VirtualBox

Changes between Initial Version and Version 1 of Ticket #15996


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Timestamp:
Sep 28, 2016 3:37:32 PM (8 years ago)
Author:
Valery Ushakov
Comment:

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  • Ticket #15996 – Description

    initial v1  
    11Hello,
    22
    3 i have a special configuration and the shinny new macos 10.12. So It could be that macos is the cause of
    4 this error too.
     3i have a special configuration and the shinny new macos 10.12. So It could be that macos is the cause of this error too.
    54
    65I'm running 5.1.6 on 10.12 macos and installed a own bridge on macos with:
     6{{{
    77ifconfig bridge0 create
    88ifconfig bridge0 10.24.1.1/24 up
    99ifconfig bridge0 inet6 fd00::10:24:1:1/64 up
     10}}}
    1011than I bind my guest to these bridge0 and on ipv4 all is good but on ipv6 ping's are working
    1112but any tcp or udp doesn't.
    1213The root cause is that the guest host receives packet with a wrong checksum:
    13 
     14{{{
    14151       0.000000        fd00::10:24:1:1 fd00::10:24:1:201       TCP     98      53596→22 [SYN, ECN, CWR] Seq=0 Win=65535 [TCP CHECKSUM INCORRECT] Len=0 MSS=1440 WS=32 TSval=497945749 TSecr=0 SACK_PERM=1
    15 
    16 If add another guest to that bridge and try so access my dest from these new ("linux") guest everything is
    17 ok. Like:
    18 
     16}}}
     17If add another guest to that bridge and try so access my dest from these new ("linux") guest everything is ok. Like:
     18{{{
    19191       0.000000        fd00::10:24:1:149       fd00::10:24:1:201       TCP     94      45678→22 [SYN] Seq=0 Win=28800 Len=0 MSS=1440 SACK_PERM=1 TSval=301306 TSecr=0 WS=128
    20 
     20}}}
    2121I was not able to check the chksum generation if i plugin a real device to the macos bridge.
    2222
    23 And i did not have these ipv6 use case days before where i had run 10.11, so this problem might be new or
    24 old from virtualbox or macos ...
     23And i did not have these ipv6 use case days before where i had run 10.11, so this problem might be new or old from virtualbox or macos ...
    2524I decided to report to you out of the fact that you are not manage the bridges on macos like on linux where you add a virtual device to the bridge. This is a kind of odd-:)
    2625
    2726Cheers
     27meno
    2828
    29 meno
    30 P.S. ifconfig bridge0
     29P.S.
     30{{{
     31$ ifconfig bridge0
    3132bridge0: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    3233        options=63<RXCSUM,TXCSUM,TSO4,TSO6>
     
    4445        media: <unknown type>
    4546        status: inactive
     47}}}

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