ELSA LANCOM Business LC-4X00, Руководство пользователя

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Operating modes and functions
ELSA LANCOM Business
60
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Network:
The address of the WAN. This is not the address of the destination network, but a
third address which represents the network between the two networks to be
connected. Thus the following applies:
LAN address 1
≠
WAN address 1 = WAN address 2
≠
LAN address 2
≠
LAN addr.1
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Binding:
This is where you set which Ethernet binding is to be used on the WAN. This entry
is only effective if the layer for this connection supports Ethernet encapsulation.
802.3 is assumed if the entry is missing.
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Propagated:
A filter for type 20 IPX packets (NetBIOS propagated frames). The Network Basic
Input/Output System was originally developed for IBM, and has since also been
used by Microsoft in a modified form. This protocol provides services such as name
resolution, data protection and correct packet sequencing (secure protocol) in layers
3 and 4 of the OSI model. NetBIOS packets have a special packet type and socket
(propagated packets). NetBIOS is primarily used to exchange data between stations
on a local network (LAN).
These IPX packets can be excluded from transmission or routed using the 'Filter'
property. The 'Route' property transmits the packets if a connection to the remote
station concerned is active or a free channel is available for the establishment of an
additional connection. The propagated frames are rejected if all the lines to other
remote stations are busy.
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Backoff:
The IPX router uses a special algorithm (exponential backoff) to keep the connection
costs arising in the case of erroneous configurations as low as possible.
The backoff function should be switched off if there is no server available on the
remote station network (e.g. in the case of remote access from a workstation) (see
also exponential backoff).
The default setting is 'On'.
What happens when data is transmitted on an IPX network?
When a device logs on to an IPX network, it first sends a request for the Service
Advertising Protocol (SAP) and locates the nearest available server (get nearest server
request) in the network numbered '00000000'. A router or server located on this network
responds to this request and sends the correct network number.
The servers also regularly transmit information regarding which services they offer and
which other networks they can reach. They use the special data packets complying with
the Service Advertising Protocol or the Routing Information Protocol (RIP).