Cisco Explorer 4700 Installation Guide download pdf (Page 415)

11-19

Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance

OL-26645-02

Chapter 11 Configuring High Availability

Tracking VLAN Interfaces for High Availability

Use this procedure to configure a tracking and failure detection process for a VLAN interface.

Note When a virtual context is in either the Standby Hot or Standby Warm state (see High Availability Polling,

page 11-2), the virtual context may receive configuration changes from its ACE peer without updating

the Device Manager GUI. As a result, the ACE appliance Device Manager GUI will be out of

synchronization with the CLI configuration. If you need to check configuration on a standby virtual

context using the tracking and failure detection process, we recommend that you first perform a manual

synchronization using either the CLI Sync or CLI Sync All buttons before checking the configuration

values.

Procedure

Step 1 Choose Config > Virtual Contexts > HA Tracking And Failure Detection > Interfaces. The Track

Interface table appears.

Step 2 Click Add to add a new tracking process to this table, or select an existing entry, and then click Edit to

modify it. The Track Interface configuration screen appears.

Step 3 In the Track Object Name field, enter a unique identifier for the tracking process. Valid entries are

unquoted text strings with no spaces and a maximum of 64 alphanumeric characters.

Step 4 In the Priority field, enter the priority for the interface on the active member. Valid entries are integers

from 1 to 255 with higher values indicating higher priorities. The values that you enter here and in the

Interface Peer Priority field (see Step 6) reflect the point at which you want switchover to occur. If the

tracked interface goes down, the priority of that fault-tolerant group is decremented by the value entered

in the Priority field. If the priority of the fault-tolerant group on the active member falls below that of

the standby member, a switchover occurs.

Step 5 In the VLAN Interface field, select the fault-tolerant VLAN that you want the active member to track.

Step 6 In the Interface Peer Priority field, enter the priority for the interface on the standby member. Valid

entries are integers from 1 to 255 with higher values indicating higher priorities. The values that you

enter here and in the Priority field (See Step 4) reflect the point at which you want switchover to occur.

If the tracked interface goes down, the priority of that fault-tolerant group is decremented by the value

entered in the Interface Peer Priority field. If the priority of the fault-tolerant group on the active member

falls below that of the standby member, a switchover occurs.

Step 7 In the Peer VLAN Interface field, enter the identifier of an existing fault-tolerant VLAN that you want

the standby member to track. Valid entries are integers from 1 to 4096.

Step 8 Do the following:

• Click Deploy Now to save your entries and to return to the Track Interface table.

• Click Cancel to exit this procedure without saving your entries and to return to the Track Interface

table.

• Click Next to save your entries and to configure the next entry in the Track Interface table.

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Cisco Explorer 4700 Installation Guide Page 415