The configuration of a backup connection via a modem at the serial interface requires first of all an entry in the Dialup-Peers list so that the required remote site can be reached. The following entries will also be required for the configuration of the LANCOM:
- Entry in the backup table In the backup table, generate an entry for the remote site that is to be used for the backup connection. This remote site is to be allocated to the remote site that is to be called by the modem at the serial interface. The backup table is to be found under the following paths:
LANconfig: Communication / Call Management / Backup Table
WEBconfig: LCOS menu tree / Setup / WAN E Backup table
- Entry in the polling table If the link to the remote station that is to be backed up cannot be checked by LCP polling (with PPP only) then an additional entry in the polling table is required. This involves assigning the remote site with an IP address that can be regularly tested with a ping command. The IP address should typically be a computer directly at the opposite end of the connection being tested, e.g. a DNS server in your provider's network. The polling table is to be found under the following paths:
LANconfig: Communication / Remote Sites / Polling Table
WEBconfig: LCOS menu tree / Setup / WAN E Polling table