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Configuring Route Management Redundancy

 

Route management redundancy requires the following:

  • Two Ethernet interfaces that are configured for different networks. One is the default interface that contains the default gateway configuration. The second interface provides static routes that use a different next-hop gateway.

  • A virtual IP address for the CTP device. To create a list of the virtual IP addresses that will be associated with the CTP device, select Node > Maintenance > Configure Virtual IPs, and follow the instructions on the pane. You can create up to 56 virtual IP addresses.

  • CTP bundle circuits that use route redundancy should have direct drive disabled to allow for asymmetric routing. See Configuring IP Forwarding for CTP Bundles (CTPView) or Configuring IP Forwarding for CTP Bundles (CTP Menu).

To set up route management redundancy, perform the following tasks:

  1. Configuring a Default Ethernet Interface (CTP Menu)

  2. Configuring an Ethernet Interface with Static Routes (CTP Menu)

  3. Enabling Route Management Redundancy (CTPView)

Configuring a Default Ethernet Interface (CTP Menu)

You are required to reboot the CTP device when you finish this configuration procedure.

To configure the default Ethernet interface by using the CTP Menu:

  1. From the Main menu, select 5) Node Operations.
  2. Select 3) Configure network settings.
  3. Select 2) IPv4 Configuration or 3) IPv6 Configuration.
  4. Follow the onscreen instructions to select and specify a default Ethernet interface.
  5. Configure the options as described in Table 1. Note

    Do not add a route to the default Ethernet interface.

Table 1: Ethernet Interface Parameter Settings in the CTP Menu

FieldFunctionYour Action

Please input the hostname

Specifies the hostname for the CTP device.

Enter a name.

Please input the ip/ipv6

Specifies the IP address of the Ethernet interface.

Enter an IP address.

Please input the netmask

For IPv4 interfaces, specifies the network mask.

Enter the network mask.

Please input the gateway

On the default Ethernet interface, specifies the IP address of the default next-hop gateway, which is the Ethernet interface on the router.

Enter an IP address.

Please input the mtu in bytes

Specifies the maximum transmission unit (MTU) for the Ethernet interface.

For IPv4 networks, enter a number from 64 through 1500.

For IPv6 networks, enter a number of at least 1280.

Configuring an Ethernet Interface with Static Routes (CTP Menu)

Configure an Ethernet interface on a network that is different from the default Ethernet interface, and add static routes to the interface configuration. You can configure metric for static routes to specify priority of the routes on the subnet.

You must reboot the CTP device when you finish this configuration procedure.

To configure static routes for Ethernet interfaces using the CTP Menu:

  1. From the Main menu, select 5) Node Operations.
  2. Select 3) Configure network settings.
  3. Select 2) IPv4 Configuration or 3) IPv6 Configuration.
  4. Follow the onscreen instructions to select a second Ethernet interface to activate on boot, and configure the options as described in Table 2.

Table 2: Ethernet Parameter Settings in the CTP Menu

FieldFunctionYour Action

Please input the ip/ipv6

Specifies the IP address of the Ethernet interface.

Enter an IP address.

Please input the netmask

For IPv4 interfaces, specifies the network mask.

Enter the network mask.

Please input the mtu in bytes

Specifies the maximum transmission unit (MTU) for the Ethernet interface.

For IPv4 networks, enter a number from 64 through 1500.

For IPv6 networks, enter a number of at least 1280.

Add route to interface eth

Specifies whether or not to add static routes to the Ethernet configuration.

Specify yes.

How many routes would you like to add to eth0?

Specifies the number of static routes to add to your Ethernet interface configuration.

Enter a number between 0 and 3.

Please input the network

Specifies the IP address of the static route to the next-hop gateway.

Enter an IP address.

Please input the number of bits in the netmask

For IPv4 networks, specifies the IP mask of the Ethernet interface.

Enter an IP mask.

Please input the gateway

Specifies the IP address of the next-hop gateway (the router).

Enter an IP address.

Please input the metric for this route, -1 for no metric

Specifies the value for metric for the route.

Enter -1 for no metric. If another route with a metric value between 1 and 256 is configured on the same subnet, then the route with no metric takes precedence.

Enter a value between 1 and 256 to enable metric.

Enabling Route Management Redundancy (CTPView)

This topic describes how to enable the route redundancy management feature.

To enable route management redundancy using CTPView:

  1. In the side pane, select System > Configuration.
  2. Set the AutoSwitch Daemon parameter to Enabled.
  3. Click AutoSwitch.
  4. Under AutoSwitch Ethernet Failover Settings, configure the parameters described in Table 3, and click Submit Settings.

Table 3: Route Management Redundancy Settings in CTPView

FieldFunctionYour Action

Status

Enables or disables route management redundancy

Select one:

  • Enabled

  • Disabled

Secondary Revert

Specifies whether or not the CTP device periodically checks the connectivity to the AutoSwitch primary device after a switchover to the secondary device.

Whenever the primary route is unavailable, the traffic is routed through the secondary route configured in the CTP system. Secondary Revert feature applies only when traffic is flowing through the secondary route. When Secondary Revert is enabled, the traffic is routed back to the primary route after a configurable delay, whenever the primary route is back online. If the secondary route is disabled, the route is not switched back to the primary route even if the primary route is available again.

Select one:

  • Disabled—CTP device does not check the connectivity to the primary device.

  • Enabled—CTP device checks the connectivity to the primary CTP device after a switchover. If the primary device becomes available, the CTP device reconnects to the primary CTP device.

Forceful Revert

The Forceful Revert button is enabled only if the Route Management Redundancy status is set to enabled and Secondary Revert is disabled.

If secondary revert is disabled after the switchover from primary device to secondary device, click Forceful Revert to perform switchover from the secondary device to the primary device, provided the primary device becomes available.

Click Forceful Revert to manually switch from the secondary device to the primary device.

Check Period [all functions]

Specifies the frequency with which the CTP software runs a reachability check. For example, if the check period is set for 30, the CTP software verifies whether the next hop is reachable once every 30 seconds.

Select the number of seconds.