On Oct 5, 2015, at 1:40 PM, Paul Letta <letta@jlab.org> wrote:

Hello,

I've currently got a FAS3240 HA pair (with each controller in its own chassis).  I am swapping the heads with a FAS8020  HA pair.  This is 7-mode 8.2.x.

With the current 3240's..there are a cluster interconnects that runs between c0a and c0b on both controllers.

They were called cluster interconnects, but more precise to call them HA Interconnect, now that cDOT is all over the place.

The new 8020 is a HA pair in one chassis.   Are cluster interconnects required ?

Nope.  The controllers HA interconnect via back/mid plane, the same as how a non-IOXM 3240A would have have HA paired its two controllers in a single chassis configuration.

The Installation and Setup Instructions guide shows it differently for cDOT and 7-mode..

For cDOT is says to connect e0a to e0a and e0b to e0b for the cluster interconnect.

This is listed as a "switchless cluster" for cDOT. (no mention of 7-mode here)

Cluster Interconnect in cDOT has a different meaning from 7-mode’s HA interconnect.  In cDOT HA interconnect still exists, but serves a differrent purpose (Heartbeat, NVRAM, VTIC, etc.) from the Cluster Interconnect.

For 7-mode and cDot for a "switched HA configuration", it has e0a and e0b for both heads going the upstream switches.

The guide I'm talking about is at:

library.netapp.com/ecm/ecm_download_file/ECMP1199906

Install Hardware (blue 2) step 2.2

I am not planning on using e0a or e0b for networking at all.  The purchase did not come with any cables that will work between these ports.

You can someday use these for 10GbE connectivity.

Thanks.

Paul

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