What does it mean when an interface is down down?
When the status of the show interfaces output lists down/down (shorthand to mean that both status values are “down”), tWhen the show interfaces status command should also list a matching state of “notconnected”. But can you make a list of all things that cause this status?
What is the serial interface router?
Typically Serial ports are used to connect routers together and the Gig/FA ports on the router connected it to a switch. You can buy modules to add more ports to a router if space is available.
What is the first step when troubleshooting a serial link?
What should be your first step in troubleshooting the problem? Check the cable connector on the router. You are troubleshooting the Frame Relay configuration of your router. RouterA should be able to communicate with RouterB over the WAN link.
How do I find the serial interface on a Cisco router?
Use the show interfaces serial privileged EXEC command to display information about a serial interface.
How do I fix an ERR disabled port?
To recover a port that is in an Errdisable state, manual intervention is required, and the administrator must access the switch and configure the specific port with ‘shutdown’ followed by the ‘no shutdown’ command.
How do you troubleshoot link down issues?
Check for the Physical damage on the cable. Check if the cable used is of is correct type such as cat5,cat6. Try using a known working cable between the devices….Troubleshoot physical port flap or link down issues.
- All PaloAlto Hardware-based Firewalls.
- PAN-OS 7.1 and above.
- Copper or Fiber media types.
Is Ethernet faster than serial?
Ethernet is a faster, more reliable, and more flexible communication technology than serial. Depending on the specifications of your computer, you may experience communication problems with a serial network, in which case you will have to use an Ethernet network.
How do you turn on a serial port?
To configure the Serial Port for your device, on your computer go to Control Panel – Device Manager, select “High-Speed USB Serial Port (Com X)”, right click and select Properties. Click the Features tab. This tab is used to change the COM port number and configure the port.
What happens when an HSRP active router fails select two?
Terms in this set (15) What happens when an HSRP active router fails? (Select two.) The HSRP standby router becomes the active router after the holdtime expires on the hello message. Additional HSRP member routers transition from the listen state after the holdtime expires on the hello message.
What effect does the standby 2 track serial 0 0 25 interface configuration command have?
What effect does the “standby 2 track serial 0/0 25” interface configuration command have? Router A will become the standby router if the Serial 0/0 interface fails. You have two routers, router A and router B, which should be configured for gateway redundancy. Which of the following is true?
How do I know if my Cisco router is working properly?
To test if your router is working, try to ping one computer using another computer in the same network. You should be able to do this if the router is working properly. Your computer’s firewall must be disabled as well. To learn more on how to check the computer’s connectivity with the router, click here.
What is the serial interface of the 0/1/1?
Router#sh interfaces serial 0/1/1 Serial0/1/1 is up, line protocol is down Hardware is WIC MBRD Serial Description: $van interface $ Internet address is 117.239.xx.xx/30
When the line protocol is down the debug serial interface output indicates?
When the line protocol is down, the debug serial interface command output will indicate that keepalive counters are not incrementing. Step 6 Place the CSU/DSU in local loop mode again.
Why is my serial interface showing as unknown?
Serial interface 1 has no cable attached. Figure 15-4 shows the output of the show controllers mci command. This command is used on AGS, CGS, and MGS routers only. If the electrical interface is displayed as UNKNOWN (instead of V.35, EIA/TIA-449, or some other electrical interface type), an improperly connected cable is the likely problem.
How do I use the show interfaces serial command?
This section covers the show interfaces serial command’s parameters, syntax description, sample output display, and field descriptions. To display information about a serial interface, use the show interfaces serial privileged exec command: • Number — (Optional) Port number.