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Change bond Mode on AHV Hosts

  • April 15, 2026
  • 4 replies
  • 34 views
T
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Hello,

Today I have delivered a three node Cluster to customer.

Cluster was Set Up a few days ago in my Environment with a flat Switch.

Bond mode for both vswitches is active-backup.

Unfortunately Customer had prepared his ToR switches with LACP.

All hosts and CVMs cannot communicate.

What is the recommended procedure to fix ist?

  1. Change bond Mode host by host with manage_ovs  OR
  2. Let network team configure the switches (disable LACP) and configure the clusternodes via Prism, after that let Network Team enable LACP

Kind regards,

Thomas

 

4 replies

JeroenTielen
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Ask network team to enable LACP fallback. Then the nodes will communicate again. Then change bond mode to lacp in gui (prism element → virtual switch → enable lacp). 

 

You can also change the virtual switch via the cvm cli: (make sure you chose the correct interface names)

manage_ovs --bridge_name br0 --interfaces eth0,eth1 --require_link=false --bond_mode balance-tcp --lacp_mode=fast --mtu=1500 update_uplinks

Reboot node. 

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T
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  • ThomasM
  • Author
  • Trailblazer
  • April 16, 2026

Thanks Jeroen!

Kind regards,

Thomas 

T
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  • ThomasM
  • Author
  • Trailblazer
  • April 16, 2026

Update 

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  • ThomasM
  • Author
  • Trailblazer
  • April 16, 2026

Network Team means that there is no LACP Fallback Option on its Extreme switches.

No exos but VOSS/Fabric Engine Switches...

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