GbLAN
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Gigabit LAN
The PS3 has 1 Gigabit Ethernet port. The port accepts Auto-MDIX (automatic medium-dependent interface crossover), so no need for special crosscables when hooking up the PS3 direct to the PC.
Gigabit LAN chips used
A sample of the GbLAN chips in different PS3 models:
| Ports | Size | Speed | Voltage | Packaging | Manufacturer | Serial Number | Description |
|---|---|---|---|---|---|---|---|
| 8 (3 used) | 20x20mm | Xtal X3501: 25MHz | 3.3V/1.9V/1.2V | 144-pin TQFP | Marvell Alaska | 88E6108-LAR1 | Used in earlier models (up to CECHGxx/SEM-00x) |
| ? | ? | ? | ? | ? | Marvell Alaska | 88E6106-LKJ1 | Used in later models (CECHHxx/DIA-00x) |
| - | - | 125MHz | 3.3V, 2.5V or 1.8V | 64-pin QFN | Marvell Alaska | 88E1118R-NNC2 | Used in Slim models (CECH-20xx/DYN-00x) |
| - | - | - | - | - | Marvell Alaska | 88E1310-NNB2 | Used in Slim models (CECH-25xx, CECH-30xx) |
Jumbo frames
From Linux perspective (under OtherOS <=3.15), the old drivers set the MTU to 2308, while newer versions set the MTU of 1518. This could be a hypervisor restriction (needs research).
MTU is set with vsh using syscall net_ioctl (libnet)
On 3.41 firmware, with a modified ps3_gelic driver, frames of 1624 bytes can be sent and frames of 1628 bytes can be received.
Efficiency
| Frame type | Layer 1 overhead | Layer 2 overhead | MTU | Layer 3 overhead | Layer 4 overhead | Payload size | Total transmitted | Efficiency | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Standard | preamble 8 byte |
IPG 12 byte |
frame header 14 byte |
FCS 4 byte |
1500 | IPv4 header 20 byte |
TCP header 20 byte |
1460 byte | 1538 byte | 94.93% |
| old gelic | 2308 | 2268 byte | 2346 byte | 96.68% | ||||||
| new gelic | 1518 | 1478 byte | 1556 byte | 94.99% | ||||||
| mod gelic | 1624 | 1584 byte | 1662 byte | 95.31% | ||||||
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