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Providing Access to VMS from the Data Network

  • Updated on Aug 6, 2026
  • Published on Aug 5, 2026
  • 2 minute(s) read
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Overview

By default, the VAST Management Service (VMS) is accessed through a dedicated management subnet. In some environments, you may want to provide access to VMS on the data network as well.

VMS supports this requirement by allowing the configuration of an additional management virtual IP (VIP) on the data network. This data network VMS virtual IP listens for VMS traffic and operates independently of and in addition to the standard management virtual IP.

Key Characteristics and Limitations

  • Configuration is performed exclusively via the VAST CLI.

  • The current configuration can be viewed via the VAST CLI.

  • One data network management virtual IP can be configured at a time. The virtual IP may be configured with IPv4 or IPv6, but not both simultaneously.

  • The virtual IP is bound to the data interface of the same CNode as the standard management virtual IP.

  • The configuration can be removed.

High Availability and Failover Behavior

The data network management virtual IP is integrated with VAST high-availability mechanisms:

  • Persistence. The virtual IP persists across reboots. After a reboot, the virtual IP may move to a different CNode if required.

  • Failover. If the hosting CNode fails, the virtual IP automatically fails over to another active CNode, as well as the standard management virtual IP. The virtual IP can only reside on the same CNode as the standard management virtual IP.

  • Cluster changes. Newly added CNodes are eligible to host the virtual IP. If a CNode is deactivated or replaced and it was hosting the virtual IP, the virtual IP fails over automatically.

Configuring a Data Network Management Virtual IP

  • To configure a data network management virtual IP with IPv4, use the vms modify command with the following options:

    • --mgmt-data-vip to specify the IPv4 address.

    • --mgmt-data-netmask to specify the netmask.

    • --mgmt-data-interface to specify which management interface on all CNodes on which to configure the IP.

    • --mgmt-data-vip-gateway to specify a gateway (optional).

    • --mgmt-data-vip-vlan to tag the interface with a VLAN (optional).

    For example:

    vcli: admin> vms modify --mgmt-data-interface bond0 --mgmt-data-vip 1.1.1.1 --mgmt-data-netmask 255.255.0.0

  • To configure a data network management virtual IP with IPv6, use the vms modify command with:

    • --mgmt-data-vip-ipv6 to specify the IPv6 address.

    • --mgmt-data-vip-prefix-ipv6 to specify the prefix for the IPv6 address.

    • --mgmt-data-interface to specify which management interface on all CNodes on which to configure the IP.

    • --mgmt-data-vip-gateway-ipv6 to specify a gateway (optional).

    • --mgmt-data-vip-vlan to tag the interface with a VLAN (optional).

    For example:

    vcli: admin> vms modify --mgmt-data-interface bond0 --mgmt-data-vip-ipv6 2001:db8::10 --mgmt-data-vip-prefix-ipv6 64 --mgmt-data-vip-gateway-ipv6 2001:db8::1

Viewing the Current Configuration

Use the vms show and vms list commands without any parameters to see the current configuration of the data network management virtual IP.

Deleting a Data Network Management Virtual IP

To delete a data network management virtual IP, use the vms modify command with the --delete-mgmt-data-vip option:

vcli: admin> vms modify --delete-mgmt-data-vip