Creating a static ethernet connection, once again

Sunday, 5 October 2014

Sorry to be a bother, but ...

To recap. I have an ethernet port that's wired to a HDTV tuner that converts OTA HDTV
to ma4 and streams it down the cable to a program that collects and stores it. All of this
is known to work under Fedora 17. No so under Fedora 19.  FirewallD is stopped.

The ethernet port has a ifcfg script with 
    HWADDR="E8:40:F2:05:DE:1C"
    BOOTPROTO=none
    IPADDR="198.168.20.5"
but is otherwise as created by Anaconda.

To test the interface, one asks the tuner to say what connections it has, hdhomerun_config
discover. This is the basic interface. Tracking this with Wireshark, I see:

Frame 1: 62 bytes on wire (496 bits), 62 bytes captured (496 bits) on interface 0
Ethernet II, Src: Pegatron_05:de:1c (e8:40:f2:05:de:1c), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Internet Protocol Version 4, Src: 198.168.20.5 (198.168.20.5), Dst: 198.168.20.255
(198.168.20.255)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00: Not-ECT (Not
ECN-Capable Transport))
    Total Length: 48
    Identification: 0x30b2 (12466)
    Flags: 0x02 (Don't Fragment)
    Fragment offset: 0
    Time to live: 64
    Protocol: UDP (17)
    Header checksum: 0x53b6 [validation disabled]
    Source: 198.168.20.5 (198.168.20.5)
    Destination: 198.168.20.255 (198.168.20.255)
    [Source GeoIP: Unknown]
    [Destination GeoIP: Unknown]
User Datagram Protocol, Src Port: 32798 (32798), Dst Port: 65001 (65001)
    Source port: 32798 (32798)
    Destination port: 65001 (65001)
    Length: 28
    Checksum: 0xb682 [validation disabled]
Data (20 bytes)

0000  00 02 00 0c 01 04 00 00 00 01 02 04 ff ff ff ff   ................
0010  4e 50 7f 35                                       NP.5

I interpret this as saying that I sent 20 bytes of data via the UDP protocol from
198.168.20.5 to anybody on the 198.168.20 subnet. As I received no response, presumably
that's not what I wanted to do.

Is this significant? I can ping 198.168.20.5 successfully, but Wireshark does not see any
packets.

Thanks.