Re: Cloudstack says it can't not find management interface

[Prashanth Reddy]

Hello Marty,

Cloudstack doesn't care about netplan. Can you please check and confirm if ovs 
bridge mgmt0 exists? Looks like cloudstack agent cannot find it.

You can use the commands
sudo ovs-vsctl show
sudo ovs-vsctl list-br


Thanks
Prashanth


________________________________
From: Marty Godsey <mar...@rudio.net.INVALID>
Sent: Monday, November 3, 2025 10:24 PM
To: users@cloudstack.apache.org <users@cloudstack.apache.org>
Subject: Cloudstack says it can't not find management interface

Hello guys,

I am adding a new cluster of KVM to my zone, and I am getting an error message 
that says the following:

“
Incorrect Network setup on agent, Reinitialize agent after network names are 
set up, details: Can not find network: mgmt0
“

I have pasted below what my Netplan yaml looks like. You can see the mgmt0 
interface. Is this the correct way for this? This is my first KVM cluster. Do I 
need to just provide the bridge name (cloudbr0) and specify a VLAN tag?

Thank you for any direction you can provide.


  *
Marty

# CloudStack KVM Host - cloudbr0 Management Bridge on VLAN 62
# OpenvSwitch bridge on bond0.62

network:
  version: 2
  renderer: networkd
  ethernets:
    enp24s0f0np0: {}
    enp24s0f1np1: {}
    enp94s0f4: {}
    enp94s0f4d1: {}

  bonds:
    bond0:
      mtu: 9000
      interfaces:
      - enp24s0f0np0
      - enp24s0f1np1
      parameters:
        mode: "802.3ad"
        lacp-rate: "fast"
        transmit-hash-policy: "layer2+3"

    bond1:
      mtu: 9000
      interfaces:
      - enp94s0f4
        #      - enp94s0f4d1
      parameters:
        mode: "802.3ad"
        lacp-rate: "fast"
        transmit-hash-policy: "layer2+3"

  vlans:
    bond0.62:
      id: 62
      link: bond0
      dhcp4: false
      dhcp6: false
      mtu : 9000

    bond1.17:
      id: 17
      link: bond1
      dhcp4: false
      dhcp6: false
      mtu: 9000

  bridges:
# Guest
    cloudbr1:
      interfaces: [bond0]
      openvswitch: {}
      mtu: 9000
      parameters:
        stp: false
        forward-delay: 0
# Management
    mgmt0:
      interfaces: [bond0.62]
      openvswitch: {}
      dhcp4: false
      dhcp6: false
      mtu: 9000
      addresses:
        - x.x.x.x/24
      routes:
        - to: default
          via: x.x.x.x
      nameservers:
        addresses:
          - x.x.x.x
          - x.x.x.x
      parameters:
        stp: false
        forward-delay: 0
# Storage
    cloudbr0:
       interfaces: [bond1.17]
              openvswitch: {}
       dhcp4: false
       dhcp6: false
       mtu: 9000
       addresses:
         - x.x.x.x/24
       parameters:
         stp: false
         forward-delay: 0