> BITS Port Configuration Mode Commands
> The Building Integrated Timing Supply (BITS) port configuration mode provides the commands to configure the BITS ports on the SPIO and optionally to configure the transmit timing source.
> Important: The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).
> default
> Restores the port’s default speed and communication mode.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> default { mode | preferred slot }
> mode
> Default: none
> Sets the default for the ports framing mode.
> preferred slot
> Default: non-revertive
> Sets the port for non-revertive operation for port redundancy auto-recovery; requiring an administrative user to manually issue a port switch command to return service to the original port.
> Usage
> Restores port-level parameters to their default values.
> Example
> Use the following command to remove any setting for this port’s framing mode:
> default mode
> description
> Defines descriptive text that provides useful information about the port.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> description text
> no description
> no
> Erases the port’s description from the configuration file.
> text
> text must be a string of 1 to 79 alphanumeric characters with no spaces or a string within double quotes that includes printable characters. The description is case-sensitive.
> Usage
> Set the description to provide helpful information, for example the port’s primary function, services, end users. Define any information, the only limit is the number of characters.
> Example
> Use the following command to set a sample port description in the configuration file:
> description samplePortDescriptiveText
> Use the following command to set a more readable description:
> description “This is a sample description”
> end
> Exits the BITS port configuration mode and returns to the Exec mode.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> end
> Usage
> Change the mode back to the Exec mode.
> exit
> Exits the BITS port configuration mode and returns to the Global configuration mode.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> exit
> Usage
> Return to the Global configuration mode.
> mode
> Configures the framing mode for the port.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> mode { e1 | t1 } framing type
> e1 | t1
> e1 selects the SDH E1 framing mode.
> t1 selects the SONET T1 framing mode.
> framing type
> basic: Selects the Frame Alignment Signal (FAS) used with E1.
> crcmf: Selects the Multiframe with CRC (FAS+CRC) used with E1.
> esf: Selects the extended superframe format used with T1.
> sf: Selects the superframe format (D4) used with T1.
> Usage
> Set the ports framing mode parameters.
> Example
> Configure the port to support E1 with crcmf framing.
> mode e1 framing crcmf
> preferred slot
> Identifies which card in a chassis should assume revertive (redundancy auto-recovery) functionality should the slot/port being configured go down. There are only two SPIO, one in slot 24 and the other in slot 25.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> preferred slot slot#
> [ default | no ] preferred slot
> default
> Default: non-revertive operation.
> no
> Disables revertive, or auto-recovery, operation for the port.
> slot#
> Identifies the physical slot in the chassis where the SPIO is installed.
> Usage
> This command enables or disables revertive port redundancy. So after a port failover, when the original port is restored to service (i.e. link up) the system will return service to that port automatically.
> Disabled, which is the default setting, causes non-revertive operation; requiring an administrative user to manually issue a port switch to command to return service to the original port.
> Example
> Use this command to set the ports on the card in slot 25 as “preferred” for port redundancy:
> preferred slot 25
> recover
> Configure line-timing so the SPIO recovers the transmit timing source from an external source via one of the line cards in the chassis. The recovered clock is then distributed for use to all line cards in the chassis.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> recover { line1 slot# | line2 slot # }
> no recover { line1 | line2 }
> no
> Deletes the identified line-timing source definition from the configuration.
> line1 slot#
> Sets first priority for line-timing clock recovered from the line card in the specified slot.
> slot#: a number between 1 and 48.
> line2 slot#
> Sets second priority for line-timing clock recovered from the line card in the specified slot.
> slot#: a number between 1 and 48. Can not be the same slot number entered for line1.
> Usage
> Define which line-timing source has priority.
> Example
> Configure the line card in slot 19 as the preferred source for line-timing.
> recover line1 19
> shutdown
> Terminates all processes supporting the port or blocks the shutting down of the port. Conversely, this command with the no keyword enables the port and BITS -timing as a transmit timing source.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> [ no ] shutdown
> no
> Enables the port’s administrative state. When omitted the card is shutdown (removed from service).
> Usage
> Shut down a port prior to re-cabling and/or other maintenance activities.
> This command with the no keyword is required to bring a port into service.
> Example
> Use the following command to enable the port for service:
> no shutdown
> snmp trap link-status
> Enables/disables the generation and sending of an SNMP (notification) trap when the port experiences a change of state (up or down).
> Product
> All
> Privilege
> Security Administrator, Administrator
> Syntax
> [ no ] snmp trap link-status
> no
> Disables the sending of traps for link-status changes.
> Usage
> Enable the sending of link-status change traps if there is a monitoring facility that can use the information or if there are troubleshooting activities in progress.
> Example
> Use this command to enable sending of link-status SNMP traps:
> snmp trap link-status
> Use this command to disable sending of link-status SNMP traps:
> no snmp trap link-status

Cisco Systems Inc.
Tel: 408-526-4000
Fax: 408-527-0883