With an ART kernel, programs using UPNP/DLNA (which use multicast) aren't working correctly. Sorry I don't have a simple test method, but it looks like outgoing packets aren't making it out to the network, and I'm not sure how to debug further.
The best methods I can come up with are: 1. run minidlna (needs multicast=YES, set network_interface and add a media_dir entry in /etc/minidlna.conf, then start it) and point some client at it (for testing I'm using bubbleupnp on android, I've also used this with other clients). or 2. point tools from gupnp-tools at some media server (again bubbleupnp in android is useful here, while it's running it acts as a server as well as a client, or use minidlna on another machine). you can see devices easily with the X11 tools gupnp-universal-cp and gupnp-av-cp, again the multicast reject route mustn't be installed. (note, if you try running these while minidlna or some other program is already using the ports, it will fail). Route tables included for completeness, but I don't think there is any material difference between them. In this case I want the class D range routed to vlan5 rather than to my default route's destination so I have used "route add 224/4 -interface 10.15.5.2". netstat -rnfinet, ART kernel Internet: Destination Gateway Flags Refs Use Mtu Prio Iface default 82.68.199.142 UGS 2 2213 - 8 vlan2 10.0.0/24 10.0.0.141 UC 1 0 - 4 vlan6 10.0.0.138 30:91:8f:9e:ad:8c UHLc 1 10 - 4 vlan6 10.0.0.141 f8:b1:56:ac:32:76 UHLl 0 4 - 1 vlan6 10.0.0.255 10.0.0.141 UHb 0 0 - 1 vlan6 10.15.3/24 10.15.3.67 UC 3 2 - 4 trunk0 10.15.3.3 b0:b2:dc:63:18:4d UHLc 0 61 - 4 trunk0 10.15.3.4 90:f6:52:26:2a:89 UHLc 0 68 - 4 trunk0 10.15.3.5 5c:f4:ab:af:1c:36 UHLc 0 61 - 4 trunk0 10.15.3.67 f8:b1:56:ac:32:76 UHLl 0 1488 - 1 trunk0 10.15.3.255 10.15.3.67 UHb 0 0 - 1 trunk0 10.15.5/24 10.15.5.2 UC 10 310 - 4 vlan5 10.15.5.1 00:00:5e:00:01:05 UHLc 0 605 - 4 vlan5 10.15.5.2 f8:b1:56:ac:32:76 UHLl 1 1853 - 1 vlan5 10.15.5.6 c4:01:7c:35:4a:50 UHLc 1 264 - 4 vlan5 10.15.5.10 24:a4:3c:7c:c0:87 UHLc 5 81 - 4 vlan5 10.15.5.13 04:4f:aa:0c:3a:e0 UHLc 0 343 - 4 vlan5 10.15.5.15 c0:3f:d5:6c:2d:64 UHLc 0 285 - 4 vlan5 10.15.5.16 00:0b:dc:00:5b:d3 UHLc 0 330 - 4 vlan5 10.15.5.25 48:44:f7:af:a7:d2 UHLc 0 253 - 4 vlan5 10.15.5.27 cc:fa:00:f3:d6:34 UHLc 0 27 - 4 vlan5 10.15.5.32 f8:b1:56:b0:df:e7 UHLc 0 76 - 4 vlan5 10.15.5.254 00:25:90:c0:77:b4 UHLc 0 287 - 4 vlan5 10.15.5.255 10.15.5.2 UHb 2 125 - 1 vlan5 82.68.199.128/28 82.68.199.130 UC 4 241 - 4 vlan2 82.68.199.130 f8:b1:56:ac:32:76 UHLl 4 4615 - 1 vlan2 82.68.199.131 00:00:24:c2:e1:f8 UHLc 0 33 - 4 vlan2 82.68.199.132 00:0d:b9:14:30:ec UHLc 1 98 - 4 vlan2 82.68.199.137 00:04:13:23:26:6c UHLc 0 76 - 4 vlan2 82.68.199.142 00:25:90:c0:77:b4 UHLc 2 852 - 4 vlan2 82.68.199.143 82.68.199.130 UHb 3 64 - 1 vlan2 127/8 127.0.0.1 UGRS 0 0 32768 8 lo0 127.0.0.1 127.0.0.1 UHl 31 17460 32768 1 lo0 224/4 10.15.5.2 US 0 228 - 8 vlan5 .. same without ART. Internet: Destination Gateway Flags Refs Use Mtu Prio Iface default 82.68.199.142 UGS 8 724 - 8 vlan2 10.0.0/24 10.0.0.141 UC 1 0 - 4 vlan6 10.0.0.138 30:91:8f:9e:ad:8c UHLc 1 3 - 4 vlan6 10.0.0.141 f8:b1:56:ac:32:76 UHLl 0 3 - 1 vlan6 10.0.0.255 10.0.0.141 UHb 0 0 - 1 vlan6 10.15.3/24 10.15.3.67 UC 2 0 - 4 trunk0 10.15.3.3 b0:b2:dc:63:18:4d UHLc 0 1 - 4 trunk0 10.15.3.5 5c:f4:ab:af:1c:36 UHLc 0 1 - 4 trunk0 10.15.3.67 f8:b1:56:ac:32:76 UHLl 0 3 - 1 trunk0 10.15.3.255 10.15.3.67 UHb 0 0 - 1 trunk0 10.15.5/24 10.15.5.2 UC 6 232 - 4 vlan5 10.15.5.2 f8:b1:56:ac:32:76 UHLl 0 82 - 1 vlan5 10.15.5.6 c4:01:7c:35:4a:50 UHLc 0 183 - 4 vlan5 10.15.5.10 24:a4:3c:7c:c0:87 UHLc 6 38 - 4 vlan5 10.15.5.15 c0:3f:d5:6c:2d:64 UHLc 0 167 - 4 vlan5 10.15.5.25 48:44:f7:af:a7:d2 UHLc 0 128 - 4 vlan5 10.15.5.27 cc:fa:00:f3:d6:34 UHLc 0 13 - 4 vlan5 10.15.5.90 link#8 UHLc 0 9 - 4 vlan5 10.15.5.255 10.15.5.2 UHb 2 99 - 1 vlan5 82.68.199.128/28 82.68.199.130 UC 3 111 - 4 vlan2 82.68.199.130 f8:b1:56:ac:32:76 UHLl 5 1237 - 1 vlan2 82.68.199.131 00:00:24:c2:e1:f8 UHLc 0 24 - 4 vlan2 82.68.199.132 00:0d:b9:14:30:ec UHLc 2 10 - 4 vlan2 82.68.199.142 00:25:90:c0:77:b4 UHLc 1 326 - 4 vlan2 82.68.199.143 82.68.199.130 UHb 3 60 - 1 vlan2 127/8 127.0.0.1 UGRS 0 0 32768 8 lo0 127.0.0.1 127.0.0.1 UHl 26 2240 32768 1 lo0 224/4 10.15.5.2 US 0 0 - 8 vlan5
