Technical Documentation

Failover of the Control Service PICs

If you are running the pgcpd process (BGF voice solution) or associated pgcpd and BGF processes (IMSG voice solution) on services PICs, you can use a 1:1 redundancy model to pair two services PICs in high availability mode using a virtual redundant MultiServices PIC (rms) interface. When you configure the rms interface, one of the PICs is set as the primary and the other as the secondary PIC. When the rms interface comes up, the primary PIC comes up as active and the secondary PIC as standby.

On failure of the active PIC, the standby PIC becomes active and traffic is switched over to the new active PIC. When the failed primary PIC is restored, it comes up as standby. You must explicitly request a reversion to the primary PIC to make it active again. Otherwise, it continues in standby mode until the active PIC fails.

The topic consists of the following procedures:

Configuring the rms Interface

You must first create and specify the primary and secondary service PIC and the inside and outside service domains. When a new rms interface is created, PICs designated as primary and secondary reboot automatically. If either the primary or secondary PIC, or both, are changed, the corresponding old and new rms interfaces reboot automatically.

To configure the rms interface:

  1. Configure and enter edit mode for the interface.
    [edit]user@host# edit interfaces rms0
  2. Specify the service PIC that is to be the primary PIC.
    [edit interfaces rms0]user@host# set redundancy-options primary ms-1/2/0
  3. Specify the service PIC that is to be the secondary PIC.
    [edit interfaces rms0]user@host# set redundancy-options secondary ms-1/3/0
  4. (Optional) Configure hot standby to ensure that failover occurs in 5 seconds or less.
    [edit interfaces rms0]user@host# set redundancy-options hot-standby
  5. Configure a logical unit and specify the protocol family.
    [edit interfaces rms0]user@host# set unit 0 family inet

Specifying the rms Interface as the Platform Device for the Virtual BGF

In your virtual BGF configuration, configure the rms interface as the platform device for the virtual BGF.

To configure the rms interface as the platform device:

  • [edit services pgcp gateway bgf-1]user@host# set platform device rms0

Manually Switching from the Primary Control Services PIC to the Secondary PIC

You can manually switch from the primary PIC to the secondary PIC.

To manually switch from the primary to the secondary PIC, at the operational mode command prompt, enter the following command. The system response indicates whether the command was successful.


user@host>request interface rms0 switchover
request succeeded

Manually Reverting from the Secondary PIC to the Primary PIC

You can manually revert from the secondary PIC to the primary PIC.

To manually revert from the primary to the secondary PIC, at the operational mode command prompt, enter the following command. The system response indicates whether the command was successful.


user@host> request interface rms0 revert
request succeeded

Displaying the Status of the Redundant Service PICs

Purpose

Display the status of the redundant service PICs. You can use this command to determine which PIC is currently active.

Action


Interface   State           Last change    Primary   Secondary  Current status 
rms0         Not present                   ms-1/2/0  ms-1/3/0     both up 
rms1         On secondary   1d 23:56       ms-1/1/0  ms-0/2/0     primary down 
rms2         On primary     10:10:27       ms-1/3/0  ms-0/2/0     secondary down

Published: 2010-04-22