Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 324)

308 Brocade Virtual ADX Server Load Balancing Guide
53-1003247-01
Hot Standby HA Configuration Considerations
6
Promiscuous mode with shared MAC option
When a server does not honor gratuitous ARP, the virtual switch in the ESX hypervisor needs to be
set to promiscuous mode.
This mode is known to the Brocade Virtual ADX based on an optional keyword configured in the
server backup ethernet port vlan-id vlan MAC [shared-mac] command, where MAC is normally one
of the HA sync port MAC out of the two Brocade Virtual ADXs. The new optional keyword
shared-mac indicates if promiscuous mode is “ON”.
Hot Standby HA Configuration Considerations
When configuring Hot Standby HA, consider the following:
• If only one device is present and the Hot Standby HA feature is enabled, the Brocade Virtual
ADX will function in "single-box" mode until the second Brocade Virtual ADX becomes available.
• There are two versions of Hot Standby HA:
• Standard Hot Standby HA - The Brocade Virtual ADX management IP, VIPs, and real servers
are all in the same subnet.
• Source-IP/src-standby-ip Hot Standby HA - The Brocade Virtual ADX management IP and
VIPs are in one subnet. Real servers are in a different subnet. Additional commands are
required for this version.
Configuring standard Hot Standby HA
Figure 36 shows the minimum required configuration for Standard Hot Standby HA.
FIGURE 36 Minimum required configuration for Standard Hot Standby HA
Perform the following steps to enable this configuration.
1. On Brocade Virtual ADX A, place the untagged Hot Standby HA port (sync-link) in its own
port-specific VLAN:
Virtual ADX-A(config)#vlan 999 by port
Virtual ADX-A(config-vlan-999)# untagged ethe 3
Placing the Hot Standby HA port in its own VLAN prevents unnecessary traffic from going over
the backup (sync) link.