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Cisco SCE 2000 4xGBE Installation and Configuration Guide
OL-7824-07
Chapter 6 Cabling the Line Ports and Completing the Installation
Connecting the Line Ports to the Network
Testing Connectivity: Examining Link LEDs and Counters to Verify that the
Network Traffic is Reaching the Device
If the SCE 2000 platform has been powered up, test now to verify that connectivity has been established
on all links. If the SCE 2000 platform is not powered up, perform this step after starting the SCE 2000
platform.
•
•
How to View the Gigabit Ethernet Port Status, page 6-9
•
How to View the Gigabit Ethernet Counters, page 6-9
Examining the LEDs
The GBE Link LED must be green in order to verify that an active connection exists.
The GBE Rx and Tx LEDs (if flashing green) indicate that traffic is being received or transmitted by the
SCE 2000 platform, respectively.
Note that in an inline topology, the Rx and Tx LEDs indicate that packets are being received/transmitted
by the SCE 2000 platform.
In optical splitter topologies, the Rx LEDs are the sole indicators. The Tx LEDs do not “blink”, since
the Tx is not connected to the port in this topology.
How to View the Gigabit Ethernet Port Status
Step 1
At the SCE# prompt, type
show interfaceGigabitEthernet 0
/
interface-number
.
This displays the port link and auto-negotiation status.
The following example displays a system response.
EXAMPLE:
SCE#show interface GigabitEthernet 0/1
Auto negotiation configured: Enabled
Actual Status:
Link is on
Autonegotiation: Enabled
Bandwidth: 100000Kbps
Burst-size: 50000bytes
Again, auto-negotiation for bump-in-the-wire topology may be enabled or disabled. For receive-only
topologies, using an external splitter, auto-negotiation must be disabled.
How to View the Gigabit Ethernet Counters
In an inline topology, you can monitor traffic via the platform counters for both the Rx and Tx
connections. The counters increase, together with the increased number of packets that flow through the
SCE 2000 for both Rx and Tx.
However, in external switch topologies, the counters for the Tx do not increment, that is, Tx does not
have a function in monitoring traffic, as it is disconnected.
