[VLAN] Vlan is inactive

Rui Cristo rui_alisson at yahoo.com.br
Wed Apr 26 21:31:14 PDT 2006


Hi all,
   
  I`m trying to create a simple VLAN and make the traffic from a socket go through this interface and leave the device tagged.
Here is the configuration:
-----------------------------------------------------------------------------------------------
# modprobe 8021q
# vconfig add eth0 10
# ifconfig eth0 10 192.168.80.149 up
# ifconfig
  eth0      Link encap:Ethernet  HWaddr 00:11:25:88:AB:12
          inet addr:192.168.80.143  Bcast:192.168.80.255  Mask:255.255.255.0
          inet6 addr: fe80::211:25ff:fe88:ab12/64 Scope:Link
          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:14474 errors:853 dropped:0 overruns:0 frame:853
          TX packets:19960 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4931508 (4.7 Mb)  TX bytes:19059455 (18.1 Mb)
  eth0.10   Link encap:Ethernet  HWaddr 00:11:25:88:AB:12
          inet addr:192.168.80.149  Bcast:192.168.80.255  Mask:255.255.255.0
          inet6 addr: fe80::211:25ff:fe88:ab12/64 Scope:Link
          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:484 (484.0 b)
  lo        Link encap:Local Loopback ...
          
-----------------------------------------------------------------------------------------------
   -> I want to bind this VLAN to a socket, to send packets tagged through it.
 I bind it with IP:
  -----------------------------------------------------------------------------------------------
 myaddr.sin_family = AF_INET;
 myaddr.sin_port = htonl(PORT);
 inet_aton("192.168.80.149", &myaddr.sin_addr.s_addr);
   if( (bind(sockfd, (struct sockaddr*)&myaddr, sizeof(struct sockaddr))) < 0 )
 {
  printf ("erro bind: %d\n", ret);
  close(sockfd);
  exit(-1);
 }
-----------------------------------------------------------------------------------------------
 The problem is that the sent packets contain the source address 192.168.80.149 but the traffic is sent only by eth0, the eth0.10 is inactive. Even trying to see the packets with ethereal in Capture->Interfaces the eth0.10 seems to be inactive.
 How can I send packets through eth0.10 to "TAG" the traffic.
 I have already tried to "DOWN" eth0 but doesn`t work (and the computer crashes).
   
   Thanks

		
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