Cisco Systems 17053 appendix Catalyst 8510 and 8540 CSR, Catalyst 6000 and 6500 Switches

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Cisco Catalyst Switch Compatibility and Operation−Specific Issues

These sections deal with specific Cisco Catalyst switch issues that can affect performance, compatibility, and interoperation of certain NICs.

Catalyst 8510 and 8540 CSR

In the campus switch router (CSR) Cisco IOS Software Release 12.0(5)W5(13), autonegotiation for speed and duplex are enabled by default. In earlier releases, autonegotiation is not supported by default. As a result, each connected interface must be set to run in full−duplex mode. If you upgrade to Cisco IOS Software Release 12.0(5)W5(13) with a router that runs in manually full−duplex mode, you experience performance issues. The symptoms include high collision rate, reduced throughput, and more packet drops. This is because the Catalyst 8500 waits to autonegotiate with the connected device. Now that the connected device is forced to run in full−duplex mode, it does not participate in autonegotiation. Based on the specification, this causes the Catalyst 8500 interface to settle in half−duplex mode, which causes a mismatch between the device and the Catalyst 8500 at the interface level. Catalyst 8500 interface defaults to half−duplex mode when the peer is incapable of negotiation.

Catalyst 6000 and 6500 Switches

This table describes Cisco bug IDs found on the Catalyst 6000 and 6500 switches.

Table 7

Cisco Bug ID

Resolved

Description

 

In

 

 

 

 

When a port goes into the

 

 

errdisable state on a Catalyst

 

 

6000 or 6500, the switch

 

 

inadvertently learns the MAC

CSCdm48887

 

addresses of other devices to be

( registered

 

learned from the errdisable

customers only)

5.2.3,

port. The errdisable state is

 

5.3.1a

caused by excessive late collisions

 

 

on a port. Since all traffic on that

 

 

VLAN is forwarded incorrectly out

 

 

of the incorrect port, there is a loss

 

 

of connectivity. This errdisable

 

 

state can appear as a result of a

 

 

duplex mismatch or faulty NIC.

 

 

 

CSCdm80035

 

When a Gigabit connection is reset

( registered

 

on a Catalyst 6000 or 6500, the

customers only)

5.2.3,

connection can potentially not

 

5.3.1a

reconnect. A symptom of this issue

 

 

can be that a Gigabit NIC does not

 

 

connect after reset or disconnect.

 

 

 

CSCdm88013

5.2.3,

Occasionally, host NICs connected

( registered

5.3.1a

to WS−X6248−TEL or

customers only)

 

WS−X6248−RJ−45 modules can

 

 

incorrectly revert to half−duplex

 

 

 

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Contents Prerequisites IntroductionDocument ID RequirementsBackground Information General Troubleshooting for 10/100/1000 Mbps NICsAutonegotiation Valid Configuration Duplex Configuration2Mismatch Correct∙ show port modDport Verifying Physical Connection and LinkMaintaining Link Link Up/Down Situations Verifying Switch Port Configuration∙ show interfaces type ∙ Adjust switch jitter tolerance Understanding Data Link ErrorsPerformance Notes FCS Explanation of CatOS show port Command CountersPossible Causes for Incrementing CatOS Counters Explanation of CatOS show mac Command Counters Sniffer Trace Gigabit Autonegotiation Configuration Table Additional Troubleshooting for 1000BASE−X NICsTeaming of Network Interface Cards Gigabit Autonegotiation No Link to Connected DeviceCatalyst 8510 and 8540 CSR Catalyst 6000 and 6500 SwitchesSet port enable Catalyst 5000 and 5500 SwitchesCatalyst 4000, 2948G, and 2980G Switches Day to once a month. This issue can Catalyst 2950 and 3550 Switches NIC NIC Compatibility and Operation IssuesPage LnkChk to enable. 33921641.2241835 Hardware Panel SystemDevice ManagerPage R2BE/RBE/CBE Physical Interface PHY Control Register Programmable Options Appendix B Understanding How Autonegotiation Works= loopback mode switched on Related Information Networking Professionals Connection Featured Conversations

17053 specifications

Cisco Systems 17053 is a robust and versatile networking solution designed to meet the demands of modern data centers and enterprise environments. This device is part of Cisco's comprehensive portfolio of networking products, offering high performance, reliability, and scalability to help organizations enhance their connectivity and operational efficiency.

One of the main features of the Cisco 17053 is its support for advanced routing protocols, including OSPF, BGP, and EIGRP. These protocols enable seamless communication and data exchange across complex networks, ensuring that information is transmitted swiftly and effectively. This is particularly important for organizations that rely on real-time data and applications, such as financial services or online retail.

In addition to its routing capabilities, the Cisco 17053 boasts powerful security features. It provides robust firewall protection, VPN support, and advanced threat detection and mitigation mechanisms. These security measures help protect sensitive data from unauthorized access and cyber threats, ensuring that organizations can operate safely in today's increasingly interconnected world.

Moreover, the Cisco 17053 is equipped with advanced Quality of Service (QoS) functionalities. This feature allows network administrators to prioritize critical applications and ensure consistent performance even during times of high traffic. By managing bandwidth effectively, organizations can reduce latency and improve user experiences across various applications.

Scalability is another key characteristic of the Cisco 17053. The device can easily integrate into existing networks and expand as organizational needs grow. This modularity allows businesses to adapt their infrastructure without the need for a complete overhaul, saving time and resources.

Additionally, the Cisco 17053 supports various access technologies, including Ethernet and fiber connections, which provide flexibility in deployment. The device is designed to accommodate different network topologies, making it suitable for both small businesses and large enterprises.

Lastly, Cisco offers comprehensive support and services for the 17053, including training resources, technical support, and regular software updates. This dedication to customer service ensures that organizations can maximize their investment and stay ahead in an ever-evolving technological landscape.

In conclusion, the Cisco Systems 17053 is a feature-rich networking solution that combines advanced routing protocols, robust security measures, and exceptional scalability. With its ability to enhance network performance and offer comprehensive support, it stands out as a reliable choice for organizations looking to optimize their networking capabilities.
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