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Configuration

Configuring the High Availability Feature for X.25 over LLC2

Chapter 3 81

Configuring the High Availability Feature for

X.25 over LLC2

This section describes how to configure the local and remote failover

features for X.25 over LLC2 (XOL) interface. It also describes the local,

remote, and a combination of local and remote failover.

WARNING The failover is not transparent and results in loss of data and

existing connections. After a failover, the XOL connections must

be re-established.

Unique MAC Address Requirement

XOL High Availability (XOL HA) is based on sharing a unique MAC

address for the primary and standby LAN cards, whichever is active. The

use of a unique MAC address makes the card swap transparent from the

XOL router side or peer system, which sees the same MAC address

associated with the active interface.

NOTE To avoid MAC address collision, the system administrator must identify

an unused, unique MAC address in their LAN subnet. The lanadmin

command is used to change the MAC address of the card. After failover,

the failed LAN card is reconfigured with its factory default MAC

address. XOL is not supported over APA (Auto Port Aggregation).

Before you run the lanadmin command to set up the unique MAC

address, you may test whether the MAC address chosen by you is

selected by running the linkloop command. For more information, see

linkloop (1m). The uniqueness of the MAC address is verified on the

LAN cards currently active in the LAN segment. The linkloop

command sends an OK message if the MAC address is already in use.

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HP CommonIO Products Manual de usuario Pagina 81