21
On a
UNIX
host, create an entry in the host’s ARP table and substitute the intended IP
address and the hardware address of the Terminal Server, then ping the Terminal Server.
This process typically requires superuser privileges.
Figure 5-1:
ARP and Ping on UNIX
In order for the ARP command to work on
Windows
, the ARP table on the PC must have
at least one IP address defined other than its own. If the ARP table is empty, the command
will return an error message. Type ARP -A at the DOS command prompt to verify that there
is at least one entry in the ARP table.
Figure 5-2:
ARP and Ping on Windows
Note:
There should be replies from the IP address if the ARP command
worked.
When the Terminal Server receives the ping packet, it will notice that its IP address is not
set and will send out broadcasts to see if another node is using the specified address. If no
duplicate is found, the Terminal Server will use the IP address and will respond to the ping
packet.
The Terminal Server will not save the learned IP address permanently; this procedure is
intended as a temporary measure to enable EZWebCon to communicate with the Terminal
Server, or allow an administrator to Telnet into the Terminal Server. Once logged in, the
administrator can enter the
Change IPaddress
command to make the address permanent.
Figure 5-3:
Configuring Permanent IP Address
Any host wishing to access the Terminal Server will have to be told the Terminal Server’s
IP address. This is typically configured in the unix file
/etc/hosts
or via a nameserver. Refer
to the host’s documentation for additional information.
# arp -s 192.0.1.228 00:80:a3:xx:xx:xx
% ping 192.0.1.228
C:\ ARP -S 192.0.1.228 00-80-A3-XX-XX-XX
C:\ PING 192.0.1.228
% telnet 192.0.1.228
Trying 192.0.1.228
Black Box LESx Version n.n/n (yymmdd)
Type Help at the ‘Local_>’ prompt for assistance.
Enter Username> gopher
Local> SET PRIVILEGED
Password> system (not echoed)
Local>> DEFINE IPADDRESS 192.0.1.228
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