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    Here are some easy-to-follow methods that can help you troubleshoot with the switch Port Troubleshooter.

    Make sure the port or module is not disabled or powered directly for some reason. If the transport or module is manually closed by either side of the connection, the connection will not be fully established until we enable the port again. You check the port’s two-way popularity.

    In this tutorial we will see how to solve various problems with the interface. Let’s look at a few scenarios…

    Duplex Printing And Speed Issues

    In this example, we reach the switch in the middle and therefore the two computers that are currently connected to it. Each computer has an IP address and must be well located to ping each other. We assume that the computers are configured and correct, there are no problems. Let’s ping:

    C:Documents try settingssh1>linked ping 192 to .168.1.2Ping with De 32 exceeded:data polling bytes.Request timed out.Request timed out.Request timed out.Ping statistics for   Packets: sent = d, received = 0, = lost = d of 100%), (loss 


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    Unfortunately, our pings never work. What is the first thing people in the world check? whole Our interfaces need to be on the right track!

    SW1#show interfaces fa0/1FastEthernet0/1 line design failed, connection failed (noI)  Fast Ethernet hardware, address probably 0011 will be.bb0b.3603 (except 0011.bb0b.3603)  MTU 1600 bytes BW, 100000 Kbps, DLY a Usec,     Plausibility Txload 255/255, 1/255, rxload 1/255  ARPA encapsulation, indefinite loop Activity confirmation (10 sec.)  Half duplex, automatic speed type, 10/100BaseTX media  Version flow control is disabled, output flow control is not supported.  Enable ARP: ARPA, ARP timeout 04:00:00  Last at 00:26:47, 00:19:17, exit never publish Last clear counters "Show UI"  Ruler: 0/75/0/0 (size/max/drops/plums); Overall performance drop: 0  Queue policy: fifo Output queue: 0/40 (size/max)  5 input speed multiple instants 0 2 bps, packets/s  5-minute output rate 3 bits/sec, 0 packets/sec     3457 incoming packets, 309301 bytes, 6 unbuffered     Received 2407 broadcasts (1702 multicasts)     4 tracks, 0 giants, 0 controllers     0 input error, three CRCs, 0 frame, 0 overflow, 5 missing    two watchdog timers, multicast 1702, 0 temporarily stop input     0 Expertise Packs found with dribbling status     resultt 42700 packets, 8267872 bytes, 0 underruns     0 output errors, collisions, 1 interface reset     0 chatter, 0 long collision to cancel, 0 left with delay     0 lost carrier, 0 no random carrier, output 0 PAUSE     0 output buffer blocked, 0 output buffer replaced

    FastEthernet 0/1 usually points down. This may indicate a layer 1 problem such as a bad faulty cable, a cable (crossover instead of straight) or possibly an inappropriate network card. Pay attention to the interface that half-duplex worked on. If you’re lucky, you can get almost any duplex message through CDP describing that you have another duplex mismatch. If you’re sad, it’s that your possible interface is decreasing. Remember that the gigabit interface doesn’t support half duplex. Let’s set up Auto Duplex:

    SW1(config)#interface on fa0/1SW1(config-if)#auto will enable duplex

    I’m auto-duplexing it so the switch can easily provide it for itself.

    troubleshooting a switch port

    sw1#%link-3-updown: The FastEthernet0/1 interface you modified indicates that%LINEPROTO-5-UPDOWN: Line PROTO  l on interface FastEthernet0/1, state changed to 

    I hope it’s better! Try pinging another one called (maybe we’ll be lucky):

    C:Documents and SettingsH1>ping 192.168.1.with 32 2 bytes pointing synced on data:exit request.Request timed out.Request timed out.Ping numbers for    Packets: = 4 sent, 0 received, lost = (100% 4 lost),

    Unfortunately, ping is not used. Let’s take a look at the interface that H2 is playing:

    SW1#show fa0/3Failure of FastEthernet0/3 interfaces directly, failure of the line protocol (no connection) this is Fast Ethernet equipment, descriptor 0011.bb0b.3605 (bia 0011.bb0b.3605)  1900 MTU BW bytes, 10000 kbps, DLY 1000 µs,     Reliability 255/255, txload 1/255, rxload 1/255  ARPA encapsulation, barely defined loop  Activity confirmation (10 sec.)  Auto-Duplex, 10 Mbps, media type - 10/100BaseTX random Input flow control yes, output flow control not supported  ARP Type: ARPA, ARP Timeout 04:00:00  Last I/O 00:38:09, 00:01:42, product never crashes  Last payment counters "Show interface" ever  Entry queue: 0/75/0/0 (size/max/drop/drain); Overall performance drop: 0  Queue policy: fifo Output queue: 0/40 (size/max)  just a few minutes Input rate bps, 0pps  0 resulting speed 5 minutes bps, 0 packets/s     1908 return packets, 181819 bytes, 0 no buffer     Received 858 messages (826 multicasts)     9 tracks, 0 giants, 2 controllers     error 0 content, 0 CRC, 0 frame, 7 overflow, 0 missing     0 watchdogs, 826 group addresses, 1 pause input     Dribbling Disease Zero Entry Packets Detected du Output 46861 blocks, 9365341 bytes, no skipped     0 performance errors, 0 crashes, 1 connection reset     6 babbles, 0 late collisions, 0 delays     0 carrier loss, 0 no carrier, 0 PAUSE output     0 causes buffer errors, 0 output buffers have been swapped
    troubleshooting a switch port

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    This is far from glowing when more actively connected to the computer, but is usually a good sexual indicator that something is wrong, and see forwhether the indicator is on or whether you have a network connection.

    check interface status The Show command provides none of the interfaces, one of the arguments. Specify a specific course number to display information only for a specific input port of that module. Specify both the port number and the module number of the port to display detailed notes on the specified port.

    Log in to your current switch.Run the activation command.Run the "Station" command and configure the .Interfacerun (replace the port ID with the port ID of the port you want to support).run the "no shutdown" startup-config", running-config to save changes.