User`s guide

250
that is unavailable, the router will try its backup IP address and so on. To make this
example more concrete, say the original IP address is 192.168.0.1 with a backup IP address
of 192.168.0.2, then setting the IP address in the next row to 192.168.0.2 with a backup IP
address of 192.168.0.3 will cause the router to try all these IP addresses in succession.
Note:
The length of time that it takes for a connection to an IP address to fail is determined by the
Connect timeout parameter on the Configuration – Network > Advanced Network
Settings > Socket Settings web page.
Related CLI Commands
Entity
Instance
Parameter
Values
Equivalent Web Parameter
ipbu n IPaddr
Valid IP address
a.b.c.d
IP Address a.b.c.d
ipbu n BUIPaddr
Valid IP address
a.b.c.d
Backup IP Address a.b.c.d
ipbu n retrysec 0 - 2147483648 Retry Time s (seconds)
ipbu n donext OFF,ON Try Next
sarsys 0 dest
Valid IP address
a.b.c.d
Send “Backup IP” system
messages to IP address a.b.c.d
Legacy Protocols
Configuration – Network > Legacy protocol
Older protocols that existed before TCP/IP became dominant are often referred to as legacy
protocols. Examples of legacy protocols are X.25, SNA and LAPB.
Digi TransPort routers are capable of connecting to legacy networks such as X.25. They are
also capable of simulating a legacy network so that equipment that in the past would have
connected to a legacy network can connect to the Digi TransPort router instead. Thus old
equipment can be connected to modern networks such as HSUPA.
The Configuration – Network > Legacy protocol menu has the following sub-menu
options:
• Legacy Protocols TPAD
• X.25
• MODBUS
SNA over IP
Configuration – Network > Legacy protocol> SNA over IP
The unit is capable of sending Systems Network Architecture (SNA) traffic over TCP/IP,
using the DLSw protocol, this is often called SNAIP. The unit is also capable of sending
HDLC traffic over TCP/IP.