HP StoreOnce B6200 Installation Planning and Preparation Guide (EJ022-90995, November 2013)

connections; if the active network link fails then traffic moves to the backup port. It is used as
the default bonding mode for Templates 1, 3, 4 and 5.
• Mode 4 (IEEE 802.3ad Dynamic Link Aggregation)
This bonding mode is also known as LACP and requires a special external switch configuration.
It provides a link aggregation solution, increasing the bond physical bandwidth but can only
work if all the ports in the bond are connected to one switch or switches joined by an interswitch
link. It is recommended when :
◦ The customer wants to increase throughput to the StoreOnce appliance
◦ Trunks between switches on the customer network already use LACP mode
The LACP protocol only works when it is configured on both ends of the physical connection.
Please refer to your switch documentation for information on LACP configuration.
• Mode 6 (Active Load Balancing)
This mode provides a load balance solution. It does not require specific external switch
configuration, but does require the switch to allow ARP negotiation. It can be used in a 2–switch
configuration. However, in some environments ARP packet negotiation may be disabled within
the network infrastructure, so this mode may not be appropriate. This is the default bonding
mode for Template 2.
NOTE: It is recommended that network switches have their Spanning Tree protocol configuration
enabled before connecting the StoreOnce appliance.
Gateway considerations
When the network is configured, you are prompted to provide an IP address for a default gateway,
which will be used to route management and data traffic to and from an external network. Two
of the templates support customer sites with two sub-nets and allow you to route data traffic on one
network and management on the second. For software revision 3.3.0 and greater, for these
templates you are given the opportunity to provide the IP address of a second gateway and specify
which type of traffic it should take.
There are up to three choices when configuring the network (using the StoreOnce CLI):
• No external gateways: If the customer wants to use the HP StoreOnce B6200 Backup System
in a totally isolated network environment, they should not configure an external gateway (the
HP support engineer will simply skip this step during configuration)
• One external gateway: This is the standard configuration with templates 2, 3 and 5, where
data and management traffic are routed to the same subnet, so only one external gateway is
required. When used with templates 1 and 4, the customer must select which subnet (data or
management) will have the ability to communicate with the external gateway.
• Two external gateways (applies to templates 1 and 4 only and for software revision 3.3.0
and greater): This configuration allows both management and data subnets to communicate
with the external network. The IP addresses of the two gateways are provided during the
network configuration. The customer must select whether data or management traffic will use
the 'default' gateway.
NOTE: In this context, 'default' is purely a mechanism to allow the user to specify a gateway for
one type of traffic; the second gateway is automatically used for the other type of traffic.
Supported network configurations (templates) 15