Hello Vjnetwork
The fundamental difference between the two options is this:
- The
priority percentcommand will reserve bandwidth based on the absolute total value of bandwidth available. - The
priority remaining percentcommand will reserve bandwidth based on the relative available bandwidth.
What’s the difference? The priority percent command will always calculate its value based on the absolute value of the bandwidth, that is, the interface bandwidth. The priority remaining percent command will calculate its value based on the remaining bandwidth. The remaining bandwidth is a dynamic value, and this is at the very center of the difference between the two methods. That remaining value can have a maximum of 75% of the absolute bandwidth available but may change dynamically because the remaining bandwidth also includes whatever “free” or unused bandwidth there is from other classes.
For more information on the command, with further explanations of the differences, take a look at this Cisco documentation:
https://www.cisco.com/c/en/us/td/docs/ios/qos/command/reference/qos_book/qos_a1.html#wp1038764
I hope this has been helpful!
Laz