (or as we call it A series). 

- "IMHO HPE Aruba knows exactly where it is heading" -->
I do beleive Aruba know. Problem is that I don't know :-))))

- "the present and future foundation for both the Core and Access layers at Campus level" -->

yet, you are missing one port combination form small campus core. 

 

Thank you for long reply. Now with all other replies, I am sure Aruba can't match requirements from the customer at cost what makes senses. Time to evaluate some other brands as backup. 

 

 

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