Fair Queueing on an ISDN PRI

[d.alsn-nilsson]

Is it a good idea to activate Fair Queueing on an ISDN PRI used both for incoming ISDN-calls from users, and for backup-links to remote sites?

Both dialin-users and remote sites use ISDN BRI with multilink PPP and DDR.

On the NAS with the PRI, I use one dialer rotary group for both incoming and outgoing calls.

If I do want to activate Fair Queueing, should I do it on the Dialer interface, the serial 0:15 interface (D-channel), or somewhere else?

/Thanks

[lisa.hall]

Weighted fair queueing is now supported on all interfaces that support Multilink PPP, including MLP virtual access interfaces and virtual interface templates. Weighted fair-queueing is enabled by default.

Fair queueing on MLP overcomes a prior restriction. Previously, fair queueing was not allowed on virtual access interfaces and virtual interface templates. Interleaving provides the delay bounds for delay-sensitive voice packets on a slow link that is used for other best-effort traffic.