DT Etherlink IV
User Manual
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FC [ON/OFF] [N=1-4]
IRATE [speed/OFF] [N=1-4]
ERATE [speed/OFF]
CRATE [speed] [CoS] [WAN]
COS [QOS/VLAN] [N] [0..3/OFF]
TRAPIP [ADD/DEL] x.x.x.x
COMMUNITY
SNMPSET [ON/OFF]
NETDEFAULT
CONNECT [N:[1-13/R]]
M(AIN)
H(ELP)
Table 4.1 Command structure according to ITU-T Rec. M.3400 (Telecommunication Management
Networks)
4.2
Etherlink_IV Software
Every Etherlink_IV device stores up to two software versions in the memory (EEPROM): one
unchangeable software (standby software No.1) and one upgradeable software (software No.2).
Two versions are necessary to prevent any device failure due to downloading of faulty or damaged
software or due to hardware failure during downloading of the new software.
During downloading, the new software overwrites the upgradeable software. If the new software
downloading via X-modem is successful, a message appears that the modem should be restarted to
start operating under the new software. After the restart, i.e., when the new version of the upgraded
software is started for the first time, the operator should confirm the downloaded software. After
confirmation, this software becomes unchangeable. If downloading was interrupted or there was a
failure in the data transmission, a message is displayed. In this case, if the data has already been
partially downloaded into the modem and the upgradeable software is damaged, the unchangeable
software will be used to start the modem (please repeat the downloading of the software).
By default, the upgradeable software is the basic one, if it was confirmed. If the upgradeable
software was not confirmed after the first start or it was damaged (invalid data format, incorrect
checksum), the standby software is loaded.
4.3
Configuration and Application Storage
The whole system stores four configurations: running configuration, startup configuration, new
configuration and backup configuration.
The
running configuration
contains all configuration values guarantee the current operation of the
device. If two modems have the same version of the software and the same running configuration
they should operate equally. The running configuration is stored in the RAM of the device. The
current parameters determine the operation until the next restart or any actions on the running
configuration (storage and etc.). During initialization the initial parameters of the running
configuration are loaded from the startup configuration.
The
startup configuration
contains all configuration values which will be used to configure the
device after its restart. The startup configuration is stored in EEPROM and is used to initialize the
running configuration during the system start-up.
The
new configuration
stores changes in configuration parameters combined into groups of
parameters that require a confirmation of changes (i.e., this configuration stores setting, which
should be confirmed after being changed, for example, IP-address of the device). The new
configuration is stored in the device RAM. After setting all necessary changes from the group, the
system administrator confirms changes in the group, and values belonging to this group are written
from the new configuration into the running one. In this case, the simultaneous application of all
setting in the group is guaranteed.
The
backup configuration
is a backup of the current configuration. The backup configuration is
stored in the EEPROM. During the configuration restoration, values from the backup configuration
are copied to the startup configuration.
