We are running 2930M switches in most of our wiring closets. Some of these are in a three-switch stacking configuration. We have DACs connecting the switches as follows:
Sw. 1 stackport 2 connects to Sw. 2 stackport 1
Sw. 2 stackport 2 connects to Sw. 3 stackport 1
Sw. 3 stackport 2 connects to Sw. 1 stackport 1
What we're seeing is that, on some switch stacks, the connection from Sw. 3 to Sw. 1 shows the LEDs flashing green and the CLI command 'show stacking stack-ports' indicates that these two ports are down. So instead of a ring topology, it's a chain topology. Also, the 'show logging' command output lists these two ports (stackport 1, Sw.1 and stackport 2, Sw. 3) constantly being inserted and removed.
We're not seeing this on all our stacks - some are fine with solid green LED status on the stack ports, 'up' status in the 'show stacking stack-ports' command output and not flapping indicated in the log output.
Any idea what might be causing such a condition? First thought is a cable not seated securely, but I'm reluctant to just pull it and re-connect it during working hours - not sure of the effect that would have on connectivity for users, etc.
Hi! what Switch is actually owning the Commander role?
Sw. 1 is commander, Sw. 2 is standby, Sw. 3 is member.
Can i ask when stacking 2930M swtiche using the DACS and the 2 port stacking module - should the cables "cross"
IE Switch 1 - Port 1 connects to Switch 2 Port 2
Or should they be Switch 1 port 1 connects to Switch 2 port 1
On Aruba 2930M - first thing first - you don't for a Backplane Stack by using "normal" DAC Cables but, instead, you must use special Stacking Cables (they look similar to DAC but they haven't the typical expected SFP+ form factor).
So...on a two Members Backplane Stack you can use both Stacking Ports concurrently (each Stacking Module has 2 Stacking Ports) and you can do it by linking any-to-any:
SW1 Stack Module Port 1 <--> Port 1 Stack Module SW2
SW1 Stack Module Port 2 <--> Port 2 Stack Module SW2
SW1 Stack Module Port 1 <--> Port 2 Stack Module SW2
SW1 Stack Module Port 2 <--> Port 1 Stack Module SW2
in any case you're forming a Ring Topology.
It's clear that if you have Three Aruba 2930M you will be forced to a Chain Topology where:
SW2 Stack Module Port 1 <--> Port 2 Stack Module SW3
SW3 Stack Module Port 1 <--> Port 2 Stack Module SW1 (which closes the loop into SW1)
SW2 Stack Module Port 2 <--> Port 2 Stack Module SW3
Fantastic - thats as i expected as how i have set them up.
Many thanks for your assistance
Do the ports have to match, or can you do:
SW 1 port 1 --> SW 2 port 2
SW 2 port 1 --> SW 3 port 2
SW 3 port 1 --> SW 1 port 2?
So "crossing over" every time you connect? (Btw is the logic same for VSF on 2930F)?
Aruba 2929 Backplane Stacking cabling: it can be any-to-any.
So on a Three Member Stack you can have:
SW 3 port 1 --> SW 1 port 2
SW 1 port 1 --> SW 2 port 1
SW 2 port 2 --> SW 3 port 2
SW 1 port 2 --> SW 2 port 2
SW 2 port 1 --> SW 3 port 1
SW 3 port 2 --> SW 1 port 1
On a Two Member Stack:
SW 1 port 2 --> SW 2 port 1
It's more a matter of having good stacking cabling on the backplane than respecting a particular connection pattern.
I have 5 switches 2930M (JL322A) that I need to stack. I have JL325A stackable modules. Since this is the first time that I am doing this. Can you tell me the procedure (commands and steps).
The switches are already linked together with the J9735A cable stack.
Thank's a lot
Hello ,I have 5 switches 2930M (JL322A) that I need to stack. I have JL325A stackable modules. Since this is the first time that I am doing this. Can you tell me the procedure (commands and steps).The switches are already linked together with the J9735A cable stack.Thank's a lot
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