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ArubaOS-CX 10.02 VSX with spanning tree

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  • 1.  ArubaOS-CX 10.02 VSX with spanning tree

    Posted Mar 20, 2019 02:44 PM

    Hi,

     

    More advice needed.

    I'm replacing a Cisco network core with a pair of 8320's setup with VSX. The existing network infrastructure is utising spanning tree. As the 8320's will be the centre of the network, i was going to make them the root of the spanning-tree domain.

    On the 8320 i enabled MSTP on both switches and for some some reason it blocks the data on the ISL LAG. I have disconnected everything (even the keepalive) so only the ISL LAG is in place and it remains blocked until i disable spanning tree on one of the switches.

     

    Could someone let me know what the best practice is when it comes to introducing VSX into an enviroment running spanning-tree.

     

    Can spanning-tree be left off the VSX switches and left on all the other switches in the network?



  • 2.  RE: ArubaOS-CX 10.02 VSX with spanning tree
    Best Answer

    Posted Mar 21, 2019 06:14 AM

    Just an update on this, i have resolved the issue and MSTP is now working ok with the VSX, what i think caused the issue was me putting in the command span prio 1, i believe this is a rpvst command which is not compatible with VSX, when i got rid og that command and setup MSTP correctly all worked fine.



  • 3.  RE: ArubaOS-CX 10.02 VSX with spanning tree

    Posted Apr 06, 2019 02:08 PM

    Hey,

     

    today we had a similar problem with MSTP.

     

    Please note that you have to configure BOTH VSX-Members with the SAME spanning-tree priority.

     

    If the spanning-tree priority is different, the ISL goes in blocking state.

     

    I hope this helps someone.

     

    Andy



  • 4.  RE: ArubaOS-CX 10.02 VSX with spanning tree

    Posted Nov 11, 2019 01:52 PM

    Is there any document pointing to that? Good info



  • 5.  RE: ArubaOS-CX 10.02 VSX with spanning tree

    MVP GURU
    Posted Nov 11, 2019 03:53 PM

     

    @abteenz wrote:

    Is there any document pointing to that? Good info

    look L2 guide



  • 6.  RE: ArubaOS-CX 10.02 VSX with spanning tree

    MVP GURU
    Posted Nov 11, 2019 06:21 PM
    @abteenz wrote: Is there any document pointing to that? Good info

    Hi @abteenz, a good starting point would be for sure the Chapter 8 "STP over VSX" available on the latest ArubaOS-CX 10.04 Virtual Switching Extension (VSX) Guide; a same chpater is available on the ArubaOS-CX 10.03 Virtual Switching Extension (VSX) Guide too...there you will find plenty of informations about MSTP/RPVST

     

    Note that ArubaOS-CX 10.02 supports MSTP only (see the ArubaOS-CX 10.02 Virtual Switching Extension (VSX) Guide Chapter 3 VSX -> "Multiple Spanning Tree Protocol (MSTP)" Paragraph).