LAN Switching Foundation Technologies

Manual Conversion from Native to Hybrid Although an automated tool exists for converting both the configuration commands and software from hybrid to native, Cisco does not offer automated tools to convert from native to hybrid. Users can be challenged with converting ... [full story]

Manual Conversion from Hybrid to Native The manual process for converting from hybrid to native using a Supervisor II with an MSFC2 is outlined in the following steps. This process can be used with other Catalyst 6000/6500 Supervisor/MSFC combinations using the ... [full story]

Automated Conversion Tools The configuration conversion tool is available as a link from the Software Center page on cisco.com. This tool allows users to paste in the configuration of a switch running Catalyst OS and see the resulting command equivalents under ... [full story]

SPAN/RSPAN Session Based on Hardware Feature Catalyst 4000 Range of Switches Catalyst 5000 Range of Switches Catalyst 6000 Range of Switches Rx or both SPAN sessions 5 1 2 Tx SPAN sessions 5 4 4 Rx, Tx, or both RSPAN source sessions 5 Not Supported 1 RSPAN destination 5 Not Supported 24 Total Sessions 5 5 30 [full story]

SPAN Features and Associated Software Release Feature Catalyst 4000 Catalyst 5000 Catalyst 6000 Inpkts enable/disable option 4.4 4.2 5.1 Multiple sessions, ports in different VLANs 5.1 5.1 5.1 Sc0 option X 5.1 5.1 Multicast enable/disable option X 5.1 5.1 Learning enable/disable option 5.2 5.2 5.3 RSPAN 6.3 X 5.3 Table 12-3 illustrates the number of SPAN sessions that can be configured on the appropriate platform. [full story]

Original Setup of a Router Connected to a Switch Switch1 has a source host, and Switch2 has a RSPAN destination port defined, as follows:Step 1. Define the VLAN used for RSPAN on the appropriate switches. Here, VLAN 4 is used: ... [full story]

Remote Switched Port Analyzer Unlike Local SPAN, Remote SPAN (RSPAN) allows for the SPAN destination port to be anywhere on the Layer 2 network. This can potentially help save time because the network engineer does not have to worry about placing ... [full story]

Using the Create OptionSwitch1 (enable) set span 1/2 10/1 Switch1 (enable) set span 10/2 10/11 create [full story]

Monitoring a TrunkSwitch1 (enable) set trunk 10/1 isl Port(s) 10/1 trunk type set to isl. Switch1 (enable) set trunk 10/1 desirable Port(s) 10/1 trunk mode set to desirable. Switch1 (enable) set span 1/2 10/1 ... [full story]

SPAN Filtering EnabledSwitch1 (enable) set span 10/3-5 10/1 filter 3 Destination : Port 10/1 Admin Source : Port 10/3-5 Oper Source : Port 10/3 Direction ... [full story]

Monitoring VLAN 3Switch1 (enable) set span 3 10/1 Destination : Port 10/1 Admin Source : VLAN 3 Oper Source : Port 10/24,10/47,15/1 Direction ... [full story]

Monitoring Multiple PortsSwitch1 (enable) set span 10/3-5 10/1 Destination : Port 10/1 Admin Source : Port 10/3-5 !List of all ports that are monitored Oper Source ... [full story]

Local Switched Port Analyzer Switched Port Analyzer (SPAN) allows for a protocol analyzer such as a sniffer to passively inspect traffic generated by a VLAN(s) or specific source port(s). SPAN is flexible enough that the source can be a single port ... [full story]

Using Trace Trace on a switch is equivalent to enabling debugging on a router. It is, however, a resource drain that can potentially crash a switch. In rare situations where syslog messages, protocol analyzers, and pursuing other avenues for potential explanation ... [full story]

Configuring Logging on the SwitchSwitch1(enable)set logging server enable Switch1(enable)set logging server 10.1.1.1 Switch1(enable)set logging level spantree 6 default Switch1(enable)set logging server severity 6 [full story]

Using Syslog Messages Syslog messages provide a wealth of information as to the possible root cause of the outage by generating, for the most part, meaningful messages such as the reload of module or shielded twisted-pair (STP) root change, and so ... [full story]

Examining Port FieldsSwitch1 (enable) show port 10/3 * = Configured MAC Address Port Send FlowControl Receive FlowControl RxPause TxPause admin oper ... [full story]

Understanding Port Errors Typically, at the port level, you are interested in Layer 1 and Layer 2 errors. Some of the common errors are bad cable, alignment issues, frame check sequence (FCS), and collisions seen on the port. Example 12-9 shows ... [full story]

MSFC Missing The same logic and reasoning that was used in troubleshooting Supervisor modules applies here as well. The first thing to do when the MSFC disappears is to console into it. The switch console command, running Catalyst OS software, allows ... [full story]

Supervisor FailureModule 1 Earl VI Status : NewLearnTest: F ... [full story]

Supervisor LED LED Color/State Description STATUS Green All diagnostics pass. The module is operational (normal initialization sequence). Orange The module is booting or running diagnostics (normal initialization sequence). An overtemperature condition has occurred. (A minor temperature threshold has been exceeded during environmental monitoring.) Red The diagnostic test failed. The module is ... [full story]

Supervisor Missing One of the more frustrating troubleshooting events is when a Supervisor disappears from the chassis. It is usually the standby Supervisor. To fix the problem, you must have console access to the Catalyst switch. Typically, a bad configuration is ... [full story]

The show top OptionsSwitch2 (enable) show top ? Number of physical ports (default ... [full story]

show scp Command OutputSwitch2 (enable) show scp Show scp commands: ---------------------------------------------------------------------------- show scp failcnt Show SCP fail count show scp mc ... [full story]

Switch Environmental LevelsSwitch2 (enable) show environment all Environmental Status (. = Pass, F = Fail, U = Unknown, N = Not Present) PS1: . PS2: N PS1 Fan: ... [full story]

Diagnostic OptionsSwitch2 (enable) set test diaglevel ? complete Complete diagnostics minimal ... [full story]

Checking Test Results for Module 3Switch2 (enable) show test 3 Diagnostic mode: minimal (mode at next reset: complete) Module 3 : 48-port 10/100BaseTX Ethernet Line Card Firmware Status for Module 3 : PASS ... [full story]

Modules Currently Installed on the SwitchSwitch2 (enable) show module Mod Slot Ports Module-Type Model ... [full story]

Checking Hardware Components After verifying that no issues can be found in software, check the hardware modules to ensure proper functioning. A physical check of the hardware can be helpful in situations where the hardware has failed. Sometimes, a faulty module ... [full story]

Switch Software InformationSwitch2 (enable) show version WS-C6506 Software, Version NmpSW: 7.6(3a) Copyright (c) 1995-2003 by Cisco Systems NMP S/W compiled on Sep 24 2003, 18:13:40 System Bootstrap Version: 5.3(1) System Boot Image File is 'bootflash:cat6000-supk8.7-6-3a.bin' ... [full story]

Checking Software Versions One of the most important steps in troubleshooting a Catalyst switch is to determine the software that it is running. The software version provides a wealth of information in many troubleshooting cases: Check whether the switch code is General ... [full story]

Catalyst 3750 Redundancy The Catalyst 3750 switching platform is capable of high availability by design, given the stackable architecture. You can stack and interconnect up to nine switches in a self-healing ring. Failover on the 3750 series is less than 1 ... [full story]