Severe CPU bottleneck when forwarding traffic
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Hi,
we are experiencing severe performance bottleneck when forwarding traffic. The CPU utilization jumps from nothing to 100% every time the traffic is forwaded. We are using virtual servers and we have about 21 active entries in the virtual servers list, but this is happening regardless of the amount of entries. We have tried disabling firewall, load balancing, bandwidth control, tried different forwarding techniques, but nothing helped.
With the maxed out CPU the bandwidth speed becomes extremely limited. The router is using 10Gb SFP+ ports. The underlying local network is split using high performance switch with 2.5Gb/s ports for local devices and itself is connected to the router via the 10Gb SFP+. Direct transfer Device - Switch - Device (2.5Gb/s ports) gave us ~2.4 Gb/s, but when port forwarding we are getting ~400Mb/s on average. Previously we were using ER7206 that gave us max 200Mb/s when forwarding. We thought that this was due to the slow CPU, but after upgrading to ER8411 and seeing the exact same problem, we think it might be something with the firmware.
According to TP-Link, this appears to be completely normal, I don't fully trust this, it's not normal with such a high cpu.
there are also major problems with IPsec together with OpenVPN and SSL VPN on this router, they cannot be used at the same time without the router slowing everything down.
here is a bug report I posted earlier
ER8411 High CPU 24/7 Bug Report
the last two weeks, the router is at between 27-30% CPU all the time. I dont think this is normal.
