The following products have shown a tendency to become unavailable on the network. This will only happen in certain specific circumstances, during network disconnection and reconnections. If these products become unavailable, they will require a physical reboot to be come reconnected. This problem is characterized by the ability to ping the device, but the inability to bring up the Web User-Interface, and the inability to telnet to the product.
Digi-One RealPort 50000723-01
PortServer TS-2 50000723-02
PortServer TS-4 50000723-03
Digi-One RealPort (Module) 50000723-04
PortServer TS-4 (AutoZone) 50000723-05
To correct this problem, Digi Engineering has suggested that Customers use the command line interface set the ‘tcpip’ value of ‘rto_max’ to a number between 5 and 8. To accomplish this, a telnet or serial command line connection is required. The connection must be logged in as “root” and the following command be given to the device:
#> set tcpip rto_max=8
The device must be rebooted for this command to take effect.