cisco show port status up down

The issue occurs when Encoded Address Recognition Logic (EARL) is unable to set the CAM aging time for the VLAN to the required number of seconds. 01:05 AM. Descriptions:show interfacescounter. Unknown protocol dropsis a counter on the interface. Description:show interfacesand show interfaces counters errors. << ehxg!UD|_\\zAo*(EJu4Qa-NC-L%;1::Hr3j`39Xg35t!9 You can need to modify your network topology to reduce the traffic load for this switch. Port Overview The Switch Ports section shows a basic view of the status of all switch ports. Rule out any bad patch panel connections or media convertors between source and destination. The purpose of SPD is to ensure that important control packets, such as routing updates and keepalives, are not dropped when the IP input queue is full. No action is required. Unknown hostIf the host does not exist, an unknown host message is returned. Look for broken or lost pins on connectors. 11 0 obj The issue occurs when an excessive amount of traffic is processed by the Fast Ethernet interface. Encryption commands are set crypto key rsa, clear crypto key rsa, and show crypto key. Platform Exceptions:Catalyst Cat4000 Series that run Cisco IOSPrevious to software Version 12.1(19)EW, the giants counter incremented for a frame > 1518bytes. The total number of frames whose transmission attempt is abandoned due to insufficient resources. Interface resets can occur along with the underruns. /Subtype /Link The number of times one collision occurred before the interface transmitted a frame to the media successfully.Common Causes:Collisions are normal for interfaces configured as half-duplex but must not be seen on full duplex interfaces. This is only required if end-devices such as older Gigabit NICs are used which cannot support IEEE 802.3z. In order to resolve this, change the mode of the switch port tostatic accessortrunkas per your requirement. The Pluggable Module provides the flexibility of adding different interfaces to the IR1101 platform, for example, a cellular module. You can use IP ping to test connectivity to remote hosts. Common Causes:Check for a bad cable. /docType () FastEthernet0/0 is up, line protocol is up. Trunking changes the formatting of the packet. Jumbos have larger frame sizes, typically > 9000 bytes. This document covers reasons that STP can fail, what information to look for to identify the source of the problem, and what kind of design minimizes STP risks. The easiest way on Cisco switches is: show int status This will show you the link status for all ports The 45xx line has also some additional useful commands: show int link which will show you the last time the link was active. /Dest (G1029178) This traffic level constrain is due to hardware limitation. You can trace a Layer 2 path by specifying the source and destination IP addresses (or IP aliases) or the MAC addresses. Switches can participate as the source or destination of the traceroute command but will not appear as a hop in the traceroute command output. >> If you use theshow interfacescommand without thestatusoption, you see a setup for speed and duplex, but you do not know whether this speed and duplex was achieved through auto-negotiation or not. /date (2007-05-04T15:24:40.000-07:00) The number of received packets discarded because there is no buffer space.Common Causes:Compare with ignored count. For example, you can look attheMessages and Recovery Proceduresfor Cisco IOS Releases. To stop a ping in progress, press Ctrl-C. To ping another device on the network from the switch, perform one of these tasks in normal or privileged mode: ping -s host [packet_size] [packet_count]. Check the physical connection on both sides. It depends on the amount of the packets that are stored in the Rx FIFO buffer of the module ASIC. The port can be configured to filter 802.1Q tagged frames. If the switch port receives a lot of late collisions, this usually indicates a duplex mismatch problem and can place the port in an errdisable status in a result. The loop guard feature makes additional checks. Description:show interfacescounter. /Type /Annot The show interfaces status cli command shows you all interfaces. 12 0 obj Cisco IOS error counter output forshow interfacesorshow interfaces counters errorsfor the Catalyst 6000 and 4000 Series. A port remembers what VLAN it is assigned to, even if the VLAN itself is deleted. UDLD can put a port in errdisable state when it detects a unidirectional link. Once you know the switch actually has the MAC address of the device in the CAM table, determine whether this device is on the same or different VLAN from where you try to ping. If a port is blocked by Spanning Tree Protocol (STP), most packets are not orwarded, which results in No dest packets. A single broken wire or one shutdown port can cause the problem where one side has a link light, but the other side does not. << STP blocks on the port and prevents any loops (port one receive (RX) goes to port two transmit (TX), and port one TX goes to port two RX). /keywords () An alternative to this command (for Catalyst 6000, 4000, 3550, 2970 2950/2955, and 3750 series switches) is theshow interfacescard-type counters errorscommand which only displays the interface error counters. The rcv-err counter on a 5K only increments as a result of excessive traffic. An SX GBIC needs to connect with an SX GBIC. 2900/3500XL only.The number of times that a port received a packet from the network, but the switch did not have the resources to receive it. Frames that increment at the upper end of this counter can exceedthe 15 collisions and can becounted as Excessive collisions. A switch is in down state when there is nothing connected to the port or if its admin shutdown. View with Adobe Reader on a variety of devices, View in various apps on iPhone, iPad, Android, Sony Reader, or Windows Phone, View on Kindle device or Kindle app on multiple devices, Check the Cable and Both Sides of the Connection, Ethernet and Fast Ethernet Maximum Transmission Distances, Troubleshoot the Most Common Port and Interface Commands for Cisco IOS, Understand the Specific Port and Interface Counter Output for Cisco IOS, Show Controller Ethernet-Controller for Cisco IOS, %INTR_MGR-DFC1-3-INTR: Queueing Engine (Blackwater) [1]: FIC Fabric-A Received Unexpected Control Code, Command Rejected: [Interface] not a Switching Port, Port or Interface Status is Disable or Shutdown, Uplink Port or Interface Status is Inactive, Deferred Counter on the Catalyst Switch Interface Increments, Intermittent Failure to set timer [value] from vlan [vlan no], Use of Switchport Host to Fix Startup Delays, Speed/Duplex, auto-negotiation, or NIC Issues, Deferred Frames (Out-Lost or Out-Discard), Input Errors on a Layer 3 Interface Connected to a Layer 2 Switchport, Rapidly Increment Rx-No-Pkt-Buff Counter and Input Errors, Connectivity Issues due to Oversubscription, Last Input Never from the Output of Show interface Command, Mode-Conditioning Patch Cord Installation Note, Configuring and Troubleshooting Ethernet 10/100/1000 MB Half/Full Duplex Auto-Negotiation, Most Common Port and Interface Troubleshooting Commands for Cisco IOS, Recover Errdisable Port State on Cisco IOS Platforms, Understanding and Configuring VLAN Trunk Protocol (VTP), Configuring Jumbo/Giant Frame Support on Catalyst Switches, Using Portfast and Other Commands to Fix Workstation Startup Connectivity Delays, Troubleshooting Cisco Catalyst Switches to NIC Compatibility Issues, Spanning-Tree Protocol Enhancements using Loop Guard and BPDU Skew Detection Features, Understand and Configure the Unidirectional Link Detection Protocol (UDLD) Feature, Using PortFast and Other Commands to Fix Workstation Startup Connectivity Delays, Configuring and Troubleshooting Ethernet 10/100/1000Mb Half/Full Duplex Auto-Negotiation, Upgrade Software Images and Working with Configuration Files on Catalyst Switches, Technical Support & Documentation - Cisco Systems. The counter also increments when the destination address of the packet is learned on the port that the packet was received on. If not, contact the TAC, as this can be a faulty port. Checking Port Status and Connectivity Download this chapter Checking Port Status and Connectivity Download the complete book Catalyst 4500 Series, Catalyst 2948G and Catalyst 2980G Switches Software Configuration Guide, 7.5 ( PDF - 6 MB) Feedback Table Of Contents Checking Port Status and Connectivity Checking Module Status Checking Port Status If a packet was received on port 0/1, with destination MAC address X, and the switch has already learned that MAC address X resides on port 0/1, it increments the counter and discards the packet. This is because the output queue on that interface is overwhelmed by the excess traffic due to the speed mismatch between the inbound and outbound bandwidths. Therefore, it applies to only process switched traffic. /Type /Annot Description:show interfaces counters errors. When the keepalives are disabled, the CDP enables link to operate normally. The numbers given for multimode fiber-optic cable refer to the core diameter. << << The use of this feature can help you identify difficult to find unidirectional link problems. Swap suspect cable with known good cable. For further information on how to troubleshoot hardware problems on Catalyst switches that run Cisco IOS, navigate to the Cisco Switchessupport pages, choose your platform and look at the Troubleshooting > Hardwaresection. Change the software first. Fast aging temporarily sets the CAM aging time to the number of seconds that the user specifies, and is used in conjunction with the Topology Change Notification (TCN) process. Table 1. 2 0 obj Description:show interfaces counters errors . Port status as seen in the default dashboard color mode. /contentType () The causes for this range from EtherChannel misconfiguration that causes a PAgP flap, duplex mismatch, BPDU port-guard and portfast configured at the same time, UDLD that detects a one-way link, and so on. This ensures that the MAC address table (the CAM table) contains the most recent entries. For more information about how to troubleshoot hardware problems with theshow modulecommand, see the Port or Interface Status is disabled or shutdown or the Hardware Problems sections of this document. Wire Gigabit port one to Gigabit port two. If the port is a secure port, packets with disallowed source MAC addresses are not forwarded and increment the counter. These delays are caused by STP, trunking negotiations (DTP), and EtherChannel negotiations (PAgP). Same behaviour when a PC wakes up from sleep. Number of frames that took longer than two seconds to travel through the switch. /R [41 63 585 621] Other input-related errors can also cause the input errors count to be increased, and some datagrams can have more than one error. New here? Share Improve this question Follow asked Aug 23, 2015 at 6:13 ae41 /Nums [0 32 0 R] An excessive collision happens when a packet has a collision 16 times in a row. Bad or wrong Gigabit Interface Convertor (GBIC). If this counter increments, it is an indication of a wiring problem, an excessively loaded network, or a duplex mismatch. Description:show interfacescounter. If the switch that deleted the VLAN is a VTP server for the VTP domain, every server and client switch in the domain has the VLAN removed from their VLAN table as well. This total includes only those frames that are subsequently transmitted without error and not affected bycollisions. For troubleshoot information, see theDeferred Frames (Out-Lost or Out-Discard)section of this document. The Canonical Format Indicator (CFI) bit in the TCI of an 802.1q frame is is set to 0 for the ethernet canonical frame format. show counters interfaceshow controllers ethernet-controller. Each time we previously disconnected and reconnected the cable the port status just remained down/down. To ping a host in a different IP subnetwork, you must define a static route to the network or configure a router to route between those subnets. Displays Cisco Technical Support information about EtherChannels. << To identify a Layer 2 path, perform one of these tasks in privileged mode: l2trace {src-mac-addr} {dest-mac-addr} [vlan] [detail]. InCisco IOS software you have the ability to automatically re-enable a port after a configurable amount of time spent in the errdisable state. To use this feature, you must install the application on the client accessing the switch and you must configure SSH the switch. The Catalyst4912G, 2948G, and 2980G switches are fixed-configuration switches but are logically modular. /Border [0 0 0] (Line down/up), Layer 2 goes down and then up. - edited For example, if you have two routers connected and you disable CDP on one router interface, this results in unknown protocol drops on that interface. 3506 Giant frames or frames received that exceed the maximum IEEE 802.3 frame size (1518 bytes for non-jumbo Ethernet) and have a bad Frame Check Sequence (FCS). This is useful to know when a dead interface failed. This situation creates a loop. The sum of all errors that prevented the final transmission of datagrams out of the interface.Common Cause:This issue is due to the low Output Queue size. For GigabitEthernet system requirements as well as Gigabit Interface Converters (GBICs), Coarse Wavelength Division Multiplexing (CWDM), and Small Form-Factor Pluggable (SFP) system requirements, refer to these: System Requirements to Implement Gigabit Ethernet on Catalyst Switches, Catalyst GigaStack Gigabit Interface Converter Switch Compatibility Matrix, Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix, Cisco 10-Gigabit Ethernet Transceiver Modules Compatibility Matrix. Follow the below . These random drops are called SPD flushes. 5 minute input/output rate - The average input and output rate seen by the interface in the last five minutes. << /CropBox [0 0 612 792] << >> You have to manually re-enable the port or interface to take it out the errdisable state unless you configure an errdisable recovery option. The number of times the receiver hardware was unable to hand received data to a hardware buffer. When you operate at half-duplex setup, some data link errors incrementin Frame Check Sequence (FCS), alignment, runts, and collision counters are normal. /Count 14 In the example, under the show interfaces FastEthernet0/1 command, look at a line that shows something such as: Last input 00:00:41, output 00:00:00, output hang never. In its operation, STP relies on continuous reception or transmission of BPDUs based on the port role. SSH is supported for remote logins to the switch only. The total number of frames which are filtered because of the type of VLAN information contained in the frame. >> It is counted with short traffic bursts flow when some packets fill this buffer. /P 6 0 R Description:The number of times that the transmitter has been that run faster than the switch can handle.Common Causes:This can occur in a high throughput situation where an interface is hit with a high volume of traffic bursts from many other interfaces all at once. The error message is received when the traffic level reaches about 2.5 Mb. Refer toCisco Technical Tips Conventionsfor more information on document conventions. /Creator (FrameMaker 7.2) Switch#show inter status. 10 0 obj /Border [0 0 0] This message indicates to the traceroute facility that it has reached the destination. Note: There can be differences in the implementation of the counters across various platforms and releases. Late collisions are not detected by the transmitter until after the first 64 byte slot time. Although the values of the counters are largely accurate, they are not very precise by design. >> Description:sh interfacescounter. 5. 3. The traffic load on the interface is excessive and causes the frames to be discarded. The number of times the carrier was not present in the transmission.Common Causes:Check for a bad cable. Common Causes:This includes runts, giants, no buffer, CRC, frame, overrun, and ignored counts. ', Switch#show dtp interfaceDTP information for FastEthernet1/0/1: TOS/TAS/TNS: ACCESS/AUTO/ACCESS TOT/TAT/TNT: UNKNOWN/NEGOTIATE/UNKNOWN Neighbor address 1: 000000000000 Neighbor address 2: 000000000000 Hello timer expiration (sec/state): never/STOPPED Access timer expiration (sec/state): never/STOPPED Negotiation timer expiration (sec/state): never/STOPPED Multidrop timer expiration (sec/state): never/STOPPED FSM state: S1:OFF # times multi & trunk 0 Enabled: no In STP: no, Statistics ---------- 0 packets received (0 good) 0 packets dropped 0 nonegotiate, 0 bad version, 0 domain mismatches, 0 bad TLVs, 0 bad TAS, 0 bad TAT, 0 bad TOT, 0 other 0 packets output (0 good) 0 native, 0 software encap isl, 0 isl hardware native 0 output errors 0 trunk timeouts 1 link ups, last link up on Mon Mar 01 1993, 00:01:37 1 link downs, last link down on Mon Mar 01 1993, 00:03:13, The "sh dtp interface" command shows the same date for all interfaces.

Glock 19 Ejector Upgrade, My Husband Thinks I'm Always Mad At Him, How To Repeat Messages On Iphone With Shortcut, Articles C