WAN · MPLS CE queuing
Build a full MPLS CE egress queue plan aligned to your carrier's CoS model. Outputs class-map, policy-map, WRED thresholds, shaper, and the DSCP-to-EXP table-map you must agree with the carrier.
MPLS CE routers carry every branch's voice, video, and data. One misplaced class or a mis-sized priority queue and your whole voice quality story falls apart across 80 sites.
The tool produces a parent shaper = CIR and a child policy with LLQ priority for voice, CBWFQ for video, signaling, transactional, and best-effort. WRED is applied to best-effort to prevent TCP global synchronization. Voice is priority-percent so it floats with the shaper.
If voice + video exceeds 50% of CIR, the tool flags over-commit: under burst, business traffic will starve. Either raise CIR or reduce voice/video allocations.
Parent shaper sets the total rate. Child policy is queued on top. On IOS-XE Catalyst 8000 family, HQF (Hierarchical QoS Framework) handles this in hardware. Without a parent shaper, the child policy would fire at the physical port rate and the PE router would police your CIR, dropping whatever exceeds — including voice.
Carriers allow burst up to some Bc/Be value. You want to sit at CIR or slightly under, so bursts of best-effort never touch voice LLQ. The tool uses CIR × 0.95 as shape rate to preserve a 5% safety margin.
On a shaper, always percent — it floats with the shaped rate. On a physical interface without shaping, kbps is fine.
No. Voice is UDP, WRED would just drop packets that are going to be dropped anyway by LLQ policing. WRED goes on TCP classes (best-effort, transactional).
Nest per-VLAN policies inside a parent shaper for total CIR. IOS-XE supports 3-level hierarchies on Catalyst 8000 family.
Voice 15% (30 Mbps) = ~300 concurrent calls. Video 25% (50 Mbps). Signaling 5%. Best-effort 55%. Shape 190 Mbps.
Voice 5% (50 Mbps). Video 25% (250 Mbps). Critical/Business 20%. BE 50%. Shape 950 Mbps.
Map 6 DSCP classes into VZ's EF/AF41/AF31/AF21/AF11/BE equivalents. Voice 10%. Video 20%. Shape 95 Mbps.