GE IC695ETM001 Manual page 16

16
GFK-2332W
Subject
SRTP Connections Remain
Open After IP Address Changed
RX3i CPU Time Used for
Produced EGD Timestamps
ENIU Stale Data During Run
Mode Store of EGD
One TTL value configuration
for all EGD groups
Protection against attack on
FTP server
RX3i Ethernet Interface Module IC695ETM001-HV IPI
Ethernet Operational Notes
The Ethernet Interface does not terminate all open SRTP connections
before changing its IP address. Once the local IP address has changed,
any existing open TCP connections are unable to normally terminate. This
can leave SRTP connections open until their underlying TCP connections
time out. If quicker recovery of the SRTP connection is needed, modify the
"wkal_idle" Advanced User Parameter to reduce the TCP keep alive timer
down to the desired maximum time for holding open the broken
connection. Refer to TCP/IP Ethernet Communications for PACSystems,
GFK-2224, for details.
Changing the Ethernet interface time via the CHTIME command does not
affect the timestamp value within EGD exchanges produced from this
Ethernet interface. The EGD timestamp value reflects the current CPU
time. In Series 90-70 products and the Series 90-30 CPU364, EGD
timestamps are taken from the Ethernet interface and do reflect CHTIME
modifications.
In a large PPS system running 20 ENIUs, when a Run-mode Store is
performed that deletes the EGD exchanges for 10 of the ENIUs, the other
ENIUs will see the status on their exchanges indicate consumption
timeouts during the RMS. At the completion of the RMS, the exchanges
operate normally.
The system accepts only one TTL value. If you configure a separate TTL
value for each EGD group, the minimum TTL value is configured for all EGD
groups.
When the FTP connection is not in use, the configuration parameter,
Maximum FTP Server Connections should be set to 0. This protects against
attack on FTP server.
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Description
February 2016