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Forum Discussion
SXS80 2.5G LAN Ethernet Port 1 - Link speed limited to 1000 Mbps?
Hi, I am using a NAS (Synology DS1823xs+) that is connected via a CAT8 ethernet cable, from the NAS’ LAN 3 port (10GbE) to the LAN 1 port (2.5GbE) on a Netgear Orbi Pro 6 Satellite (SXS80) with the l...
A possible starting point would be to use the formal driver supported ethtool to check the adapter settings as well as the base ideas for some experimenting (for the NAS side of course):
Viewing adapter settings
---------------------
ethtool <ethX>
Output example:
Settings for enp1s0:
Supported ports: [ TP ]
Supported link modes: 100baseT/Full
1000baseT/Full
10000baseT/Full
2500baseT/Full
5000baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 100baseT/Full
1000baseT/Full
10000baseT/Full
2500baseT/Full
5000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 10000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: g
Wake-on: d
Link detected: yes
---
Note: AQC FW provides only information on actual negotiated pause frame usage.
Link partner pause settings are not directly available.
Thus, `Advertised pause frame use` actually shows negotiated settings.
To see the real advertised settings, use `ethtool -a eth0`.
Viewing adapter information
---------------------
ethtool -i <ethX>
Output example:
driver: atlantic
version: 2.3.1
firmware-version: 3.1.78
expansion-rom-version:
bus-info: 0000:01:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no
---------------------
Keen for some more experimenting? Try to disable autonegotiation and fix the link speed eg. to 2500:
ethtool -s eth0 autoneg off speed 2500
Before I potentially mess something up, is there any possible downside (that isn't reversible) to manually changing the link speed to 2500 using "ethtool -s eth0 autoneg off speed 2500"? Thanks 🙂
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