OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
    0%
  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity Medium
  • Priority Very Low
  • Reported Version openwrt-18.06
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Madarassy Laszlo - 27.08.2019

FS#2467 - Remote desktop unusale with flow offloading

Hi,

I have latest stable openwrt installed to my Xiaomi R3G router.
I have a port forward to a windows RDP.
When Flow offloading (Software flow offloading or both Hardware and Software flow offloading) enabled the RDP connection became slow and laggy, reconnects often.

If I disable flow offload, everything works fine.

I’ll try to look tcpdump/wireshark captures.

Thanks,
Laszlo


Madarassy Laszlo commented on 27.08.2019 13:47

Did some capture on the windows machine. With flow offload I had a lot of DUPs and retransmissions:

401   2.284161 192.168.0.252 → 89.135.192.225 TLSv1.2 262 Application Data
402   2.284446 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
403   2.284570 192.168.0.252 → 89.135.192.225 TLSv1.2 1706 Application Data
404   2.284669 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
405   2.284897 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
406   2.285057 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
407   2.285166 192.168.0.252 → 89.135.192.225 TLSv1.2 1706 Application Data
408   2.285386 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
409   2.285491 192.168.0.252 → 89.135.192.225 TLSv1.2 1706 Application Data
410   2.285612 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
411   2.285739 192.168.0.252 → 89.135.192.225 TLSv1.2 688 Application Data
412   2.285949 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
413   2.288843 89.135.192.225 → 192.168.0.252 TCP 60 16215 → 3389 [ACK] Seq=3858 Ack=59309 Win=260 Len=0
414   2.290967 89.135.192.225 → 192.168.0.252 TCP 60 16215 → 3389 [ACK] Seq=3858 Ack=59423 Win=260 Len=0
415   2.291227 89.135.192.225 → 192.168.0.252 TCP 66 [TCP Dup ACK 414#1] 16215 → 3389 [ACK] Seq=3858 Ack=59423 Win=260 Len=0 SLE=61075 SRE=61283
416   2.291237 89.135.192.225 → 192.168.0.252 TCP 66 [TCP Dup ACK 414#2] 16215 → 3389 [ACK] Seq=3858 Ack=59423 Win=260 Len=0 SLE=61075 SRE=61336
417   2.291252 89.135.192.225 → 192.168.0.252 TLSv1.2 107 Application Data
418   2.291656 89.135.192.225 → 192.168.0.252 TCP 74 [TCP Dup ACK 414#3] 16215 → 3389 [ACK] Seq=3911 Ack=59423 Win=260 Len=0 SLE=62988 SRE=63147 SLE=61075 SRE=61336
419   2.291721 192.168.0.252 → 89.135.192.225 TCP 1506 [TCP Fast Retransmission]  [TCP segment of a reassembled PDU]
420   2.291797 192.168.0.252 → 89.135.192.225 TCP 254 [TCP Retransmission] 3389 → 16215 [PSH, ACK] Seq=60875 Ack=3911 Win=63833 Len=200
421   2.292125 89.135.192.225 → 192.168.0.252 TCP 82 [TCP Dup ACK 414#4] 16215 → 3389 [ACK] Seq=3911 Ack=59423 Win=260 Len=0 SLE=64799 SRE=64852 SLE=62988 SRE=63147 SLE=61075 SRE=61336
422   2.293605 89.135.192.225 → 192.168.0.252 TCP 90 [TCP Dup ACK 414#5] 16215 → 3389 [ACK] Seq=3911 Ack=59423 Win=260 Len=0 SLE=66504 SRE=66557 SLE=64799 SRE=64852 SLE=62988 SRE=63147 SLE=61075 SRE=61336
423   2.293614 89.135.192.225 → 192.168.0.252 TCP 90 [TCP Dup ACK 414#6] 16215 → 3389 [ACK] Seq=3911 Ack=59423 Win=260 Len=0 SLE=66504 SRE=67191 SLE=64799 SRE=64852 SLE=62988 SRE=63147 SLE=61075 SRE=61336
424   2.293622 89.135.192.225 → 192.168.0.252 TCP 90 [TCP Dup ACK 414#7] 16215 → 3389 [ACK] Seq=3911 Ack=59423 Win=260 Len=0 SLE=66504 SRE=67244 SLE=64799 SRE=64852 SLE=62988 SRE=63147 SLE=61075 SRE=61336
425   2.293694 192.168.0.252 → 89.135.192.225 TCP 1506 [TCP Retransmission] 3389 → 16215 [ACK] Seq=61336 Ack=3911 Win=63833 Len=1452
426   2.293711 192.168.0.252 → 89.135.192.225 TCP 254 [TCP Retransmission] 3389 → 16215 [PSH, ACK] Seq=62788 Ack=3911 Win=63833 Len=200
427   2.293804 192.168.0.252 → 89.135.192.225 TCP 1506 [TCP Retransmission] 3389 → 16215 [ACK] Seq=63147 Ack=3911 Win=63833 Len=1452
428   2.293819 192.168.0.252 → 89.135.192.225 TCP 254 [TCP Retransmission] 3389 → 16215 [PSH, ACK] Seq=64599 Ack=3911 Win=63833 Len=200
429   2.293900 192.168.0.252 → 89.135.192.225 TCP 1506 [TCP Retransmission] 3389 → 16215 [ACK] Seq=64852 Ack=3911 Win=63833 Len=1452
430   2.293935 192.168.0.252 → 89.135.192.225 TCP 254 [TCP Retransmission] 3389 → 16215 [PSH, ACK] Seq=66304 Ack=3911 Win=63833 Len=200
431   2.296622 89.135.192.225 → 192.168.0.252 TCP 90 16215 → 3389 [ACK] Seq=3911 Ack=60875 Win=260 Len=0 SLE=66504 SRE=67244 SLE=64799 SRE=64852 SLE=62988 SRE=63147 SLE=61075 SRE=61336
432   2.296631 89.135.192.225 → 192.168.0.252 TCP 82 16215 → 3389 [ACK] Seq=3911 Ack=61336 Win=259 Len=0 SLE=66504 SRE=67244 SLE=64799 SRE=64852 SLE=62988 SRE=63147
433   2.296736 89.135.192.225 → 192.168.0.252 TLSv1.2 107 Application Data
434   2.312884 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
435   2.313056 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
436   2.313286 192.168.0.252 → 89.135.192.225 TCP 1506 [TCP segment of a reassembled PDU]
437   2.313309 192.168.0.252 → 89.135.192.225 TLSv1.2 254 Application Data
438   2.313453 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data
439   2.313567 192.168.0.252 → 89.135.192.225 TCP 1506 [TCP segment of a reassembled PDU]
440   2.313622 192.168.0.252 → 89.135.192.225 TLSv1.2 254 Application Data
441   2.313806 192.168.0.252 → 89.135.192.225 TLSv1.2 107 Application Data

I can provide the whole pcap if needed.

adrian commented on 11.10.2019 07:02

Yes I can confirm. The RDP sessions trough a port forward behind 18.06.4 with Flow offload are very laggy. Unusable. The quality signal displayed by the windows client is always (1 ligne) very poor.

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