[foxboro] Nodebus/CBLAN/Mesh problem - relatively sudden load increase last night overwhelming CBLAN

From: "Fitzgerrell, Kevin" <Kevin_Fitzgerrell@xxxxxxx>
To: <foxboro@xxxxxxxxxxxxx>
Date: Wed, 25 Feb 2009 16:35:42 +0900

Hi all,
 

We've got 10 nodes on CBLAN and 4 nodes with ATS on Mesh (one bridge
node included included in both numbers).

 

We've been struggling with load on several CBLANs that are up at or near
the max that the modules can handle - well over the Foxboro upper
limits.

 

Something suddenly happened on one of my nodes last night and my actual
packet rate across its CBLAN went up dramatically.  I'm seeing lots of
65 byte packets on the bridge node, all going one way from the Mesh to
the CBLAN.

 

The following is an example:

 

0000  00 00 6c 00 01 ff 00 00  6c c0 80 9c 00 33 fe 7e   ..l.....
l....3.~

0010  c0 81 25 01 00 1c 00 30  00 00 0d 49 30 30 30 31   ..%....0
...I0001

0020  30 37 08 00 20 b4 f5 3c  0d 49 30 30 30 31 31 32   07.. ..<
.I000112

0030  00 00 6c c0 2f 62 0a 80  22 15 2c cc 8b c3 02 eb   ..l./b..
".,.....

0040  08

 

This is coming from a "snoop" on my bridge node:

 

The packet's Ethernet addressing originates at the ATS in my bridge node
(00.00.6C.C0.80.9C) and is going to the CBLAN in my bridge node
(00.00.6C.00.01.FF) - as expected, nearly all the packets on my bridge
go between the ATS and the CBLAN.

 

The packet is coming from my C4 Node (on Mesh with ATS), NSAP 000107
(30.30.30.31.30.37), from gateway GW2SM2 (00.00.6C.C0.2F.62).

The NSAP of the bridge node is 000112 (30.30.30.31.31.32).  The ultimate
packet destination is the AW on my C3Flotation node AW301F
(80.00.20.B4.F5.3C).

 

In a 200 second data collection period, I have 400 packets exactly like
this coming from GW2SM1 to AW301F, one every 0.5 seconds, and many many
others coming from other controllers on the mesh.  

 

Normally I see about the same traffic going each direction, but during
the overloading it looks like most of the traffic between the Mesh and
my C3Flotation node is mostly coming from the Mesh - I had 78000 packets
going from the Mesh to C3Flotation node, and only 6400 packets going
from C3Flotation to the Mesh, although it's possible I'm dropping
packets.

 

Any ideas as to what these packets are?

 

Regards,

 

Kevin FitzGerrell

 

 

 


 
 
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[foxboro] Nodebus/CBLAN/Mesh problem - relatively sudden load increase last night overwhelming CBLAN

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