Wednesday, 12 July 2017

NetApp AFF A700s and Cluster Port Cabling - Notes

A rare hardware post...

If you want to connect to the AFF A700s using a serial cable, remember the speed is 115200.

Image: A700s needs Serial Line Speed 115200

The onboard 40 GbE ports are (from right to left in the below picture):
e0a+e0e and e0f+e0j

If you’re wondering why it’s not a,b,c,d that’s because e0a and e0f can be configured as 4 x 10GbE ports, which disables the partner port i.e.:
(e0a,e0b,e0c,e0d)+e0e(disabled) and (e0f,e0g,e0h,e0i)+e0j(disabled)

Image: Rear view - AFF A700s Dual Controller Ethernet Only

Image: Key


40 GbE to/from 10 GbE Port Conversion

This needs to be done from maintenance mode. Set the port to 40G / 4*10G using

*> nicadmin convert –m [ 40G | 10G ] [ port ]

Then halt the system, install/change the cable, and reboot for conversion to take effect


Cisco Nexus 3132Q 40GbE Cluster Switches

The supported 40GbE Cluster Switches (Cisco Nexus 3132Q), have two available RCF files depending on your setup:

The ISLs are always ports 31 and 32 (connect 31 to 31 and 32 to 32).

With node ports you can pretty much take your pick from the available ports (unofficial talk), the main rule being that Node X should use the same ports on Switch A as Switch B (Config Advisor will flag if this is not so) - aim for something logical.

Ports for: NX3132 RCF v1.1 - 24 x 10GbE ports and 26 x 40GbE ports
Ports 01 to 06  (6): 4 * 10GbE Node Ports (6 x 4 = 24)
Ports 07 to 30 (24): 40GbE Node Port
Ports 31 to 32  (2): 40GbE ISLs

Ports for: NX3132 RCF v1.1 - 72 x 10GbE ports and 14 x 40GbE ports
Ports 01 to 18 (18): 4 * 10GbE Node Ports (18 x 4 = 72)
Ports 19 to 30 (12): 40GbE Node Port
Ports 31 to 32  (2): 40GbE ISLs


Supported Cluster Connections

There’s 5 different Cluster Configurations for the AFF A700s (information taken from NetApp Hardware Universe) this allows for switchless clusters, switched clusters, and combinations of 40GbE and 10GbE.

Image: Key

Cluster Configuration 1)
2-node Switchless Cluster, 40GbE Cluster Interconnect, and 40GbE Host Connections

Cluster ports are e0a and e0f.

Image: A700s: 2-node Switchless Cluster, 40GbE Cluster Interconnect, and 40GbE Host Connections

Cluster Configuration 2)
2-node Switchless Cluster, 40GbE Cluster Interconnect, and 10GbE Host Connections

Cluster ports are e0a and e0e.

Image: A700s: 2-node Switchless Cluster, 40GbE Cluster Interconnect, and 10GbE Host Connections

Cluster Configuration 3)
Switched 40GbE Interconnect, 40 GbE Host

Cluster ports are e0a (Switch A) and e0f (Switch B).

Image: A700s: Switched 40GbE Interconnect, 40 GbE Host

Cluster Configuration 4)
Switched 40GbE Interconnect, 10 GbE Host

Cluster ports are e0a (Switch A) and e0e (Switch B).

Image: A700s: Switched 40GbE Interconnect, 10 GbE Host

Cluster Configuration 5)
Switched 10GbE Interconnect (breakout cabling), 10 GbE Host

Cluster ports are e0a,e0b (Switch A) and e0f,e0g (Switch B)

Image: A700s: Switched 10GbE Interconnect, 10 GbE Host

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