Is "RAPID-PVST+" and "rapid-pvst" one and the same ?

[costaspal]

Hello Community !

I know this will sound stupid but I have to ask...!

We have a (CatOS) Cat.6509 connected to a Nexus 5672.

The c6509 reports :

> (enable) sh spantree summ
Spanning tree mode: RAPID-PVST+

while the Nexus reports :

# sh span sum
Switch is in rapid-pvst mode

Was I wrong to assume these two are the same with different syntax ?

We're troubleshooting weird, "phantom" like behavior (i.e. working / non-working, and vice versa) and I'm trying to verify everything...

I do not have any indication that this is actually an STP issue - just trying to make sure.

Thanx in advance.

Costas

[Reza Sharifi]

Hi,

Similar but not exactly the same

Have a look at this post:

https://community.cisco.com/t5/switching/pvst-rstp-and-rapid-pvst/td-p/1459012

HTH

[costaspal]

Thanx for the effort !
Just so happened that I had come across that article and it does not answer my question.
I'm trying to find-out if there is an actual difference between the two since they both report the same mode but one of them also has a "+" sign at the end.

[balaji.bandi]

they work as same but nexus command syntax same as below explained :

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx-os/layer2/configuration/guide/Cisco_Nexus_7000_Series_NX-OS_Layer_2_Switching_Configuration_Guide_Release_5-x_chapter7.html#con_1067031

[costaspal]

Thanx for replying BB !
According to this doc - and to what I knew and suspected - the Nexus does support "Rapid PVST+" it just does NOT display the "+" as output of the corresponding show command.
That was my doubt, not the syntax.
Do you agree or you wanted to make another point ?

[balaji.bandi · Accepted solution]

yes agreed ....IOS and nexus bit different but same goal.