I need to know what is diffent between cisco and microsoft loopback ?
Please help me..
the microsoft loopback is part of the TCP/IP stack and allows to test services like a web server using fixed ip address 127.0.0.1 or even as a way to perform some processing.
On a cisco router there can be multiple loopback interfaces with multiple IP addresses not limited to 127/8
A loopback interface in a cisco router or multilayer switch is a logical interface that is always on until the device is alive.
For this reason a loopback interface IP address is usually used as router-id in dynamic protocols like OSPF, BGP (and EIGRP) it provides consistency over time and does not depend from the state of a specific interface or of a specific group of interfaces.
until a network device has at least one physical interface connecting to the rest of the network its loopback address can be reached and this is very handy for iBGP sessions, LDP targeted sessions, L2TPv3 sessions and so on
Hope to help