Cisco Systems SCE 2000 4xGBE manual Troubleshooting the Link Interface Subsystem

Chapter 8 Troubleshooting

Problem Solving Using a Subsystems Approach

Troubleshooting the Link Interface Subsystem

Check the following to help isolate a problem in the link interface subsystem.

In general, the case where no traffic is coming out of the SCE 2000 is often caused by link problems or GBE interface configuration. Note that in some cases, the problem which seems as a transmit problem could be in the Rx (no traffic is being received by the SCE 2000 or there is actually no traffic on the line, which could be a normal situation).

Note In CLI commands of GigabitEthernet interfaces, # stands for the number of the interface. This can be 1 through 4.

Problems in the link interface subsystem could be any of the following:

•Link is down. (LINK LED not lit and system status is WARNING)

•Peer does not receive traffic from SCE 2000 (GBE link is lit and Tx LED is flashing)

•GBE link is up but not receiving from peer (GBE link is lit, but Rx LED is not flashing)

		Table 8-7	Troubleshooting the Link Interface Subsystem
		Symptom	Diagnostic Action	Possible Cause	Possible Solution
	• Link is down. (LINK		CLI command:	Connector is not connected to	Reconnect the cable to the GBE
		LED not lit)	• show interface	the platform or to the network	port and to network.
	• Status is WARNING		GigabitEtherne
		(Status LED is	t 0/# counters
		flashing orange)
	• Output counters not
		incrementing.
				GBE cable is broken	Reconnect / replace the cable to
					the GBE port.
					If GBE counters are
					incrementing, this indicates
					LED problem. Contact customer
					support.
			Check output of show	Auto-negotiation may be	Check auto-negotiation
			interface	incorrectly configured.	("Configuring the GBE
			GigabitEthernet		Interface Parameters" on page 6-
			0/# counters		7) configuration in the SCE
			command for: “In		2000 and in its peers.
			good unicast packet”
			and “Out unicast
			packet”. These
			counters should be
			constantly
			incrementing.
		SCE 2000 4xGBE Installation and Configuration Guide
8-14					OL-7824-02