Pirho
Level 1 (16 points)
iPhone

Q: network routing

I have a mac Mini with a USB ethernet adapter, plus the built in WiFi, and Built in ethernet.  The USB adapter is on a completely different network then the WifI and Built in are (USB is on 10.95.5.x/24, wifi is 192.168.1.x/24).  On the 10 network I need to reach devices that are also on multiple networks in the 10.x range.  I add the route statement to the mac via terminal (sudo route -n add -net 10.0.0.0/8 10.95.5.1) and I can reach any 10 network that the default router knows about.  Problem is the traffic does not get segmented the way it should.  I constantly wind up dropping packets reaching anything on the 10 network, even if I set the service order so the USB adapter is the first connection in the list. Only when I disable the other interfaces does the 10 network cleanly respond.  Is there a way to force all traffic for that USB adapter out that interface that it is actually set for?  It looks like the Mac is attempting to load balance the connections instead of rout them out the proper ethernet. 

Mac Pro (Mid 2012), OS X Yosemite (10.10.3)

Posted on Aug 22, 2016 8:47 AM

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Pirho

Q: network routing

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  • Helpful answers

  • by a brody,

    a brody a brody Aug 22, 2016 5:25 PM in response to Pirho
    Level 9 (66,781 points)
    Classic Mac OS
    Aug 22, 2016 5:25 PM in response to Pirho

    What you may want to do is use port forwarding to open certain ports between routers.  But be careful to only open them at the LAN level and not the internet.  You may also want to set discrete ranges of 10 IP addresses for esch device that uses 10.  I would have to see your exact setup in person to further advise you. 

  • by Pirho,

    Pirho Pirho Aug 22, 2016 5:28 PM in response to a brody
    Level 1 (16 points)
    iPhone
    Aug 22, 2016 5:28 PM in response to a brody

    Not an option.  Two physically different networks,  no router between them, no router can exist between them either.

  • by KiltedTim,

    KiltedTim KiltedTim Aug 22, 2016 6:19 PM in response to Pirho
    Level 9 (54,814 points)
    iPhone
    Aug 22, 2016 6:19 PM in response to Pirho

    If you have the IP address, subnet, and default gateway set up for properly for both interfaces, you shouldn't need to specify routes. You're using static addresses for both networks, right? If you're not, switch them to static addresses. Having one or both set for DHCP may be causing issues.

  • by Pirho,

    Pirho Pirho Aug 22, 2016 6:31 PM in response to KiltedTim
    Level 1 (16 points)
    iPhone
    Aug 22, 2016 6:31 PM in response to KiltedTim

    Static address are set up, but as I said, the 10.95.5.x can not route to all the remaining 10.x network unless I tell the system to force it out a specific interface 10 that default gateway.  That same issue will happen with windows since the 10 network is broken into multiple subnets that are not local to that interfaces IP Address.  10.95.5.2/24 is a different network than 10.95.4.2/24.  Only by telling the interface to accept all 10 traffic will it route out properly, and as a note, if I disable all other interfaces, it will not drop any packets.   The minute I enable the 192.168.1.x/24 interface the packets will intermittently start dropping.

     

    Routing tables

     

    Internet:

    Destination        Gateway            Flags        Refs      Use   Netif Expire

    default            192.168.1.1        UGSc          697        7     en0

    default            10.95.5.1          UGScI           1        0     en5

    default            192.168.1.1        UGScI          25        0     en1

    10                 10.95.5.1          UGSc            2        0     en5

    10.95/16           10.95.5.1          UGSc            1       16     en5

    10.95.5/24         link#5             UCS             2        0     en5

    10.95.5.1/32       link#5             UCS             2        0     en5

    10.95.5.1          0:1f:45:9e:e:74    UHLWIir         5        3     en5   1144

    10.95.5.33/32      link#5             UCS             1        0     en5

    127                127.0.0.1          UCS             1        0     lo0

    127.0.0.1          127.0.0.1          UH             12  1534093     lo0

    169.254            link#4             UCS            18        0     en0

    169.254            link#5             UCSI            1        0     en5

    169.254            link#6             UCSI            1        0     en1

    169.254.1.112      link#4             UHLSW           1        0     en0

    169.254.42.91      link#4             UHLSW           1        0     en0

    169.254.61.24      link#4             UHLSW           1        0     en0

    169.254.61.47      link#4             UHLSW           1        0     en0

    169.254.66.49      link#4             UHLSW           1        0     en0

    169.254.68.9       link#4             UHLSW           1        0     en0

    169.254.69.135     link#4             UHLSW           1        0     en0

    169.254.72.117     link#4             UHLSW           1        0     en0

    169.254.100.214    link#4             UHLSW           1        0     en0

    169.254.130.181    link#4             UHLSW           1        0     en0

    169.254.134.171    link#4             UHLSW           1        0     en0

    169.254.162.93     link#4             UHLSW           1        0     en0

    169.254.165.54     link#4             UHLSW           1        0     en0

    169.254.167.66     link#4             UHLSW           1        0     en0

    169.254.172.7      link#4             UHLSW           1        0     en0

    169.254.200.147    link#4             UHLSW           1        0     en0

    169.254.218.203    link#4             UHLSW           1        0     en0

    192.168.1          link#4             UCS            48        0     en0

    192.168.1          link#6             UCSI           46        0     en1

    192.168.1.1/32     link#4             UCS            15        0     en0

    192.168.1.1        0:1f:45:62:85:cb   UHLWIir       234      166     en0    199

    192.168.1.1        0:1f:45:62:85:cb   UHLWIir         1        6     en1    963

    192.168.1.1/32     link#6             UCSI            3        0     en1

    192.168.1.40       link#4             UHLWIi          1        0     en0

    192.168.1.40       link#6             UHLWIi          1        0     en1

    192.168.1.41       link#4             UHLWIi          1        0     en0

    192.168.1.41       link#6             UHLWIi          1        0     en1

    192.168.1.54       link#4             UHLWIi          1        0     en0

    192.168.1.54       link#6             UHLWIi          1        0     en1

    192.168.1.58/32    link#4             UCS             1        0     en0

    192.168.1.63       link#4             UHLWIi          1        0     en0

    192.168.1.63       link#6             UHLWIi          1        0     en1

    192.168.1.66       link#4             UHLWIi          1        0     en0

    192.168.1.66       link#6             UHLWIi          1        0     en1

    192.168.1.73       link#4             UHLWIi          1        0     en0

    192.168.1.73       link#6             UHLWIi          1        0     en1

    192.168.1.78       link#4             UHLWIi          1        0     en0

    192.168.1.78       link#6             UHLWIi          1        0     en1

    192.168.1.90       link#4             UHLWIi          1        0     en0

    192.168.1.90       link#6             UHLWIi          1        0     en1

    192.168.1.111      link#4             UHLWIi          1        0     en0

    192.168.1.111      link#6             UHLWIi          1        0     en1

    192.168.1.114      link#4             UHLWIi          1        0     en0

    192.168.1.114      link#6             UHLWIi          1        0     en1

    192.168.1.116      link#4             UHLWIi          1        0     en0

    192.168.1.116      link#6             UHLWIi          1        0     en1

    192.168.1.118      link#4             UHLWIi          1        0     en0

    192.168.1.118      link#6             UHLWIi          1        0     en1

    192.168.1.122      link#4             UHLWIi          1        0     en0

    192.168.1.122      link#6             UHLWIi          1        0     en1

    192.168.1.123      link#4             UHLWIi          1        0     en0

    192.168.1.123      link#6             UHLWIi          1        0     en1

    192.168.1.132      link#4             UHLWIi          1        0     en0

    192.168.1.132      link#6             UHLWIi          1        0     en1

    192.168.1.136      link#4             UHLWIi          1        0     en0

    192.168.1.136      link#6             UHLWIi          1        0     en1

    192.168.1.139      link#4             UHLWIi          1        0     en0

    192.168.1.139      link#6             UHLWIi          1        0     en1

    192.168.1.148      80:e6:50:28:dd:42  UHLWIi          1       14     en0    931

    192.168.1.148      80:e6:50:28:dd:42  UHLWIi          1       15     en1    932

    192.168.1.151      0:27:10:1e:96:dc   UHLWIi          1        0     en0   1164

    192.168.1.155/32   link#6             UCS             1        0     en1

    192.168.1.160      link#4             UHLWIi          1        0     en0

    192.168.1.160      link#6             UHLWIi          1        0     en1

    192.168.1.166      link#4             UHLWIi          1        0     en0

    192.168.1.166      link#6             UHLWIi          1        0     en1

    192.168.1.169      link#4             UHLWIi          1        0     en0

    192.168.1.169      link#6             UHLWIi          1        0     en1

    192.168.1.173      link#4             UHLWIi          1        0     en0

    192.168.1.173      link#6             UHLWIi          1        0     en1

    192.168.1.174      link#4             UHLWIi          1        0     en0

    192.168.1.174      link#6             UHLWIi          1        0     en1

    192.168.1.175      link#4             UHLWIi          1        0     en0

    192.168.1.175      link#6             UHLWIi          1        0     en1

    192.168.1.176      link#4             UHLWIi          1        0     en0

    192.168.1.176      link#6             UHLWIi          1        0     en1

    192.168.1.180      link#4             UHLWIi          1        0     en0

    192.168.1.180      link#6             UHLWIi          1        0     en1

    192.168.1.186      link#4             UHLWIi          1        0     en0

    192.168.1.186      link#6             UHLWIi          1        0     en1

    192.168.1.189      link#4             UHLWIi          1        0     en0

    192.168.1.189      link#6             UHLWIi          1        0     en1

    192.168.1.190      link#4             UHLWIi          1        0     en0

    192.168.1.190      link#6             UHLWIi          1        0     en1

    192.168.1.192      link#4             UHLWIi          1        0     en0

    192.168.1.192      link#6             UHLWIi          1        0     en1

    192.168.1.194      link#4             UHLWIi          1        0     en0

    192.168.1.194      link#6             UHLWIi          1        0     en1

    192.168.1.201      link#4             UHLWIi          1        0     en0

    192.168.1.201      link#6             UHLWIi          1        0     en1

    192.168.1.203      link#4             UHLWIi          1        0     en0

    192.168.1.203      link#6             UHLWIi          1        0     en1

    192.168.1.212      link#4             UHLWIi          1        0     en0

    192.168.1.212      link#6             UHLWIi          1        0     en1

    192.168.1.217      link#4             UHLWIi          1        0     en0

    192.168.1.217      link#6             UHLWIi          1        0     en1

    192.168.1.219      link#4             UHLWIi          1        0     en0

    192.168.1.219      link#6             UHLWIi          1        0     en1

    192.168.1.221      link#4             UHLWIi          1        0     en0

    192.168.1.221      link#6             UHLWIi          1        0     en1

    192.168.1.222      link#4             UHLWIi          1        0     en0

    192.168.1.222      link#6             UHLWIi          1        0     en1

    192.168.1.224      link#4             UHLWIi          1        0     en0

    192.168.1.224      link#6             UHLWIi          1        0     en1

    192.168.1.228      link#4             UHLWIi          1        0     en0

    192.168.1.228      link#6             UHLWIi          1        0     en1

    192.168.1.229      link#4             UHLWIi          1        0     en0

    192.168.1.229      link#6             UHLWIi          1        0     en1

    192.168.1.236      link#4             UHLWIi          1        0     en0

    192.168.1.236      link#6             UHLWIi          1        0     en1

    192.168.1.239      link#4             UHLWIi          1        0     en0

    192.168.1.239      link#6             UHLWIi          1        0     en1

    192.168.1.247      0:18:fe:a0:5e:58   UHLWIi          2     4312     en0   1196

    192.168.1.253      link#4             UHLWIi          1        0     en0

    192.168.1.253      link#6             UHLWIi          1        0     en1

    192.168.1.255      link#4             UHLWbI          1       88     en0

    224.0.0            link#4             UmCS            2        0     en0

    224.0.0            link#5             UmCSI           1        0     en5

    224.0.0            link#6             UmCSI           1        0     en1

    224.0.0.251        1:0:5e:0:0:fb      UHmLWI          1        0     en0

    255.255.255.255/32 link#4             UCS             1        0     en0

    255.255.255.255/32 link#5             UCSI            1        0     en5

    255.255.255.255/32 link#6             UCSI            1        0     en1