I have 10mbit metro ethernet from my ISP for the internet that goes into a
FE interface on a Cisco 2691 router. Should I use fair-queue on that
interface or not?
Would I also use, or no tuse, fair-queue on the other FE interface on the
router which is my side of the circuit?
Are you asking about just turning on "fair-queue" under the interface?
What is your requirement for which you are planning to turn this on?
Note that the "fair-queue" command under the interface was designed for
low-speed serial links and will not scale on the high-speed interfaces
you are asking about.
Have you looked into Class-based Weighted Fair Queuing (CBWFQ)? That
might be more applicable to your QoS needs. Take a look at