Riverbed SteelHead 3070-SD, User Manual

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Configuring High Availability on SteelHead SD | 99
Configuring a SteelHead SD HA pair
• The loopback IP address must contain the zones belonging to the current site. It must be a /32
address and should not have a physical port attached to it.
Figure 10-9. Standby LAN HA link
When the AUX link is offline, all the HA traffic is switched to the LAN link. When the master wants to use
the backup appliance uplinks, Generic Routing Encapsulation (GRE) tunnels the packet via the LAN link.
When the backup appliance has a packet to send to the master appliance, it uses the LAN link for GRE
encapsulated packets. When the AUX link comes back up, any further HA traffic uses the AUX link.
Note: If a standby HA link is configured, a firmware download may fail if the AUX port or primary HA link goes down.
Configuring the loopback IP address
Configuring a standby LAN HA link requires that you configure a loopback IP address.
To configure a loopback IP address
1. Create a /32 zone belonging to the site. Do not attach any physical port to it. The /32 zone will appear
under the Routing Loopback zone drop-down list.) For details on creating zones for sites, see the
SteelConnect Manager User Guide .
2. Choose Appliances and select the appliance.