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[NOAAPORT #YJE-806765]: new LDM server ingesting NOAAPort feed



Rodger,

First thing: are you seeing any "gap" or "missing frame" messages from 
noaaportIngester(1) in the LDM log file?

> I’m trying to set up a new LDM server to ingest our NOAAPort feed. It’s 
> running on
> Ubuntu 16.04 with LDM version ldm-6.13.1. It’s ingesting and processing 
> products, but
> tcpdump is showing packet issues:
> 
> 13:59:57.769495 IP 10.0.9.51.34586 > 224.0.1.1.1201: UDP, bad length 4032 > 
> 1472
> 13:59:57.769647 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.770605 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.771487 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.772283 IP 10.0.9.51.34586 > 224.0.1.1.1201: UDP, bad length 2397 > 
> 1472
> 13:59:57.774520 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.775168 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.776143 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.776493 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.776585 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.777016 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.777236 IP 10.0.9.51.34586 > 224.0.1.1.1201: UDP, bad length 4032 > 
> 1472
> 13:59:57.777820 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.777919 IP 10.0.9.51 > 224.0.1.1: ip-proto-17
> 13:59:57.778035 IP 10.0.9.51.34586 > 224.0.1.1.1201: UDP, length 1207
> 
> Here’s the ifconfig output:
> 
> ifconfig eth1
> eth1      Link encap:Ethernet  HWaddr 00:15:c5:f4:78:24
> inet addr:10.0.0.72  Bcast:10.0.0.255  Mask:255.255.255.0
> inet6 addr: fe80::215:c5ff:fef4:7824/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> RX packets:7369043 errors:0 dropped:0 overruns:0 frame:0
> TX packets:169 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:10065696198 (10.0 GB)  TX bytes:18130 (18.1 KB)
> Interrupt:17
> 
> I’ve tried setting in /etc/sysctl.conf net.ipv4.ipfrag_max_dist to 0, 1472, 
> 4096, and
> 8192 with no change in behavior. Did reboots after changing just to be sure. 
> The
> net.ipv4.conf.default.rp_filter is set to 2.
> 
> Our Novra S300N is running the latest firmware (Rev 15).
> 
> The proper entries are in ldmd.conf:
> 
> EXEC  "noaaportIngester -m 224.0.1.1"
> EXEC  "noaaportIngester -m 224.0.1.2"
> EXEC  "noaaportIngester -m 224.0.1.3"
> EXEC  "noaaportIngester -m 224.0.1.4"
> EXEC  "noaaportIngester -m 224.0.1.5"
> EXEC  "noaaportIngester -m 224.0.1.6"
> EXEC  "noaaportIngester -m 224.0.1.7"
> EXEC  "noaaportIngester -m 224.0.1.8”
> 
> Finally, here are the entries in /etc/network/interfaces for the port:
> 
> auto eth1
> iface eth1 inet static
> address 10.0.0.72
> netmask 255.255.255.0
> network 10.0.0.0
> broadcast 10.0.0.255
> up route add -net 224.0.0.0 netmask 240.0.0.0 gw 10.0.0.72 dev eth1
> 
> The above entries are legacy ones from the setup done years ago by the vendor 
> we used
> prior to switching the LDM with the builtin NOAAPort ingesting.
> 
> What do you see in any of the above is not correct? By the way, the 
> documentation at
> http://www.unidata.ucar.edu/software/ldm/ldm-current/utilities/noaaport/index.html
>  needs
> updating to reflect the 10 multicast addresses that are now available (11 if 
> you count
> NWWS). Also, the networking changes that are required are not discussed. I’m 
> sure that
> few folks are putting in their own dishes anymore, but it would help anyone 
> starting
> from zero to have all the relevant steps and settings.
> 
> I searched the support archives but could not find any resolution to my 
> problem of the
> packet losses. It’s strange because it appears that I’m getting products 
> based on
> ldmd.log and checking actual products here and there.
> 
> Any help would be appreciated!

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: YJE-806765
Department: Support NOAAPORT
Priority: Normal
Status: Closed
===================
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