Cisco WS-C3550-12G, Руководство пользователя

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Cisco Catalyst Switch Manager User Guide
OL-4930-01
Chapter 8 Interface and Subinterface Management
POS Interface Management Window
Private VLAN Edge
The Private VLAN Edge area provides the following information:
• Status—Displays the status of private VLAN edge configuration on the interface. Status may be one
of the following values:
– Enabled
– Disabled
–
Not Applicable—VLANs are not supported on the device
• Enable—Enables configuration of the private VLAN edge on the interface.
• Disable—Disables configuration of the private VLAN edge on the interface.
Actions
The Actions area provides the following information:
•
Commission—This button is used to commission the object manually. This can only be done if the
object is in a decommissioned state. Clicking this button commissions the selected interface.
• Decommission—This button is used to decommission the object manually. In the decommissioned
state, the properties of the object are not monitored. As a result, data displayed in the configuration
window is not guaranteed to be current. Clicking this button decommissions the interface.
ATM/SONET Tab
The following areas are available on the Performance tab of the POS Interface Management window:
• ATM
•
SONET
ATM
The ATM area contains the following information:
• CRC—Cyclical redundancy check (CRC) word size. The CRC is an error-checking technique that
uses a calculated numeric value to detect errors in transmitted data.
• Encapsulation—Indicates whether HDLC or PPP encapsulation is used on the interface.
• Framing—Framing for optical digital transmission. SONET is the North American standard, SDH
is the European standard.
•
Payload Scrambling—Indicates whether or not SONET payload scrambling is enabled on the
interface. Payload scrambling ensures that there is sufficient bit-transition density to maintain the
transmit clock for synchronous signalling. Both ends of the connection must use the same
scrambling algorithm.
• Transmit Clock Source—Source of the transmit clock.
–
loopTiming—Indicates that the recovered receive clock is used as the transmit clock.
– localTiming—Indicates that the transmit clock source is generated internally.