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How to convert SFP3 & SFP4 from stacking to uplink in S2500

3+4 are not stacking ports out of the box. Did you change them? 

The command is 
Delete stacking interface 
 

No I didn't change them These ports can be used as uplink ports or a combination of two uplink ports and two stacking ports. By default, Ports 0 and 1 are configured as uplink ports and Ports 2 and 3 are configured as ArubaStack ports. The ArubaStack ports are indicated by a box around the port number. These port assignments can be changed to meet your configuration needs from the CLI.

You're right. Fingers moving faster than the brain this morning :)

Use the commands above. 

You are correct, the 2500 has 3 and 4 as stackign and 1 and 2 as normal uplink ports.  Try the commands above andyou should be able to convert 3 and/or 4 to normal uplink ports.

 

 

I think Cappalli hasn't had his coffee yet this morning so he didn't correlate SFP3 and SFP4 to mean the latter two ports of the uplink (0/1/2 and 0/1/3).

 

Clembo has provided the proper instructions on converting the ports to normal uplink ports.

 

Best regards,

 

Madani

Thanks All,

 

it worked

 

I have another question

 

I have 2 Corinex powerline adapters that I use to connect 2 points as there no is way to install any cable

When I connect them to any 2 switches or laptops they work fine, but when I use them between 2 Aruba switches S1500 they don't work.

 

So I think that there is something which block their traffic

Anybody can help??

 

Thanks in advance

 

When you connect these on S1500, even port LEDs won't glow ?

 

or, just that traffic is not passing ? In that case can you check one of these port has moved to STP blocking state (show spanning-tree)

 

 

Thanks,

-Vinay

 

 

Yes, the led is on and the traffic is blocked And when I disabled the spanning the port turned down How can I permit traffic in this case?

 It is strange that disabling STP brings down the link. STP doesn't control physical link/port properties.

 

Now, With ports connected on S1500 with Corinex, and STP enabled (spanning-tree mode mstp),

Can you dump the o/p of  "show interface gigabitethernet <x/y/z>" for ports on both S1500s ?

 

And, when you say  "When I connect them to any 2 switches they work fine"

 - which switches are you refering to ?

 

Also, to confirm the connectivity, is this how they are connected ?

 

S1500-ONE {GE-0/0/1} --------- [Corinex adapter]------------ {GE-0/0/1} S1500-TWO

 

Thanks,

-Vinay

 

The link was done due to another issue
But when I convert it to PVST, everthing worked

But do we have a way to keep the MSTP and unblock the traffic

 

Thanks

 

As we know PVST runs seperate STP instances per VLAN, whch makes some ports in "Forward" state in some VLANs & blocking in others, hence we can achieve kind of load-balancing of traffic

 

 Similar thing can be achieved in MSTP as-well.

 By default when you enable MSTP, only one 'instance' is running which spans on VLANS on the system.

  For better load-balancing of traffic, you can create multiple MST "instances": via something called as "instance VLAN mapping"

  This needs bit planning & deciding a root-bridge for each of those instances for "optimal" topology.

Sample config like below needs to  be configured on all the switches in your topology

 

(IDF-1) (config) #mstp

(IDF-1) (Global MSTP) #region-name REG-1

(IDF-1) (Global MSTP) #instance 0 bridge-priority 16384

(IDF-1) (Global MSTP) #instance 1 bridge-priority 32768

(IDF-1) (Global MSTP) #instance 2 bridge-priority 16384

(IDF-1) (Global MSTP) #instance 1 vlan 100,200     

(IDF-1) (Global MSTP) #instance 2 vlan 300,400

 

  Above config makes VLAN 100,200 as part of MSTP "instance 1", and so on....

 

  And bridge-priority needs to be varied on other switches. In short, Bridge-priority (lower) decides which switch will be root-bridge for specific instance, (Refer MAS documentation for more details...)

 

 

To convert a stcking port to uplink, run the following:

 

delete stacking interface stack <module/port>