Hi!
"My boss wants me to stack 2 aruba cx 8320s in our data center. They're only used as access switches, not core switches."
You can't "stack" two Aruba 8320. You can "cluster" them. See above to understand "stacking" versus "clustering" differences, restrictions and requirements.
VSX -> Clustering only two Switches (supported only by Aruba Aruba 6400, 8100, 8320, 8325, 8400, 8360, 9300, 10000).
VSF -> Stacking two or more Switches (supported only by Aruba 6200F, Aruba 6300M, Aruba 6300F)
VSX was not engineered to be used - as a feature - on the Access Layer, it was engineered to be used - as a feature - on the Core Layer (where Core network services effectively run).
VSF was engineered to be used - as a feature - on the Access Layer.
"I started reading about VRF only to realize a bit down the road that the CX 8320s will not do VRF, only VSX. I started reading the 230 page document on VSX, and I haven't come across the scenario that I'm in and what I'm trying to get accomplished. It's all being core switches that then connect to the access switches. Is there any easy way (like VRF was) to accomplish what I'm trying to do, stack 2 8320 into one logical switch?"
What do you mean with VRF? are you referring to something Cisco related? I ask that because VRF - in Aruba's jargon/dictionary - has a very specific meaning: Virtual Routing and Forwarding and it is a feature provided by ArubaOS-CX operating systems.
If you mistakenly wrote VRF but it was instead VSF...see above (VSF is not VSX and VSX is not VSF).
If your boss purchased you two Aruba 8320, those must (or should) be intended to be used and deployed at Core Level, not at Access Level. If then you are forced by your boss to use it on the Access Layer you have to stick with its intended engineered features/requirements/restrictions (you can't be surprised if a Sport Car performs badly when used in a dirty desert track...maybe it runs fast but it will not last longer...I mean: every type of device has its field of use).
Original Message:
Sent: Dec 19, 2023 02:39 PM
From: jarmustang
Subject: Why is VSX considered stacking
I'm still a little confused. My boss wants me to stack 2 aruba cx 8320s in our data center. They're only used as access switches, not core switches. I started reading about VRF only to realize a bit down the road that the CX 8320s will not do VRF, only VSX. I started reading the 230 page document on VSX, and I haven't come across the scenario that I'm in and what I'm trying to get accomplished. It's all being core switches that then connect to the access switches. Is there any easy way (like VRF was) to accomplish what I'm trying to do, stack 2 8320 into one logical switch?
Original Message:
Sent: Jan 17, 2023 03:50 PM
From: ProbeRequest
Subject: Why is VSX considered stacking
You are using two separate switches...
But they're paired together so that you can benefit from things like multi-chassis LAG which you cannot do with two distinct switches that do not operate together. You get greater redundancy, this way, without having to use some sort of anti-loop protection (such as Spanning Tree) which would result in the multiple uplinks having one active connection and one blocked or standby connection. With VSX all links can remain active without creating a loop.
With VSF, one switch is controlling configuration and various functions. If that switch fails, another switch must take over the job. In theory there is some downtime (short) of functionality during this hand-off. With VSX both switches are fully operational and can even hold unique configuration to one another, but they can also have configuration synchronised. Both switches operate all functions and can simultaneously operate from a virtual MAC address(es) so that protocols like VRRP are not required. It is highly resilient.
VSX is more suited to scenarios where high resilience downstream/upstream connectivity is required. Such as at the aggregation or core layers of the network. VSF can be suitable in the access layer where downstream devices usually only have a single uplink to a switch.
Youtube: VSX Technology Overview
Youtube: Aruba VSF vs VSX & Configuration Guide
Maybe read through some of early the chapters in this guide:
Aruba AOS-CX 10.11 Virtual Switching Extension (VSX) Guide
Benefits of VSX, VSX solution topology overview, and VSF versus VSX might be a good start.
Original Message:
Sent: Jan 17, 2023 04:11 AM
From: businessuser
Subject: Why is VSX considered stacking
That is what I dont understand about clustering.
If there are 2 separate ip addresses configured on 2 separate equipment, why dont I use 2 separate switches instead?
Why use clustering then?
So aruba switches that can do vsx cannot do vsf, and those that do vsf cannot do vsx?
Original Message:
Sent: Jan 15, 2023 05:13 AM
From: ariyap
Subject: Why is VSX considered stacking
you should note that VSX is not a stacking feature like VSF.
VSX is designed to provide HA for deployment of multi-chassis link redundancy while maintaining separate control planes.
This is in contrast to VSF, which is designed to simplify deployment of multiple physical devices by offering a single point of configuration and mgmt that uses shared control plane across the entire stack.
each of them have their own advantages.
VSX's ability to have two control plane while using "sync" for configuration of the switches to be the same, is a big plus point. This means that you can upgrade without impacting having to take both switches down, thats why VSX supports live upgrade in which you can upgrade the pair of VSX switches without any down time (Assuming all the other switches/servers are dual connected). This is not possible in a solution where you have one control plane between multiple switches. Then you have a number of related features like Active gateway (just to mention one) that is much better/faster/less complicated that VRRP which further enhances Link and IP default gateways redundancy across two VSX switches.
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Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
Original Message:
Sent: Jan 15, 2023 04:47 AM
From: businessuser
Subject: Why is VSX considered stacking
In that case what is the advantage of using VSX vs VSF?
Original Message:
Sent: Jan 10, 2023 07:44 PM
From: ProbeRequest
Subject: Why is VSX considered stacking
VSX pairs two switches. Some of the functions of of the pair operate much like you would expect from a traditional stack, however the control plane is distributed which makes the pair more resilient (like a cluster, if you like).
Despite the options of reference, VSX is awesome.
Original Message:
Sent: Jan 07, 2023 04:47 AM
From: Clarence Phoon
Subject: Why is VSX considered stacking
In stacking (at least from my cisco knowledge), there is 1 logical switch and multiple physical.
But in VSX,
Multiple physical switches have different management ip.
Different switches cannot "see" one another.
So why is VSX considered stacking?
VSF is stacking I can argee though.