set chassis compatibility-mode (S-Series)

Use this command to set the S-Series chassis module compatibility mode.

Syntax

Parameters

Defaults

• The default fabric compatibility mode is auto.
• The default chassis index is 1.

Mode

All command modes.

Usage

There are currently two S-Series fabric module versions available. The older version exists on the S-Series S130, S150, and S155 modules. The newer version exists on the S-Series S140 and S180 modules. The two S-Series fabric versions are not compatible. Older and newer fabric modules can not be installed in a mixed configuration on the same system. You can mix older and newer I/O modules in the same chassis, but if a newer I/O module exists in the chassis, only newer (S140 and S180) fabric modules can be installed in that chassis.

There are two exception to mixing older and newer I/O modules in the same chassis:

• You can not mix S130 and S140 I/O modules in an S3 chassis
• Older I/O modules can not be used in VSB configurations using dedicated VSB hardware interconnect ports (set bonding mode (S-Series) for VSB hardware interconnect mode details).

Once older and newer S-Series module restrictions are met, you must assure that an appropriate compatibility mode is configured for the system. There are three compatibility mode settings: auto, v1, and v2.

When configured, the auto fabric compatibility mode actively determines the appropriate V1 or V2 setting for the system only when booting in a cleared (default) configuration state. Based upon the hardware installed at boot time, the appropriate fabric compatibility mode is operationally set and persists across subsequent system boots. If subsequent hardware changes occur requiring a module compatibility mode change, unless the configuration has been cleared, the module compatibility mode does not get changed, and any new hardware not appropriate to the current operational compatibility mode remains non-operational upon system boot. If changes that are not compatible with the current configuration occur subsequent to an initial auto compatibility mode bott, the appropriate v1 or v2 compatibility mode must be administratively entered or system configuration must be cleared for all hardware to be operational upon reboot.

Note

Chassis compatibility mode defaults to auto. You do not need to modify this default setting so long as you either do not modify the module configuration in the chassis or the modification of the module configuration is appropriate to the current operational chassis compatibility mode. The operational chassis compatibility mode is displayed in the show chassis compatibility-mode command output.

V1 compatibility mode is specified for chassis that have only older version modules installed or for chassis with supported mixed version modules installed.

V2 compatibility mode is specified for chassis that have only newer version modules. Should an older version module be present when the operational compatibility mode is set to v2, the older version modules will not become active.

Note

When administratively changing the compatibility mode to a mode that will change the current operational compatibility mode an appropriate warning displays and the system resets.

Refer to Chassis Compatibility Mode (S-Series) in the S-, K-, and 7100 Series Configuration Guide for a more detailed discussion of chassis compatibility mode.