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Ixiasoft
Visible to Intel only — GUID: eto1602184335746
Ixiasoft
2.1.3. PMA Data Rates
The PMA data rate is dictated by the datapath clocking mode and PMA type you select.
For speed grade information, see the Intel® Agilex® Device Data Sheet .
Datapath Clocking Mode | Configuration | Data Rate Range | |
---|---|---|---|
FHT PMA | FGT PMA | ||
PMA clocking mode (maximum 906.25 MHz) |
PMA Direct |
|
|
System PLL clocking mode (maximum 1 GHz) |
PMA Direct Other configurations with MAC, PCS, and FEC |
Fracture Type | Ethernet Mode | PMA Direct Mode3 0 | FEC Direct Mode | |||
---|---|---|---|---|---|---|
FGT | FHT | FGT | FHT | FGT | FHT | |
st_x1 | 10GbE-1, 25GbE-1 | 25GbE-1 | One lane with PMA width ≤ 32 | One lane with PMA width ≤ 32 | One lane with PMA width ≤ 32 | One lane with PMA width ≤ 32 |
st_x2 | 50GbE-1, 50GbE-2 | 50GbE-1, 50GbE-2 | One lane with PMA width = 64 | One lane with PMA width = 64 | Two bonded lanes with PMA width ≤ 32 One lane with PMA width = 64 |
Two bonded lanes with PMA width ≤ 32 One lane with PMA width = 64 |
st_x4 | 40GbE-4, 100GbE-2, 100GbE-4 | 100GbE-1, 100GbE-2, 100GbE-4 | Not used | One lane with PMA width = 128 | Four bonded lanes with PMA width ≤ 32 Two bonded lanes with PMA width = 64 |
Four bonded lanes with PMA width ≤ 32 Two bonded lanes with PMA width = 64 One lane with PMA width = 128 |
st_x8 | 200GbE-4, 200GbE-8 | 200GbE-2, 200GbE-4 | Not used | Not used | Eight bonded lanes with PMA width ≤ 32 Four bonded lanes with PMA width = 64 |
Four bonded lanes with PMA width = 64 Two bonded lanes with PMA width = 128 |
st_x16 | 400GbE-8 | 400GbE-4 | Not used | Not used | Eight bonded lanes with PMA width = 64 | Four bonded lanes with PMA width = 128 |
PMA Direct modes, unlike Ethernet and FEC Direct modes, do not use the underlying logic of the fracture (MAC, PCS, or FEC). The following examples illustrate the differences between Ethernet and FEC Direct modes and PMA Direct modes.
- PMA width = 32 example:
- 100GbE-4 Ethernet link using four PMAs – four bonded lanes of 25.78125 Gbps
- One st_x4 fracture is used.
- 100 Gbps PMA Direct link using four PMAs – four bonded lanes of 25.78125 Gbps
- Four st_x1 fractures are used.
- 100 Gbps FEC Direct link using four PMAs – four bonded lanes of 25.78125 Gbps
- One st_x4 fracture is used.
- 100GbE-4 Ethernet link using four PMAs – four bonded lanes of 25.78125 Gbps
- PMA width = 64 example
- 400GbE-8 Ethernet link using four PMAs – eight bonded lanes of 53.125 Gbps
- One st_x16 fracture is used.
- 400 Gbps PMA Direct link using eight PMAs – eight bonded lanes of 53.125 Gbps
- Eight st_x2 fractures are used.
- 400 Gbps FEC Direct link using eight PMAs – eight bonded lanes of 53.125 Gbps
- One st_x16 fracture is used.
- 400GbE-8 Ethernet link using four PMAs – eight bonded lanes of 53.125 Gbps
- Two, four, eight, and 16 bonded FGT lanes with a PMA width ≤ 32 use two, four, eight, and 16 st_x1 fractures, respectively.
- Two, four, and eight bonded FGT lanes with a PMA width = 64 use two, four, and eight st_x2 fractures, respectively.
- Two and four bonded FHT lanes with a PMA width ≤ 32 use two and four st_x1 fractures, respectively.
- Two and four bonded FHT lanes with a PMA width = 64 use two and four st_x2 fractures, respectively.
- Two and four bonded FHT lanes with a PMA width = 128 use two and four st_x4 fractures, respectively.