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

 

 

 

 

 

 

 

 

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

SCE 2000 4xGBE specifications

The Cisco Systems SCE 2000 4xGBE is a robust solution designed to optimize IP networks and enhance service delivery. As a member of Cisco's Service Control Engine (SCE) product line, this device is particularly suited for service providers looking to manage network traffic, improve service quality, and provide a suite of advanced management features.

One of the standout features of the SCE 2000 is its ability to process and analyze network traffic in real-time. This capability allows operators to gain insights into user behavior, application usage, and overall network performance. By utilizing deep packet inspection technology, the SCE 2000 can identify different types of traffic, enabling network managers to enforce policies and prioritize critical applications effectively.

In terms of interface capabilities, the SCE 2000 offers four 1 Gigabit Ethernet (GbE) ports. This versatility allows for easy integration into existing network infrastructure while ensuring ample bandwidth for data transfer. The device supports both IPv4 and IPv6 protocols, making it future-proof and suitable for evolving network demands.

One of the significant technologies employed by the SCE 2000 is Service Level Agreement (SLA) management. This feature ensures that service providers can meet their commitments to customers by monitoring performance metrics such as latency, jitter, and packet loss. The ability to generate reports based on SLA compliance allows for better customer engagement and transparency.

Additionally, the SCE 2000 facilitates dynamic resource allocation, enabling service providers to adapt network resources based on current demand. This elasticity is crucial in managing peak loads and ensuring a seamless user experience. Furthermore, the device’s support for Quality of Service (QoS) policies ensures that critical applications receive the necessary bandwidth and resources dedicated to maintaining operational efficiency.

The SCE 2000 also emphasizes security with features such as intrusion detection and prevention capabilities, helping protect the integrity of the network. This combination of performance monitoring, traffic management, and security makes the SCE 2000 an invaluable tool for service providers.

In conclusion, the Cisco Systems SCE 2000 4xGBE is a powerful network management solution that excels in providing real-time traffic management, SLA compliance, and security features. Its capabilities make it an essential component for service providers aiming to optimize their networks while delivering high-quality services to their customers.