Modular QoS Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Release

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Modular QoS Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Release

Queuing policy for main interfaces

Updated: June 9, 2026

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After you set the chassis to 8xVOQ or 4 xVOQ, every main interface automatically receives the default traffic-class queue hierarchy.

After you set the chassis to 8xVOQ or  4xVOQ (see  Switch the Queuing Mode on the Router), each main interface automatically receives the queue hierarchy described here.
Use this information to verify how each internal traffic class is handle and to decide whether you need a custom egress-queuing policy on the main interface.

The 8xVOQ configuration allocates: P1 to TC 7, P2 to TC 6, and PN0–PN5 to TC 5 through 0. (See Queuing modes)

Next steps:

  • If the default priority and bandwidth distribution is acceptable, no further action is required.

  • To change scheduling weights, shaping rates, or WRED profiles, create an egress queuing policy and attach it to the main interface (see Attach a Queuing Policy to an Interface).