[VLAN] multicast issues

[Anthony Benjammin DeNardo III]

1) root at tv-desktop:~# cat /proc/net/vlan/config
VLAN Dev name    | VLAN ID
Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
eth1.182       | 182  | eth1
root at tv-desktop:~# ifconfig -a
eth1      Link encap:Ethernet  HWaddr 00:0E:0C:6B:FA:7D
          inet addr:129.82.201.60  Bcast:129.82.201.255  Mask:255.255.255.0
          inet6 addr: fe80::20e:cff:fe6b:fa7d/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:728652 errors:0 dropped:0 overruns:0 frame:0
          TX packets:332640665 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:522045270 (497.8 MiB)  TX bytes:2787308359 (2.5 GiB)

eth1.182  Link encap:Ethernet  HWaddr 00:0E:0C:6B:FA:7D
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:22 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1100 (1.0 KiB)  TX bytes:0 (0.0 b)

2)  MULTICAST works on my primary interface (eth1)
3) MULTICAST does NOT work on my virtual interface (eth1.182)
4)  root at tv-desktop:~# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

did I answer your questions? 

ad3

Srinivas Varadaraj wrote:
> I have had some problems with vlans as well if you refer to my old
> posts. As far as multicasts go, 
> 1) make sure that /proc/net/vlans/configs shows that the vlan device is
> pointing to the same vlan ie eth0.182 should show 182 as the vlan 
> 2) look for MULTICAST on your primary interface ie eth0
> 3) look for MULTICAST on your virtual interface eth0.182.
> 4) Check / write rules for eth0.182 in your iptables.
> -sri
>
>
> -----Original Message-----
> From: vlan-bounces at candelatech.com [mailto:vlan-bounces at candelatech.com]
> On Behalf Of Anthony Benjammin DeNardo III
> Sent: Friday, December 01, 2006 12:20 PM
> To: vlan at candelatech.com
> Subject: [VLAN] multicast issues
>
> I have a linux box (kernel=2.6.15-27-386, hostname=encoder) with several
>
> Hauppauge encoders.  it has an Intel Etherexpress Pro 100 NIC.  when a 
> client on the same subnet (not only the same subnet, but physically 
> connected to the same switch) as encoder requests a multicast generated 
> by encoder, all works fine. 
>
> however, when I add a vlan to encoder:
>
> vconfig add eth0 182
>
> ifconfig -a indicates that eth0.182 has been created.  then, if a client
>
> on the 182 subnet (vlan 182 trunked through the same switch as before) 
> requests the multicast, it cannot receive it.  I sniffed the traffic, 
> and there are no IGMP messages being sent out the 182 interface of the 
> encoder. 
>
> then, I assigned an IP address to the eth0.182 interface.  repeated the 
> multicast, and the client still could not receive it.  there was still 
> no IGMP traffic on the 182 interface.  this means that the IGMP join 
> request generated by the client was never received by the eth0.182 
> interface on the encoder.
>
> how do I get IGMP to work on my vlan interface?
>
>   

-- 
=========================================================
| Anthony Ben'jammin' DeNardo III                       |
| Network Multimedia Architect                          |
| Academic Computing & Networking Services              |
| Colorado State University                             |
| 970-297-3710                                          |
| ad3 at ColoState.EDU                                     |
========================================================= 

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