![What is Loopback interface in Cisco Router and what is use of loopback interface how to configure Loopback interface What is Loopback interface in Cisco Router and what is use of loopback interface how to configure Loopback interface](https://1.bp.blogspot.com/-XIpygxE83-8/X9Irut4mU3I/AAAAAAAABwc/mdnhe8TqZ30K9pLVZYWuUYev5DwMJnfKgCLcBGAsYHQ/s384/a1.jpg)
What is Loopback interface in Cisco Router and what is use of loopback interface how to configure Loopback interface
![Fred de Jonge | Cisco Router - Site to site configuration on a router with 2 BGP interfaces and 1 Loopback interface with External IP. Fred de Jonge | Cisco Router - Site to site configuration on a router with 2 BGP interfaces and 1 Loopback interface with External IP.](https://freddejonge.nl/wp-content/uploads/2012/05/image1.png)
Fred de Jonge | Cisco Router - Site to site configuration on a router with 2 BGP interfaces and 1 Loopback interface with External IP.
![Configuring IP Addresses on the Loopback Interface - Infoblox NIOS 8.6 - Infoblox Documentation Portal Configuring IP Addresses on the Loopback Interface - Infoblox NIOS 8.6 - Infoblox Documentation Portal](https://docs.infoblox.com/download/attachments/194478180/24.2.png)
Configuring IP Addresses on the Loopback Interface - Infoblox NIOS 8.6 - Infoblox Documentation Portal
Refer to the exhibit. The loopback interface 1 of Router R2 is not appearing in the routing table of R1. Router R1 has all correct configurations. What can be the cause of
![How to configure loopback interfaces on cisco router | Learn Linux CCNA CEH IPv6 Cyber-Security Online How to configure loopback interfaces on cisco router | Learn Linux CCNA CEH IPv6 Cyber-Security Online](https://linuxtiwary.files.wordpress.com/2016/10/loopback-interfaces-tutorial.png?w=648)