Nokia 7730 SXR
The Nokia 7730 SXR is built on the FP5 network processor, the same silicon generation as the 7750 SR FP5 line cards. It delivers core-class buffering and QoS scale in a platform targeted at core and data center interconnect (DCI) roles.
| Field | Value |
|---|---|
| Total Buffer | Multi-GB (FP5-class, comparable to 7750 SR FP5) |
| Buffer Model | Fully shared |
| Silicon | Nokia FP5 |
| Queues | ~256k (FP5-scale) |
| Target Interfaces | High-density (400G+) |
| Target Role | Core, peering, DCI |
Buffer Characteristics
- Fully shared buffer architecture — no static per-port allocation
- Deep packet memory in the multi-GB range, consistent with FP5 line cards in the 7750 SR
- Integrated pre-buffer, main buffer, and QoS scheduler in a tightly coupled pipeline
- Deterministic buffering and line-rate memory access
What It Handles Well
- High oversubscription ratios
- Large-scale traffic aggregation for core and peering
- Deterministic QoS enforcement under sustained congestion
- Microbursts at 400G+ line rates
Relationship to the 7750 SR FP5
The 7730 SXR uses the same FP5 silicon as 7750 SR FP5 line cards, so buffering behavior is comparable:
- Same fully shared memory model
- Same pre-buffer + forwarding pipeline integration
- Same queue scale (~256k queues, FP5-class)
See the Nokia SR Platform architecture page for FP4/FP5 detail, and the Nokia Access/Aggregation page for the broader platform comparison.