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Chapter 4 System Configuration
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Harmonic MediaGrid Release 4.1
Configuring High Bandwidth ContentBridges in a High Availability (HA) Pair
Configuring High Bandwidth ContentBridges in a High Availability
(HA) Pair
With Harmonic MediaGrid 3.2 and later, you may configure two High Bandwidth ContentBridges
(ContentBridge 2010C/2010D/2010E/2010F) in a high availability (HA) pair, in which one High
Bandwidth ContentBridge is the “active” node and one is the “shadow” node. If the CIFS
processes, FTP, network connectivity, or power fails on the “active” node, the “shadow” node then
becomes “active” and takes over operations. Harmonic provides an HA Pair utility that you may
run to create an HA pair configuration or remove one.
When you run the HA Pair utility, you must specify an IP address for each High Bandwidth
ContentBridge, an additional IP address to be
shared
by both High Bandwidth ContentBridges in
an HA pair, a private subnet for the HA pair to use, and indicate which High Bandwidth
ContentBridge will be the
preferred
node. If both peers fail, in the event of recovery, the preferred
node becomes the "active" node first in order to avoid conflicts resulting from two active nodes.
NOTE:
If you are configuring large numbers of HA pairs, you may wish to use separate power sources for
some “preferred” nodes to plan for possible power outages.
Note that a client must be connected to the
shared
IP address of a High Bandwidth
ContentBridge in an HA pair in order to remain connected in the event of a failover.
HA Pair Configuration Overview
To configure an HA pair:
1. Make sure the High Bandwidth ContentBridges you wish to configure in an HA pair are
running MediaGrid 3.2 or later. For instructions on upgrading, refer to
2. Make sure the High Bandwidth ContentBridges you wish to configure in an HA pair are
connected to each other via the eth1 NIC as described in
ContentBridges in a High Availability (HA) Pair
.
3. Identify the necessary IP addresses for the High Bandwidth ContentBridges you wish to
configure. This includes an additional IP address to be
shared
by both High Bandwidth
ContentBridges in an HA pair, and a private subnet for the HA pair to use. For details, see
Identifying the IP Addresses for HA Pairs
4. To run the HA Pair utility, you may connect directly to either High Bandwidth ContentBridge in
the pair, connect via SSH to one of the High Bandwidth ContentBridges in the pair, or connect
via SSH to one of the ContentDirectors in your Harmonic MediaGrid system.
5. Run the HA Pair utility. See
6. Verify the HA Pair configuration by viewing the HA Pair in SystemManager. See
Paired High Bandwidth ContentBridges in SystemManager
Identifying the IP Addresses for HA Pairs
When you run the HA Pair utility, it asks you to specify the public (eth2) IP address for each High
Bandwidth ContentBridge in the HA pair, the IP address that you wish to be
shared
by the two
High Bandwidth ContentBridges in the pair, and a private subnet to be used by the HA pair.