Network redundancy - BlueCat Address Manager - 9.2.0

Address Manager Administration Guide

prodname
BlueCat Address Manager
version_custom
9.2.0

Address Manager and DNS/DHCP Server appliances both support network redundancy through Active/Backup NIC bonding.

Network redundancy through NIC bonding is supported on Address Manager appliances and 4-port DNS/DHCP Server appliances only. It isn't supported on virtual machines.

Address Manager network redundancy:
DNS/DHCP Server network redundancy
  • BlueCat recommends enabling and disabling network redundancy on DNS/DHCP Servers from the Add Server and Replace Server pages of Address Manager. However, if you will be using VLAN tagging with bonding interfaces, you can enable and disable bonding using the DNS/DHCP Administration Console. Bonding must be enabled prior to configuring VLAN interfaces.
To view the state of bonding/network redundancy on the appliance, use the Administration Console. From Main Session mode, type show interfaces and press ENTER.
  • If bonding is disabled, you won't see bond0 in the list of interfaces:
    Proteus> show interfaces
    eth0:
         IPv4 Addresses
             192.0.2.10/24 (Primary)
         Active = on
    eth1:
         Active = off
  • If bonding is enabled, you will see details for bond0 and the bonding mode:
    Proteus> show interfaces
    bond0:
          IPv4 Addresses 
              192.0.2.10/24 (Primary)
          Active = on
          Bond Mode = active-backup
    eth0:
          Active = on
    eth1:
          Active = off
For more detailed information regarding the state of bonding, log in to the server using SSH as root and check the content of the /proc/net/bonding/bond0 file. Refer to the Linux Internet Bonding Driver HOWTO for further specifications.