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Slow internet access when two network interfaces are connected


VMatas
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My Hakintosh has 2 network interfaces: one via USB WiFi to internet, and other via Ethernet to LAN with NAS. When LAN interface is connected, internet access is extremely slow. Of course addresses are from different subnets.
May anyone can help solve this problem? Seems that something wrong is with routing tables, etc, etc.... Im changed service order for NICs - no success... 

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Hello, thanks for reply. I can't figure out why sometimes all is Ok and sometimes Safari cant open any web page. 

 

Info about interfaces(en0 - Ethernet, en3 - USB WiFi):

 

VMiMac:~ vmatas$ ifconfig -a
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
	inet 127.0.0.1 netmask 0xff000000 
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
	nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
EHC29: flags=0<> mtu 0
XHC20: flags=0<> mtu 0
EHC26: flags=0<> mtu 0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=6b<RXCSUM,TXCSUM,VLAN_HWTAGGING,TSO4,TSO6>
	ether 74:d4:35:16:0b:3c 
	inet6 fe80::862:fc96:6f1e:614a%en0 prefixlen 64 secured scopeid 0x7 
	inet 192.168.2.5 netmask 0xffffff00 broadcast 192.168.2.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect (1000baseT <full-duplex,flow-control,energy-efficient-ethernet>)
	status: active
en3: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether 50:3e:aa:6c:b4:0b 
	inet6 fe80::14dc:2f96:2675:b698%en3 prefixlen 64 secured scopeid 0x8 
	inet 192.168.1.115 netmask 0xffffff00 broadcast 192.168.1.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
	inet6 fe80::64fd:f0a7:67b1:e6a5%utun0 prefixlen 64 scopeid 0x9 
	nd6 options=201<PERFORMNUD,DAD>

and routing table:

 

Internet:
Destination        Gateway            Flags        Refs      Use   Netif Expire
default            192.168.1.1        UGSc          162        0     en3       
127                localhost          UCS             0        0     lo0       
localhost          localhost          UH             10  1789968     lo0       
169.254            link#8             UCS             0        0     en3      !
169.254            link#7             UCSI            0        0     en0      !
192.168.1          link#8             UCS             3        0     en3      !
192.168.1.1/32     link#8             UCS             1        0     en3      !
192.168.1.1        58:ef:68:b7:60:70  UHLWIir        70        4     en3   1139
192.168.1.115/32   link#8             UCS             1        0     en3      !
192.168.1.133      f0:f6:1c:d4:f4:f4  UHLWI           0        2     en3      !
192.168.1.161      f8:1a:67:27:9f:ee  UHLWI           0        1     en3   1103
192.168.1.255      ff:ff:ff:ff:ff:ff  UHLWbI          0       10     en3      !
192.168.2          link#7             UCS             3        0     en0      !
192.168.2.3        10:bf:48:8c:5d:3c  UHLWIi          1     1261     en0   1098
192.168.2.5/32     link#7             UCS             0        0     en0      !
192.168.2.8        e0:d5:5e:7e:93:e   UHLWIi          1        2     en0   1051
192.168.2.255      ff:ff:ff:ff:ff:ff  UHLWbI          0       14     en0      !
224.0.0/4          link#8             UmCS            1        0     en3      !
224.0.0/4          link#7             UmCSI           1        0     en0      !
224.0.0.251        1:0:5e:0:0:fb      UHmLWI          0        0     en0       
224.0.0.251        1:0:5e:0:0:fb      UHmLWI          0        0     en3       
255.255.255.255/32 link#8             UCS             1        0     en3      !
255.255.255.255/32 link#7             UCSI            0        0     en0      !
broadcasthost      ff:ff:ff:ff:ff:ff  UHLWbI          0       10     en3      !

Internet6:
Destination        Gateway            Flags         Netif Expire
default            fe80::%utun0       UGcI          utun0       
localhost          localhost          UHL             lo0       
fe80::%lo0         fe80::1%lo0        UcI             lo0       
fe80::1%lo0        link#1             UHLI            lo0       
fe80::%en0         link#7             UCI             en0       
vmimac.local       74:d4:35:16:b:3c   UHLI            lo0       
bozenas-imac.local e0:d5:5e:7e:93:e   UHLWIi          en0       
fe80::%en3         link#8             UCI             en3       
vmimac.local       50:3e:aa:6c:b4:b   UHLI            lo0       
fe80::1c49:c314:81 f0:f6:1c:d4:f4:f4  UHLWI           en3       
fe80::%utun0       vmimac.local       UcI           utun0       
vmimac.local       link#9             UHLI            lo0       
ff01::%lo0         localhost          UmCI            lo0       
ff01::%en0         link#7             UmCI            en0       
ff01::%en3         link#8             UmCI            en3       
ff01::%utun0       vmimac.local       UmCI          utun0       
ff02::%lo0         localhost          UmCI            lo0       
ff02::%en0         link#7             UmCI            en0       
ff02::%en3         link#8             UmCI            en3       
ff02::%utun0       vmimac.local       UmCI          utun0       

 

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