How is the speed of a bridge set?
I have a bridge (created via systemd-networkd) which links a few physical interfaces. All of the interfaces are 1 Gbps, except one which is 100 Mbps.
The problem: it looks like (from local iperf3 tests) that the speed between the bridge and a 1 Gbps device (connected through a 1 Gbps physical NIC via a cable) is 100 Mbps.
ethtool shows that all of the 1000 interfaces advertise being capable of 1000 and actually negotiated 1000. The 100 interface negotiated 100.
Before going further in investigations: how is the speed of a bridge set up? Specifically: is is capped to the slowest (capabilities/negotiated speed-wise) NIC?
networking interface network-bridge download-speed
asked Feb 14 at 14:17
WoJWoJ
5083926
add a comment |
I have a bridge (created via systemd-networkd) which links a few physical interfaces. All of the interfaces are 1 Gbps, except one which is 100 Mbps.
The problem: it looks like (from local iperf3 tests) that the speed between the bridge and a 1 Gbps device (connected through a 1 Gbps physical NIC via a cable) is 100 Mbps.
ethtool shows that all of the 1000 interfaces advertise being capable of 1000 and actually negotiated 1000. The 100 interface negotiated 100.
Before going further in investigations: how is the speed of a bridge set up? Specifically: is is capped to the slowest (capabilities/negotiated speed-wise) NIC?
networking interface network-bridge download-speed
asked Feb 14 at 14:17
WoJWoJ
5083926
Yes it is capped to the slowest device. That is why almost all uses switches these day, they are capable of communicating with different devises at different speeds - Bridges default to the slowest device, thereby bringing the whole net down - If you have a network printer, try hooking it up - and behold NEW speed of only 10 Mbps ( printers are slow devices !)
– Ken Mollerup
Feb 14 at 15:28
Try creating a second bridge to the 100Mbps interface, and remove the 100Mbps interface from the first bridge. See if that improves speed to the 1G interfaces.
– heynnema
Feb 14 at 15:54
add a comment |
I have a bridge (created via systemd-networkd) which links a few physical interfaces. All of the interfaces are 1 Gbps, except one which is 100 Mbps.
The problem: it looks like (from local iperf3 tests) that the speed between the bridge and a 1 Gbps device (connected through a 1 Gbps physical NIC via a cable) is 100 Mbps.
ethtool shows that all of the 1000 interfaces advertise being capable of 1000 and actually negotiated 1000. The 100 interface negotiated 100.
Before going further in investigations: how is the speed of a bridge set up? Specifically: is is capped to the slowest (capabilities/negotiated speed-wise) NIC?
networking interface network-bridge download-speed
asked Feb 14 at 14:17
WoJWoJ
5083926
I have a bridge (created via systemd-networkd) which links a few physical interfaces. All of the interfaces are 1 Gbps, except one which is 100 Mbps.
The problem: it looks like (from local iperf3 tests) that the speed between the bridge and a 1 Gbps device (connected through a 1 Gbps physical NIC via a cable) is 100 Mbps.
ethtool shows that all of the 1000 interfaces advertise being capable of 1000 and actually negotiated 1000. The 100 interface negotiated 100.
Before going further in investigations: how is the speed of a bridge set up? Specifically: is is capped to the slowest (capabilities/negotiated speed-wise) NIC?
networking interface network-bridge download-speed
networking interface network-bridge download-speed
asked Feb 14 at 14:17
WoJWoJ
5083926
asked Feb 14 at 14:17
WoJWoJ
5083926
edited Feb 14 at 14:32
WoJ
asked Feb 14 at 14:17
WoJWoJ
5083926
asked Feb 14 at 14:17
WoJWoJ
5083926
asked Feb 14 at 14:17
WoJWoJ
5083926
5083926
Yes it is capped to the slowest device. That is why almost all uses switches these day, they are capable of communicating with different devises at different speeds - Bridges default to the slowest device, thereby bringing the whole net down - If you have a network printer, try hooking it up - and behold NEW speed of only 10 Mbps ( printers are slow devices !)
– Ken Mollerup
Feb 14 at 15:28
Try creating a second bridge to the 100Mbps interface, and remove the 100Mbps interface from the first bridge. See if that improves speed to the 1G interfaces.
– heynnema
Feb 14 at 15:54
add a comment |
Yes it is capped to the slowest device. That is why almost all uses switches these day, they are capable of communicating with different devises at different speeds - Bridges default to the slowest device, thereby bringing the whole net down - If you have a network printer, try hooking it up - and behold NEW speed of only 10 Mbps ( printers are slow devices !)
– Ken Mollerup
Feb 14 at 15:28
Try creating a second bridge to the 100Mbps interface, and remove the 100Mbps interface from the first bridge. See if that improves speed to the 1G interfaces.
– heynnema
Feb 14 at 15:54
Yes it is capped to the slowest device. That is why almost all uses switches these day, they are capable of communicating with different devises at different speeds - Bridges default to the slowest device, thereby bringing the whole net down - If you have a network printer, try hooking it up - and behold NEW speed of only 10 Mbps ( printers are slow devices !)
– Ken Mollerup
Feb 14 at 15:28
Yes it is capped to the slowest device. That is why almost all uses switches these day, they are capable of communicating with different devises at different speeds - Bridges default to the slowest device, thereby bringing the whole net down - If you have a network printer, try hooking it up - and behold NEW speed of only 10 Mbps ( printers are slow devices !)
– Ken Mollerup
Feb 14 at 15:28
Try creating a second bridge to the 100Mbps interface, and remove the 100Mbps interface from the first bridge. See if that improves speed to the 1G interfaces.
– heynnema
Feb 14 at 15:54
Try creating a second bridge to the 100Mbps interface, and remove the 100Mbps interface from the first bridge. See if that improves speed to the 1G interfaces.
– heynnema
Feb 14 at 15:54
add a comment |
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Yes it is capped to the slowest device. That is why almost all uses switches these day, they are capable of communicating with different devises at different speeds - Bridges default to the slowest device, thereby bringing the whole net down - If you have a network printer, try hooking it up - and behold NEW speed of only 10 Mbps ( printers are slow devices !)
– Ken Mollerup
Feb 14 at 15:28
Try creating a second bridge to the 100Mbps interface, and remove the 100Mbps interface from the first bridge. See if that improves speed to the 1G interfaces.
– heynnema
Feb 14 at 15:54