Sel SEL-421 - Network Address Resolution; Data Access Settings; IP Network Address Resolution Settings; Ftp

R.4.7
Date Code 20111215 Reference Manual SEL-421 Relay
Communications Interfaces
Communications Card
FAILOVR to N. Only one network port operates at a time. The fail-over mode
operation determines the active port. To use fail-over mode, proceed with the
following steps.
Step 1. Set NETPORT to the preferred network interface.
Step 2. Set FAILOVR to Y.
Step 3. Set FTIME to the desired network port fail-over time.
If the Ethernet card detects a link failure on the primary port, it activates the
standby port after the fail-over time, FTIME, elapses. If the link status on the
primary link returns to normal before the fail-over time expires, the fail-over
timer resets; uninterrupted operation continues on the primary network port.
The Ethernet card checks the primary link periodically and continues
checking until it detects a normal link status. The Ethernet card returns to
operation on the primary link when it detects a normal link status.
Network Address Resolution
The SEL-421 Ethernet card can resolve 20 network host names to
corresponding IP addresses. Settings for Network Address Resolution (NAR)
are shown in Table 4.5. The Ethernet card uses address resolution any place
settings or commands require an IP network name. NAR is similar to DNS
(Domain Name Services) used on the Internet, except that NAR uses a local
name list rather than a remote name server. You can use names rather than
numeric IP addresses for settings like DEFRTR (default router) or when using
the Ethernet card PING command. If a remote network host name (HOST 1–
Host 20) is set NA, then the Ethernet card ignores the corresponding IP
address setting (IPADR 1–IPADR 20).
Data Access Settings
Access data using either the standard TCP/IP Telnet and FTP interfaces or,
optionally, through the DNP3 LAN/WAN or IEC 61850 interface. You cannot
access all data through all interfaces. See the appropriate interface section
below for details on data access.
FTP
FTP is a standard application-level protocol for exchanging files between
computers over a TCP/IP network. The SEL-421 Ethernet card operates as an
FTP server. It presents Ethernet card and host files to FTP clients. The
NOTE: If you change settings for the
host port where the Ethernet card is
installed and the standby network
port is active, the Ethernet card resets
and returns to operation on the
primary port.
Table 4.5 IP Network Address Resolution Settings
Label Description Range Default
HOST1 Remote network host name 16 characters NA
IPADR1 Remote network host IP address IP address NA
HOST 2 Remote network host name 16 characters NA
IPADR2 Remote network host IP address IP address NA
•
•
•
HOST20 Remote network host name 16 characters NA
IPADR20 Remote network host IP address IP address NA