Cisco 3524-PWR - Catalyst XL Enterprise Edition Switch Guía de instalación descargar pdf (Pagina 15)

Overview 1-15

LEDs

Interpreting LEDs after a Mode Change

When you change port modes, the meaning of LED colors also changes. Table 1-5 explains

how to interpret the LED colors after you change the mode.

Table 1-5 Meaning of LED Colors in Different Modes

Port Mode LED Color Meaning

STATUS (port status) Off No link.

Solid green Link present.

Flashing green Activity; port is transmitting or receiving data.

Alternating green-amber Link fault. Error frames can affect connectivity, and errors

such as excessive collisions, CRC errors, and alignment and

jabber errors are monitored for a link-fault indication.

Solid amber Port is not forwarding. Port was disabled by management or an

address violation or was blocked by Spanning-Tree Protocol

(STP).

Note After a port is reconﬁgured, the port status LED can

remainamberforupto30 seconds as STPchecks the switch for

possible loops.

UTL (utilization) Green The LEDs display backplane utilization on a logarithmic scale.

If all port status LEDs are green, the switch is using 50% or

more of its total bandwidth capacity. If the right-most LED is

amber, the switch is using less than 50% of its total bandwidth.

If the LED to the left of the right-most LED is amber, the

switch is using less than 25% of its total capacity, and so on.

See Figure 1-10, Figure 1-11, and Figure 1-12 for details.

DUPLEX Off Port is operating in half-duplex.

Green Port is operating in full-duplex.

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Cisco 3524-PWR - Catalyst XL Enterprise Edition Switch Guía de instalación Pagina 15