Port


Use the Port subtab to view and provision the G1000-4 and G1K-4 card port settings.

Port

The card port number.

Port Name

Name of the optical port.

Admin State

Shows the administrative state of the port. Choosing an administrative state from the drop-down list and clicking Apply changes the port's service state unless network conditions prevent the change. Admin states include:

  • unlocked: Puts the port in-service. The port service state changes to unlocked-enabled.

  • unlocked, automaticInService: Puts the port service state in unlocked-disabled,automaticInService.

  • locked,disabled: Removes the port from service and disables it. The port service state changes to locked-enabled, disabled.

  • locked,maintenance: Removes the port from service for maintenance. The port service state changes to locked-enabled, maintenance.

Service State

An autonomously generated state that gives the overall condition of the port. Service states appear in the format: Administrative State-Operational State, Status Attribute. Port service states include:

  • unlocked-enabled: The port is fully operational and performing as provisioned.

  • unlocked-disabled,automaticInService: The port is delayed before transitioning to the unlocked-enabled service state. The transition to unlocked-enabled depends on correction of conditions, or on a soak timer. Alarm reporting is suppressed, but traffic is carried.

  • locked-enabled,disabled: The port is out-of-service and unable to carry traffic.

  • locked-enabled,maintenance: The port is out-of-service for maintenance. Alarm reporting is suppressed, but traffic is carried and loopbacks are allowed.

AINS Soak

Auto-in service soak. The amount of time left before the traffic/termination transitions to IS state.

Media Type

If a Gigabit Interface Converter (GBIC) is attached to the card, indicates the GBIC type: SX, LX, Zx, CWDM, or DWDM. If a GBIC is not attached, "unknown" appears.

Flow Control

If checked, enables the IEEE 802.3z flow control and buffering to reduce data congestion on the port (default). If flow control is enabled, the Ethernet device attached to the card must be set to autonegotiation. If flow control is enabled but the negotiation status indicates no flow control, check the autonegotiation settings on the attached Ethernet device.

Auto Negotiation

If checked, sets the port for autonegotiation. To enable flow control, the port must be set to autonegotiation.

Negotiation Status

Shows the result of the most recent autonegotiation and the type of flow control that was negotiated.

Max Size

Sets the maximum Ethernet frame size:

  • Jumbo: Accepts jumbo-size Ethernet frames (ranging from the standard 1518 bytes up to 9000 bytes).

  • 1548: Sets the maximum Ethernet frame size at 1548 bytes. This size enables the port to accept valid Ethernet frames that use protocols, such as Inter-Switch Link (ISL). ISL adds 30 bytes of overhead and might cause the frame size to exceed the traditional 1518 byte maximum.

Payload Type

A high-level data link control (HDLC)-based encapsulation for transport of Ethernet traffic over SONET. Options are LAN extension protocol (LEX)-frame check sequence (FCS)-16 (two bytes) and LEX-FCS-32 (four bytes).

TXP Port

Allows you to choose a port for transponder mode. When you choose a transponder (TXP) port from the drop-down list, Cisco Transport Controller (CTC) automatically completes the TXP Mode for the port(s).

TXP Mode

When you choose the TXP port(s), CTC automatically completes the TXP Mode for the port(s), although you can modify CTC's default selection:

  • TX/RX: Transmit and receive

  • RX only: Receive only

  • TX only: Transmit only

Water Marks

Provisions the flow control buffer memory levels (water marks):

  • Default: Sets Flow Control Lo and Flow Control Hi to the default settings.

  • Low Latency: Sets Flow Control Lo and Flow Control Hi to the low latency settings. Low latency is best for subrate applications, such as voice-over-IP (VoIP) over an STS-1.

  • Custom: Allows you to enter custom Flow Control Lo and Flow Control Hi values.

Flow Ctrl Lo

Shows the low flow control buffer level for the water marks setting. If you chose Custom from the Water Marks drop-down list, type the desired low flow control buffer level.

Flow Ctrl Hi

Shows the high flow control buffer level for the water marks setting. If you chose Custom from the Water Marks drop-down list, type the desired high flow control buffer level.

Apply

Applies changes made to the fields in the tab.

Reset

Cancels any changes to the tab and returns the fields to their last-saved settings.

Help

Displays context-sensitive help.