Not sure at what point this started happening, but users reported slow down with remote desktop sessions when a large burst of traffic from other vlans is being forwarded on other networks. The problem interface is Eth0 where we have vlans feeding into a single Gigabit NIC. When running interface utilization reports, we never see the interface usage above 50%. CPU during this time also is not overly high either.
This is running on an SG210 unit with 9.707-5
The switch side looks good with no errors on the port as well as showing it negotiated at 1Gb/s. It is possible that this single interface is being overrun with a high amount of small sized frames that are crushing the buffers on the NIC? We have disabled IPS as well with no improvement either.
Thoughts?
Kernel Interface table
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
eth0 1500 0 1293356652 0 0 6189083 871370358 0 0 0 BMRU
eth0.250 1 500 0 124224906 0 0 894 110990123 0 0 0 BMRU
eth0.252 1500 0 766372373 0 0 210 680361194 0 0 0 BMRU
eth0.254 1500 0 62973369 0 0 893 55570793 0 0 0 BMRU
eth1 1500 0 3339392878 0 0 26208 4054117486 0 0 0 BMRU
eth2 1500 0 7495678554 0 0 1593 7215925998 0 0 0 BMRU
eth2.270 1500 0 843462196 0 0 0 935233965 0 0 0 BMRU
eth2.271 1500 0 2426691545 0 0 2246 1777174610 0 0 0 BMRU
eth2.272 1500 0 2065913509 0 0 0 2605155602 0 0 0 BMRU
eth3 2000 0 112792697 0 0 63 2624902163 0 0 0 BMRU
eth4 1500 0 456 0 0 0 36 0 0 0 BMRU
lo 65536 0 530130435 0 0 59 530130435 0 0 0 LRU
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