Bright Haven Electric LLC

Bright Haven Electric LLC
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Network Traffic Engineering & QoS: Technical Architecture

Network Traffic
Engineering & QoS

Bright Haven Electric architects end-to-end traffic engineering solutions to guarantee bandwidth, minimize latency, and ensure the flawless delivery of mission-critical applications.

Beyond Simple Bandwidth Limits

Moving beyond rudimentary FIFO queuing, we implement deep queuing disciplines and packet marking directly from the internal switching core to the edge firewall for absolute congestion control.

End-to-End Traffic Control

Engineering deterministic pathways for real-time and bulk data payloads.

CoS & Packet Marking

To prevent network congestion from degrading time-sensitive applications, traffic must be categorized and prioritized the moment it enters the network.

  • Hardware-Level Classification: Implementation of ingress classifiers on enterprise switching hardware (e.g., Juniper EX-Series) to identify traffic types based on source VLAN, IP, or protocol, placing them into specific forwarding classes (fc-critical, fc-media, fc-gaming, fc-scavenger).
  • DSCP Rewrite Rules: Configuration of hardware rewrite rules to inject standard Differentiated Services Code Point (DSCP) tags into the IP header of every packet. This ensures downstream routers and firewalls instantly recognize the packet's priority level (e.g., Expedited Forwarding ef for critical VoIP, cs3 for media, cs1 for scavenger data).

Schedulers & Priority Queues

Once classified, traffic is managed by strict scheduling algorithms to govern how switch buffers and backplane bandwidth are allocated under heavy load.

  • Strict-High Priority Queuing: Mission-critical traffic and real-time data (VoIP, control plane signaling) are assigned to strict-high priority queues, guaranteeing immediate transmission ahead of all other traffic to eliminate jitter.
  • Weighted Bandwidth Allocation: Non-critical forwarding classes are governed by precise scheduler maps. We allocate guaranteed transmit rates and buffer sizes (e.g., reserving 30% for media streaming) while strictly throttling background tasks (e.g., limiting scavenger traffic like backups to 5%), preventing bulk transfers from inducing bufferbloat.

Stateful Edge Shaping

ISP-provided hardware often utilizes rudimentary FIFO queuing, resulting in massive latency spikes when a WAN connection is saturated.

  • Artificial Bottlenecking: We configure the edge firewall (OPNsense) to artificially cap total ingress and egress bandwidth slightly below the physical link capacity. This forces the enterprise firewall to handle packet queuing rather than the ISP modem.
  • Stateful Queue Matching: The firewall intercepts outbound and inbound packets, reading the DSCP tags applied by the core switch. Traffic is placed into corresponding shaped pipes (qCritical, qMedia, qBrowsing) with weighted distribution, ensuring that a saturated download does not crush concurrent critical uploads.
  • Compute-Level Congestion Control: At the server and container level, we tune the host OS network stack utilizing advanced TCP congestion control algorithms like TCP BBR (Bottleneck Bandwidth and Round-trip propagation time) and fq (Fair Queueing) to ensure smooth packet pacing and optimal throughput over high-latency or fluctuating transit links.

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QoS & Traffic Engineering Logs

Browse our recent technical updates regarding routing capacity, DSCP policies, and scheduler deployments.