Cisco 17053 - Manuals

Example for Cisco IOS Software on the Switch − Catalyst 2900XL, 3500XL, 2948G−L3, and6000 that Run Cisco IOS Software show interfaces type Switch# show interfaces fastethernet 0/1 FastEthernet0/1 is down, line protocol is down • States other than connected and line protocol is up indicate a physical...

This is an example: %PAGP−5−PORTFROMSTP:Port 3/3 left bridge port 3/3 %PAGP−5−PORTTOSTP:Port 3/3 joined bridge port 3/3 For Cisco IOS Software−based switches, these messages appear for link up/down situations: %LINK−3−UPDOWN: Interface interface, changed state to up %LINK−3−UPDOWN: Interface interfa...

collisions are normal. Generally, a one percent ratio of errors to total traffic is acceptable for half−duplexconnections. If the ratio of errors to input packets is greater than two or three percent, performancedegradation can be noticed. In half−duplex environments, it is possible for both the swi...

64−byte transmit time occurs. They are onlydetected during transmissions of packets longerthan 64 bytes. Its detection is exactly the same as itis for a normal collision; it just happens later than itdoes for a normal collision. ExcessiveCollisions Excessive collisions are the number of frames thata...

MultipleCollisions This is an indication of a half−duplexconfiguration. LateCollisions This is an indication of faulty hardware (NIC,cable, or switch port) or a duplex mismatch. ExcessiveCollisions This is an indication of overutilization of theswitch port at half−duplex or duplex mismatch. CarrierS...

2 In−Discard and Lrn−Discard do not exist on all Catalyst platforms. Table 5Possible Causes for Incrementing CatOS Counters Counter Possible Cause Delay Exced Severe problem with the switch. Create a service request with Cisco Technical Support. MTU−Exced Verify ISL and dot1q configurations. Verifya...

Teaming of Network Interface Cards Teaming of Network Interface Cards, or NIC Teaming, can cause instability in the networks. Such setups canintroduce disruptions to the Spanning tree and can make it undergo frequent recomputations. If intermittentloss of connectivity to NIC teamed servers occurs fo...

Cisco Catalyst Switch Compatibility and Operation−SpecificIssues These sections deal with specific Cisco Catalyst switch issues that can affect performance, compatibility, andinteroperation of certain NICs. Catalyst 8510 and 8540 CSR In the campus switch router (CSR) Cisco IOS Software Release 12.0(...

after an autonegotiation failure. For detailed information on Cisco bug IDs, refer to the Bug Toolkit ( registered customers only ) . Refer to Cisco Catalyst 6500 Series Switches Release Notes for more Catalyst 6000 and 6500 documentedbug fixes. Catalyst 5000 and 5500 Switches This table lists sever...

WS−X5225R) canresult in speed or duplexmismatches undercertain conditions. Theproblem typicallyoccurs after the moduleis reset or the switchport is disabled andreenabled. Theworkaround is todisconnect andreconnect the cable thatconnects theworkstation to theswitch port. CSCdk32984 ( registered custo...

For detailed information on Cisco bug IDs, refer to the Bug Toolkit ( registered customers only ) . NIC Compatibility and Operation Issues Disclaimer: Use this table as a guide in order to troubleshoot NIC issues. Consult the NIC vendor forverification and proper resolution of the issue. Table 11 NI...

fails. Themotherboards weremanufactured withan Intel Chipset thatare incompatiblewith Cisco switchesand Netgear hubs. IBM 10/100EtherJet CardBusAdapter Extremely slowperformance whenoperating at 10Mbps. Certain 10/100switches implementautomatic correctionfor polarity−reversedcables that are notcompl...

manufacturer patches andutility software areinstalled. Xircom XE2000PCMCIA NIC Does notautonegotiate to 100Mbps, full−duplex. NIC onlyautonegotiates to 100Mbps, half−duplex. Known limitation ofXE2000 NIC. Refer tothe XE2000 releasenotes. Appendix A: Information to Gather Before Creating aService Req...

partner and defaults to half−duplex. As described in Appendix B: Understanding How Autonegotiation Works, pulses within the FLP are used toderive code words that exchange link partner capabilities. The first code word exchanged is referred to as thebase page. It informs each link partner of the mess...