You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
All of the above devices use AR8327 rev as their switch:
[ 0.881815] switch0: Atheros AR8327 rev. 4 switch registered on ag71xx-mdio.0
Steps to reproduce:
A) iperf clients
3x TL-WR1043NDv2 connected by their WAN port, that is configured to act as vlan trunk port only.
1x TL-WDR3600 connected by it's WAN port, that is configured to act as vlan trunk port only.
1x TL-WR1043NDv2 connected by it's port no 4, that is configured to act as vlan trunk port only.
B) iperf server 1 (192.168.0.1)
C) iperf server 2 (192.168.0.11)
D) four gigabit ethernet easysmart/websmart switches with 1,5GB+ throughput, each, in between A,B,C.
Any A against B over cable - as an example:
Client connecting to 192.168.0.1, TCP port 5001
TCP window size: 43.8 KByte (default)
[ 3] local 192.168.0.75 port 35102 connected with 192.168.0.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 179 MBytes 150 Mbits/sec
C against B over each of the 4 devices in D:
Client connecting to 192.168.0.1, TCP port 5001
TCP window size: 85.0 KByte (default)
[ 3] local 192.168.0.11 port 56228 connected with 192.168.0.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 1.09 GBytes 938 Mbits/sec
Each of the TP-Links is using switch-only, no WAN, no NAT, but INPUT-iptables for their respective vlans, so another test of one of the A-devices against B w/o iptables:
Client connecting to 192.168.0.1, TCP port 5001
TCP window size: 43.8 KByte (default)
[ 3] local 192.168.0.242 port 45976 connected with 192.168.0.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 213 MBytes 179 Mbits/sec
It seems, that devices containing AR8327 rev4 wont achieve more than 1/5 of the specified nominal LAN speeds, when acting as an endpoint.
Further observations: WLAN clients won't exceed 25-30 Mbit/s, when using one of the trunked vlans. (WLAN client iwlwifi, Centrino N 2230, e.g. in either 40 or 20 MHz against A-devices in 802.11n WDS AP mode).
Since this is no WAN to LAN scenario, (missing) HWNAT cannot be involved.
Why is the switch performance below expectations? Is this a hw issue or a driver problem?
The text was updated successfully, but these errors were encountered:
eripek:
Affected devices and versions of LEDE/OpenWRT:
1x TL-WR1043NDv2 - OpenWrt SNAPSHOT, r6800-52ba576
3x TL-WR1043NDv2 - LEDE 17.01.4 (stable)
1x TL-WDR3600 - LEDE 17.01.4 (stable)
All of the above devices use AR8327 rev as their switch:
[ 0.881815] switch0: Atheros AR8327 rev. 4 switch registered on ag71xx-mdio.0
Steps to reproduce:
A) iperf clients
3x TL-WR1043NDv2 connected by their WAN port, that is configured to act as vlan trunk port only.
1x TL-WDR3600 connected by it's WAN port, that is configured to act as vlan trunk port only.
1x TL-WR1043NDv2 connected by it's port no 4, that is configured to act as vlan trunk port only.
B) iperf server 1 (192.168.0.1)
C) iperf server 2 (192.168.0.11)
D) four gigabit ethernet easysmart/websmart switches with 1,5GB+ throughput, each, in between A,B,C.
Client connecting to 192.168.0.1, TCP port 5001
TCP window size: 43.8 KByte (default)
[ 3] local 192.168.0.75 port 35102 connected with 192.168.0.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 179 MBytes 150 Mbits/sec
Client connecting to 192.168.0.1, TCP port 5001
TCP window size: 85.0 KByte (default)
[ 3] local 192.168.0.11 port 56228 connected with 192.168.0.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 1.09 GBytes 938 Mbits/sec
Each of the TP-Links is using switch-only, no WAN, no NAT, but INPUT-iptables for their respective vlans, so another test of one of the A-devices against B w/o iptables:
Client connecting to 192.168.0.1, TCP port 5001
TCP window size: 43.8 KByte (default)
[ 3] local 192.168.0.242 port 45976 connected with 192.168.0.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 213 MBytes 179 Mbits/sec
It seems, that devices containing AR8327 rev4 wont achieve more than 1/5 of the specified nominal LAN speeds, when acting as an endpoint.
Further observations: WLAN clients won't exceed 25-30 Mbit/s, when using one of the trunked vlans. (WLAN client iwlwifi, Centrino N 2230, e.g. in either 40 or 20 MHz against A-devices in 802.11n WDS AP mode).
Since this is no WAN to LAN scenario, (missing) HWNAT cannot be involved.
Why is the switch performance below expectations? Is this a hw issue or a driver problem?
The text was updated successfully, but these errors were encountered: