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modgod
New Member
July 23, 2019
Question

HA Cluster and multiple switches - physical setup advice

  • July 23, 2019
  • 1 reply
  • 31352 views

Hi Guys and Gals,

 

I have been tasked with repatching our network rack. It's an absolute mess and there are several issues with the way cabling has evolved over the years e.g. daisy chained switches, that are causing some strange issues on the network, IP clashes and DHCP issues.

 

Network design is relatively new to me so please bare with me and let me know if I miss out any vital info.

 

We have two network racks connected with a fibre link approx 100m apart.

 

Network rack A contains - 

[ol]
  • 2x Fortigate 200D (one currenrly offline, to be installed during repatch)
  • 2x HP Aruba 2530 48G switches
  • Fibre patch panel connecting to rack B[/ol]

     

    Network rack B contains - 

    [ol]
  • 2x HP 1920 switches
  • Fibre patch panel connecting to Rack A[/ol]

     

    Is the following configuration acceptable?

     

    Internet------Fortigate------Aruba Switch1-----Aruba Switch2----SFP-------Fibre link-------SFP------HP 1920------HP 1920

     

    Basically all 4 switches connected to one another then connected to the Primary fortigate, secondary fortigate will also be connected to Aruba Switch 1 so it can take over if the primary unit fails.

     

    I had initially planned to have each switch connected directly to each fortigate as this seemed the right way rather than daisychaining them but I just had a 15 minute call with a network tech and they said that connecting each switch to the next (uplink as they put it) was an acceptable network setup.

     

    We have had issues here since I started working with Avaya phones losing static IP's, stating they are in use, and constant "invalid address" entries on our DHCP list. I thought this was due to the daisychaining, e.g. the switch on the end not updating is MAC table fast enough to keep up with the rest.

     

    Any advice welcome.

    • 1 reply

      orani
      New Member
      July 23, 2019

      Hello,

       

      I think that your scenario is acceptable, but in my opinion i think that this is not the best practice as you don't have ha at the Aruba switches. For example, if Aruba Switch 1 fails, then everything fails. I would suggest a configuration like the screenshot below.

       

       

       

      In my scenario, if a FGT fails, everything continue to work fine. If an Aruba fails, you lose only the connected servers and machines at that switch. Same for 1920's.

       

      modgod
      modgodAuthor
      New Member
      July 23, 2019

      Hi Orani,

       

      Thank you very much for your reply.

       

      would you have any idea how HA can be setup on the Aruba switches? I'm asuming this isn't just a matter of cross connecting the switches as this would be a loopback.

      orani
      New Member
      July 23, 2019

      You have to enable the spanning tree feature at your aruba and 1920's. You can find it under "Traffic" tab at your web gui.