How do I fix ORA 12543 TNS destination host unreachable?
How do I fix ORA 12543 TNS destination host unreachable?
Action: Make sure the network driver is functioning and the network is up. Common causes for the ORA-12543 error include: Network driver not functioning. There is a problem resolving the host name given in the address parameter of the tnsnames entry.
Why is destination host unreachable?
A destination host unreachable response could also mean that your Internet Service Provider (ISP) is not giving the router an IP address. You may need to check the Internet connection on your modem. To resolve this, you may need to release and renew the IP address on the computer or set a static DNS address.
How do I resolve TNS destination host unreachable?
Solution:
- Host name resolving problem. Check the hostname mentioned in tnsnames entry exist in /etc/hosts file and you can ping by hostname.
- Network driver not working properly.
- Network is down or experiencing other problems.
- Firewall issues.
- Database server is down.
What does ping t do?
-t = Using this option will ping the target until you force it to stop using Ctrl-C. -a = This ping command option will resolve, if possible, the hostname of an IP address target.
Can you ping a MAC address?
The easiest way to ping a MAC address on Windows is to use the “ping” command and to specify the IP address of the computer you want to verify. Whether the host is contacted, your ARP table will be populated with the MAC address, thus validating that the host is up and running.
How do I find my SQL Plus username?
5 Answers
- Open your SQL command line and type the following: SQL> connect / as sysdba.
- Once connected,you can enter the following query to get details of username and password:
- This will list down the usernames,but passwords would not be visible.
How do I connect to SQL Plus?
To start SQL*Plus and connect to the default database
- Open a UNIX or a Windows terminal and enter the SQL*Plus command: sqlplus.
- When prompted, enter your Oracle Database username and password.
- Alternatively, enter the SQL*Plus command in the form: sqlplus username/password.
What is ping c3?
ping -c option will specify the number of packets sent and will stop after counting them , here in you example count is 3 . Or use man ping in terminal . Try it. will send exactly three ping requests to Google, after which the program terminates.
How do I know if my ping is successful?
You can use the ping command to test name resolution services, too. If you ping a destination by IP address, and the ping succeeds, you know you have basic connectivity. If you ping the same destination by hostname, and it fails, you know name resolution is not working.
Can you track a laptop by MAC address?
Locating a stolen laptop using a MAC address isn’t possible unless the thief gets on the same LAN. This makes recovery unlikely, with the exception of a computer used on a corporate or college network. Supply the MAC address of the laptop and the network administrator can watch for the laptop to log on to the network.
