Configuring Y-Cable Redundancy for the Bundle (CTP Menu)
A CTP series device provides two types of Y-cable redundancy.
Redundancy by using a hardware link that uses a special Y cable—A hardware link requires a special Y cable that connects the CTP devices and is supported only on serial ports. The functioning of a hardware link is similar to the default operation of the redundancy feature in CTPOS Release 6.5 and earlier. A hardware link is supported only on serial ports.
Redundancy by using a software link that does not depend on a signaling hardware like the Y cable—A software link does not require a special signaling hardware. Y-cable port pairs can maintain contact with each other by means of OAM packets instead of a hardware signaling path. Because of this, Y-cable redundancy is supported on T1E1 ports as well as serial ports with a special Y cable. Redundancy by means of a software link is supported on both serial and T1/E1 ports on CTP150 and CTP2000 devices.
When you configure Y-cable redundancy that uses a hardware link, you can use different redundant port numbers if the devices are using the same port on the 100-pin connector. For example, a Y cable 100-pin connector could be attached to ports 0-3 on the first CTP device, with the second connector attached to ports 8-11 on the second device. The redundant ports would be P0/P8, P1/P9, P2/P10 and P3/P11 on the first and second CTP devices, respectively.
Before you begin:
Disable the bundle before you modify the bundle options.
To configure Y-cable redundancy for CTP bundles by using the CTP Menu:
- From the Main Menu, select 1) Bundle Operations.
- Select 1) CTP.
- Select a bundle from the list.
If you select an active bundle, you are prompted to disable the bundle before configuring it.
- Select 3) Port Config.
- Select 4) Advanced Options > 19) Redundancy Options > 1) Redundancy Mode and configure configure the options as described in Table 1.
- Configure AutoSwitch settings for bundle failover. See Configuring Bundle Failover Between CTP Devices at Alternate Sites (CTPView).
Displays a list of supported redundancy modes. See Redundancy Features Overview for a list of supported Y-cable redundancy configuration settings.
Pri/Sec Link Type
Specifies the link types for primary and back up bundle.
Specifies the primary and backup bundles.
Configure a primary and a backup bundle. When the software link is enabled and link partners are specified, the software verifies that there is a matched primary and backup pair.
Other Port on Y
Specifies information about the other port of the redundant primary and backup pair.
Specify the following parameters:
Allows fast switching in case of a failover. This feature is supported only on serial ports with hardware links.
Fast switch is supported only in Hot standby in Revert redundancy mode and is valid only for a hardware link.
Select y or n.