Reference Deployment Model · Hyperscale Indian ISP · BNG · CGNAT · QoS · NOC
Reference Model · India Tier-1 ISP ILLUSTRATIVE
How a Hyperscale Indian ISP Runs on BNGSOFT
India's broadband leaders serve subscribers at a scale almost no one else does — JioFiber leads fixed-wired at ~14 million, with 5G FWA (JioAirFiber / Airtel AirFiber) adding millions more. This is an illustrative reference model of how an operator at that tier — say ~20 million home + FWA broadband subscribers — would run BNG, CGNAT, per-subscriber QoS and low-latency on BNGSOFT: the fleet, the cost, the experience, and the NOC.
Important: this is an independent, illustrative engineering model at India-Tier-1 scale. It is not a statement that Jio, Airtel or any named operator deploys BNGSOFT, and BNGSOFT is not affiliated with them. Public subscriber figures are used only to set realistic scale; all sizing, cost and counter values are modelled and indicative — validate per deployment.
At 20 million subscribers, three numbers decide everything: the cost per subscriber, the latency they feel, and how fast your NOC can answer "why is my internet slow?" BNGSOFT moves all three the right way.
~20M
subscribers modelled
home + 5G FWA
broadband
broadband
~$0.15
per subscriber
commodity x86
ground segment
ground segment
<1 ms
added latency
L4S/AQM under load,
per subscriber
per subscriber
Seconds
to triage a complaint
per-subscriber
diagnostics
diagnostics
1 · The scale, and the three problems it creates
IPv4 IS GONE
20M subs, a few thousand public IPv4.
- India is acutely IPv4-short; every subscriber must share via CGNAT.
- 20M sessions of NAT state — carrier-grade, deterministic, logged.
EXPERIENCE AT SCALE
"Slow internet" = churn.
- Bufferbloat under load makes a fast link feel laggy on every plan.
- Capacity is contended at peak across millions of homes/FWA cells.
COST & OPS
Cents per sub decide the P&L.
- A proprietary BNG/CGNAT chassis tier costs dollars/sub at this scale.
- A NOC for millions can't chase tickets node-by-node.
2 · How it deploys across the country
BNG, CGNAT and QoS run as BNGSOFT software clusters at metro / circle aggregation PoPs — where subscriber traffic from OLTs (FTTH) and 5G cores (FWA) converges before the national backbone. Each PoP is a few commodity servers; the fleet scales out by adding nodes and PoPs, all managed centrally from NOC2.
Distributed BNG at the metro/circle edge; one NOC2 control plane over the whole national fleet. Add nodes per PoP and PoPs per region as the subscriber base grows.
3 · The fleet — what machines, and how many
At ~20M subscribers on high-density 2U nodes (~64k subs/node — 2×100G ÷ ~3 Mbps busy-hour), the modelled fleet is ~320 commodity servers across ~50 PoPs — N+1 per cluster. No proprietary chassis; standard Intel/AMD servers with 100G NICs.
| Layer | Modelled build | Notes |
|---|---|---|
| Node (2U, high-density) | 2× 16–24c x86 · 128 GB · 2× 100G (Intel E810 / E830 or NVIDIA ConnectX) | ~64k subs/node; ~200 Gbps |
| Per metro PoP | ~7 active nodes + 1 standby for ~400k subs | scale nodes to the PoP's subscriber base |
| National fleet | ~320 high-density nodes across ~50 PoPs | or ~640× 1U-100G nodes — same software |
| Control | NOC2 over the whole fleet | metrics · capacity projection · diagnose · licensing |
It's commodity hardware you already buy. The data plane runs in XDP at a few % CPU, so the limits are NIC + PCIe + memory — not exotic silicon. See the Hardware Sizing & TCO brief and size your own with the node calculator.
4 · The economics at scale
Ground-segment BNG + CGNAT cost for ~20M subscribers (directional) INDICATIVE
BNGSOFT = commodity x86 (~$0.15/sub hardware) + software license. The chassis bar is a directional placeholder for a proprietary carrier BNG/CGNAT tier — replace with your own quotes.
Proprietary carrier chassis
$$$$
BNGSOFT on commodity x86
+ license
~$3M
modelled hardware for 20M subs (~$0.15/sub)
~320
commodity servers, no proprietary chassis
0
separate CGNAT tier — it's in the same box
Scale-out
linear cost as subscribers grow
5 · What 20 million subscribers actually feel
FAST UNDER LOAD
No bufferbloat.
- Per-subscriber L4S/AQM + Interactive Flow Protection keep games, calls and video smooth even when the line is busy.
- <1 ms added queuing latency at the BNG.
FAIR & RELIABLE
Everyone gets their plan.
- Per-subscriber shaping fair-shares contended capacity at peak.
- Zero-downtime upgrades — no maintenance outages for millions.
DUAL-STACK
IPv6 + CGNAT'd IPv4.
- Future-ready IPv6 with prefix delegation, plus shared IPv4 that just works.
- Deterministic CGNAT keeps apps and gaming behaving.
6 · How the support / NOC team works better
At 20M subscribers, the difference between a good and a great operator is mean-time-to-answer. BNGSOFT turns "is it the customer, the access, or the core?" from an hours-long escalation into a seconds-long lookup — per subscriber, from one console.
FROM THE NOC, IN SECONDS
Answer the ticket on first contact.
sub show <ip>→ that subscriber's live throughput, queuing latency, path RTT, QoE score and CGNAT state.- Instantly tells you whether the issue is the subscriber link, the access, or upstream — fewer escalations, fewer truck rolls.
- Live plan changes / suspends via RADIUS CoA — no reconnect, no field visit.
RUN THE FLEET FROM ONE PANE
Hundreds of nodes, one view.
- NOC2 metrics across every PoP; capacity projection per circle to plan growth before it bites.
- Startup self-test + crash telemetry on every node; zero-downtime restarts for maintenance.
- Per-pool CGNAT utilization and AQM health surfaced fleet-wide.
7 · What the NOC sees — real counters
The same bngxdpctl tooling that runs in production today, at PoP scale. Formats below are real; values are illustrative for a single ~24k-subscriber node in a Mumbai PoP.
noc2@mumbai-pop-03 # bngxdpctl metrics --pretty
version 3.3.x mode bond_native_cgnat bng_service_up 1 interfaces 24,118
cgnat.live subscribers 23,940 blocks_in_use 26,310 active_sessions 412,880
traffic ▲ upload 38.4 Gbps ▼ download 71.2 Gbps drops 0.002%
aqm mode l4s sojourn_avg 0.84 ms ce_marks 1.2M/s classic_drops 0
ifp priority_pkts 51M/s protected 100% (ACK · DNS · voice · gaming)
selftest 5 / 5 OK
noc2@mumbai-pop-03 # bngxdpctl sub show 100.74.21.190 # a "slow internet" ticket
subscriber ppp-amf-1182 Experience 100/100 (excellent)
Upload 9.2 Mbps Download 84 Mbps Queuing latency avg 0.7 ms max 1.9 ms Path RTT 11 ms
CGNAT Active Full-Cone public 49.x.x.x ports 1024–1151
→ verdict: subscriber link healthy — the problem is upstream / in-app, not our network.
noc2@mumbai-pop-03 # bngxdpctl capacity --project
CGNAT blocks 26,310 / 124,000 (21%) trend +1.4%/wk headroom ~14 months
version 3.3.x mode bond_native_cgnat bng_service_up 1 interfaces 24,118
cgnat.live subscribers 23,940 blocks_in_use 26,310 active_sessions 412,880
traffic ▲ upload 38.4 Gbps ▼ download 71.2 Gbps drops 0.002%
aqm mode l4s sojourn_avg 0.84 ms ce_marks 1.2M/s classic_drops 0
ifp priority_pkts 51M/s protected 100% (ACK · DNS · voice · gaming)
selftest 5 / 5 OK
noc2@mumbai-pop-03 # bngxdpctl sub show 100.74.21.190 # a "slow internet" ticket
subscriber ppp-amf-1182 Experience 100/100 (excellent)
Upload 9.2 Mbps Download 84 Mbps Queuing latency avg 0.7 ms max 1.9 ms Path RTT 11 ms
CGNAT Active Full-Cone public 49.x.x.x ports 1024–1151
→ verdict: subscriber link healthy — the problem is upstream / in-app, not our network.
noc2@mumbai-pop-03 # bngxdpctl capacity --project
CGNAT blocks 26,310 / 124,000 (21%) trend +1.4%/wk headroom ~14 months
Illustrative format — the
bngxdpctl metrics / sub show / capacity commands and fields are real BNGSOFT tooling; the values shown are modelled for one node at PoP scale, not captured from a named operator.The support win in one line: a Level-1 agent can confirm on the call that a subscriber's link is healthy (or pinpoint exactly where it isn't) — collapsing escalations, truck rolls and "we'll call you back."
8 · Rollout — circle by circle, no flag day
1 · PILOT A PoP
One metro cluster.
- Stand up a BNGSOFT cluster as a new NAS at one PoP, on your existing RADIUS. Prove CGNAT, QoS and latency on real subscribers.
2 · SCALE BY CIRCLE
Region by region.
- Migrate VLANs / OLTs / FWA cells into BNGSOFT PoP-by-PoP, at your pace, with easy rollback. No big-bang cutover.
3 · CONSOLIDATE
Retire the old tier.
- Decommission legacy BNG / CGNAT chassis as traffic moves; reclaim rack, power and licences.
9 · What it means at this scale
India Tier-1 reference model · operator value
Ground-segment cost in cents~$0.15/subscriber on commodity x86 — a fraction of a proprietary BNG/CGNAT chassis tier across 20M subs.
"Feels like fibre" for everyonePer-subscriber L4S/AQM + IFP keep latency under 1 ms added even at peak — on every plan, network-wide.
A NOC that answers in secondsPer-subscriber diagnostics + one-pane fleet metrics collapse MTTR, escalations and truck rolls.
Maintenance without outagesZero-downtime restarts — you don't take 20 million subscribers down to upgrade.
Scale-out, not forkliftAdd commodity nodes per PoP as FTTH and 5G FWA grow — predictable, linear cost, no lock-in.
Secure & compliant by designAnti-spoof, DDoS, deterministic CGNAT logging (IPFIX/syslog) for lawful intercept at national scale.
The bottom line
At India-Tier-1 scale, BNGSOFT turns the broadband edge into software on commodity servers: ~$0.15 per subscriber, <1 ms added latency on every plan, and a NOC that triages any subscriber in seconds — across ~20 million subs, ~50 PoPs, one control plane, zero-downtime upgrades.
Carrier scale. Commodity cost. A network your support team can actually see.
Sources & honest framing: This is an independent, illustrative reference model at India-Tier-1 scale; it is not a claim that Jio, Airtel or any named operator uses BNGSOFT, and BNGSOFT is not affiliated with, endorsed by, or partnered with them. Public scale figures (as of Jan/Feb 2026): Jio leads fixed-wired broadband at ~13.99M and ~70.9% of 5G FWA, total broadband base ~517M — JM Financial via The Tribune; Airtel total base ~364M — IBEF. The modelled deployment (~20M home/FWA subscribers, ~50 PoPs, ~320 high-density nodes, ~$0.15/subscriber hardware, <1 ms added queuing latency) is a BNGSOFT engineering estimate to illustrate scale; all node counts, costs and counters are indicative and depend on hardware, PoP design, traffic mix and configuration — validate per deployment. The cost-comparison bar is directional and excludes vendor-specific pricing on both sides; the software license, optics, power and operational costs are additional. ILLUSTRATIVE The NOC terminal block uses real
bngxdpctl command/field formats with modelled values; it is not a captured log from a named operator. BNGSOFT figures (CGNAT, L4S/AQM + IFP, anti-spoof/DDoS, NOC2 diagnostics, zero-downtime restart, ~$0.15/sub) are from BNGSOFT deployment/lab data and are indicative. Jio®, Airtel®, JioFiber®, Xstream® and other names are trademarks of their respective owners. Prepared as a management overview for large-scale operators.