What are the usual issues when an interface (ethernet) is in an UP/DOWN status . Port Name Status Vlan Duplex Speed Type . Solved: Port status up and down and up again - Cisco Community R2#show inter fa 0/0. 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. What can cause "FastEthernet is up, line protocol is down" on a Cisco ... This is not available on all IOS versions. Troubleshooting "Line Protocol is Down" Problems on POS Interfaces - Cisco sw#show run int g10/17 Enter both the module number and the port number to see detailed information about the specified port. my_switch (config) #no logging console. This shows the last time a port sent or received traffic. They generally refer to whether Layer 1 is working (line status) and whether Layer 2 is working (protocol status). . Right now, this 10G port is connected to a NIC in a PC, but there is no traffic going in or out. TDR detects a cable fault by sending a signal through the cable and reading the signal that is reflected back. It is really useful on cases like mine where you don't know the mac or IP addresses. Find A Community. Description: This command lists a condensed one line for each logical and physical interface. Show activity on this post. (Line down/up) Layer 2 goes down and then up. [SOLVED] Cisco Status "Monitoring" - Spiceworks Community Troubleshooting Switch Port and Interface Problems - Cisco Hope that helps. Specify a particular module number to see information on the ports on that module only. Helpful Votes. Hardware is AmdFE, address is 000e.8485.8820 (bia 000e.8485.8820) . PDF Checking Port Status and Connectivity - Cisco (Protocol down/up) The switch will reflect that behaviour and you'll see a link go down/up two times. my_switch (config) #logging console. Port on switch down/down (notconnect) - Cisco Cisco ethernet interfaces are normally down / down if they don't have a link. . Jun 18th, 2021 at 7:58 AM. The interfaces that are "up" are in the connected state. Guidelines The following guidelines apply to the use of TDR: Just issue the command "show monitor" and remove the commands for the SPAN session and the port will then be returned to the "connected" state. thumb_up 148. Command: show ip interface brief. FastEthernet0/0 is up, line protocol is up. The show interfaces status cli command shows you all interfaces. Fa0/1 connected 1 a-full a-100 10/100BaseTX . PDF Checking Port Status and Connectivity - Cisco [SOLVED] Cisco Status "Monitoring" - Spiceworks Community To see summary information on all ports on the switch, enter the. I just bought a Cisco 3750X switch and when I did a sh ip int brief command, I see that my TE1/1/1 interface (it's a 10G port) has status up but protocol down. If you're seeing up / down, the most likely causes are: Cable fault; Speed mismatch (I personally haven't seen a duplex mismatch bring an intf up / down) is cable that connected to the local interface, but not connected to the far end switch, will cause that situation? 35 Important Cisco Show Commands You Must Know (Cheat Sheet PDF) Additional tabs include: . Checking Port Status and Connectivity - Cisco check 87. LAN switch interfaces typically show an interface with both codes with the same value, either . show interface status - Cisco How can we find out what is plugged in to the port. 05-11-2020 01:03 AM. Best Answers. Interface flapping up and down - Cisco LAN switch interfaces typically show an interface with both codes with the same value, either . Cisco Switches Interface Status Codes - takistmr.com Next thing - there should be no green light if the link is down . Gi2/0/5 up down Wireless AP 116 show int status Gi2/0/4 Wireless AP 114 connected 195 a-full a-1000 10/100/1000BaseTX . UP/DOWN Status - Cisco Community Interface status codes - Study CCNA You could try and set the keepalive timer on your switchports to something higher than the highest interval seen in your logs, say 20 minutes. I usually use "show interface status" and variations on it but I also use a neat piece of open-source software called "Switchmap" to provide a simple graphical view of the interfaces. iam away from datacenter. not sure on cat9K but enter "no shutdown". DOWN = Protocol. show interfaces status command with no arguments. The | include connected shows only the lines of the output that contain the word "connected". For example, I have an IBM Switch EN94093R that does it by default, when I unplug and then plug again a cable from the switch, it shows up on the SSH/Telnet session instantly, as shown below: Is there a similar way to do this on the Cisco Switch? 2. I usually start first with the following command: Switch0# show interfaces status Port Name Status Vlan Duplex Speed Type Fa0/1 connected 1 auto auto 10/100BaseTX Specify a particular module number to see information on the ports on that module only. my_switch (config) #logging console. Cisco Status "Monitoring" Posted by StPaddy. I just bought a Cisco 3750X switch and when I did a sh ip int brief command, I see that my TE1/1/1 interface (it's a 10G port) has status up but protocol down.

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