HP X.25/9000 User's Guide HP-UX 11i v3 (5900-1523, August 2011)

NOTE: The XOL HA feature is enabled by default in HP-UX 11i v3. Therefore, the -enableXOLHA
option is no longer required.
1. To configure the standby device and the unique MAC address in the configuration file of the
XOL primary interface, modify the following syntax:
Standby_device standby LAN card name # used for local failover
XOL_floating_macaddrunique MAC address
NOTE: Local failover is automatically enabled by defining a standby_device in the
configuration file. If you do not require the local failover feature for this interface, you must
de-configure the standby_device by removing or commenting the line in the configuration file.
The standby XOL interface inherits the configuration of the primary XOL interface during
failover because the same configuration file is used to configure the XOL interface.
Example 15 Configuring standby device and unique MAC address
If the asumptions in the XOL configuration file are the following:
• The primary LAN card is lan0
• The standby LAN card is lan1
• The MAC address is 0x0060B0A4EbE5
Then, the XOL HA parameters take the following values:
standby_device lan1
XOL_floating_macaddr 0x0060B0A4EBE5
NOTE: In the event of a failover, the XOL_floating_macaddr is moved from the primary LAN
card to the standby LAN card. HP recommends that you use the primary and standby LAN
cards only for the XOL links configured with HA feature.
2. To initialize the XOL HA interface with local failover support, run the following command:
x25init -c XOL_config_file -L llc2_conf_def
Remote failover
NOTE: Remote failover, with or without local failover, requires the installation of the ServiceGuard
product on the system. For more information on HP MC/ServiceGuard product, see Managing
MC/ServiceGuard document.
In the ServiceGuard cluster, the remote failover works between LAN cards on different nodes. Each
LAN card has an XOL interface which is defined by the same configuration filename used in the
SG package. The x25ifstate command monitors the XOL interface status. When the XOL
interface fails, the x25ifstate command exits. HP MC/Service Guard detects that the monitor
service belonging to the package has exited and stops the package. HP MC/Service Guard then
starts the same package on the standby node of the ServiceGuard cluster, which starts the XOL
interface on the LAN card on the standby node.
For more information on using the remote failover functionality with Service Guard, see “Configuring
XOL HA for remote failover using Service Guard (SG)” (page 64).
Configuring XOL HA for remote failover using Service Guard (SG)
In Figure 19 (page 65) primary system A and standby system B are part of the SG cluster and
provide remote failover of an XOL interface with X.25 address 1111. The unique, user supplied
64 Configuration