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A network of GCM-86000s with EtherNet NIMs does not have bi-directional communications between all GCM/ NIMs.

Issue

A network of GCM-86000s with EtherNet NIMs does not have bi-directional communications between all GCM/ NIMs. It is a shared network with routers.  Some symptoms reported include:

  1. A GCM/ NIM may be able to send to some GCM/ NIMs,  but not  to others.
  2. A GCM/ NIM may be able to receive data from some GCM/NIMs, but not from others.
  3. A GCM/ NIM may be able to send to a GCM/NIM, but not receive data from that GCM/NIM.
  4. You might be able to "ping" all GCM/NIMs on the network, and ACCESS all of them from the GCM menu, but still have issues as in 1-3 above.

Environment

  • GCM-86000 series (including LNC-100, SIM-CCN, SIM-MTECH, SIM-TRANE, and SIM-YORK)
  • EtherNet NIM (GCM-ETH-001)
  • Shared (customer's) EtherNet LAN with routers

Cause

In the NIM block of one or more of the affected GCM/ NIMs, the IP Multicast address (IPMLT) is set incorrectly. In the following example, the  NIM block parameters were taken from a network of four GCM/NIMs, experiencing all four of the issues noted above.

 

 

GCM#1

GCM#2

GCM#3

GCM#4

 

5.4A

5.3A

5.4A

5.4A

 

11.2T

11.2T

11.2T

11.2T

PNLIP

010.020.000.028

010.020.000.019

010.020.004.008

010.020.004.009

RTRIP

010.020.000.001

010.020.000.001

010.020.000.001

010.020.000.001

DIRSV

010.020.000.028

010.020.000.028

010.020.000.028

010.020.000.028

ETHML

01.20.96.01.00.00

01.20.96.01.00.00

01.20.96.01.00.00

01.20.96.01.00.00

IPMLT

010.020.000.019

010.020.000.019

010.020.000.019

010.120.000.019

IPSUB

255.255.000.000

255.255.000.000

255.255.000.000

255.255.000.000

UDPPT

1235

1235

1235

1235

Resolution

On a shared network with routers, the IP Multicast address (IPMLT) should be the same as the Panel IP address (PNLIP);
IPMLT = PNLIP.

  1. Using the appropriate FLASH clear procedure, and set the NIM block parameters so that IPMLT = PNLIP. In the example below, make the changes to the IPMLT as high-lighted in yellow. 

 

GCM#1

GCM#2

GCM#3

GCM#4

GCM Rev.

5.4A

5.3A

5.4A

5.4A

NIM Rev.

11.2T

11.2T

11.2T

11.2T

PNLIP

010.020.000.028

010.020.000.019

010.020.004.008

010.020.004.009

RTRIP

010.020.000.001

010.020.000.001

010.020.000.001

010.020.000.001

DIRSV

010.020.000.028

010.020.000.028

010.020.000.028

010.020.000.028

ETHML

01.20.96.01.00.00

01.20.96.01.00.00

01.20.96.01.00.00

01.20.96.01.00.00

IPMLT

010.020.000.028

010.020.000.019

010.020.004.008

010.020.004.009

IPSUB

255.255.000.000

255.255.000.000

255.255.000.000

255.255.000.000

UDPPT

1235

1235

1235

1235

See the Nim Networking and Configuration Guide, F-25955-4, Chapter 2, "GCM Shared Network Address Guidelines (Routed Network)" for details.

  1. For EtherNet NIMs with firmware revisions 11.2P or 11.2T, see "Special NIM Address Switch Functions" for the REVISED FLASH clear procedure.
  2. For EtherNet NIMs with firmware revisions 11.1F or earlier, see Lessons Learned Article #5889 for the  FLASH clear procedure.
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