Enterasys Networks CSX6000 - Manual (Page 243)

Central Site Remote Access Switch 243
C ONFIGURING A LTERNATE A CCESSES
Dedicated Accesses
D EDICATED A CCESS C ONFIGURATION E LEMENTS
L INES
The line that will be used for the dedicated access. A dedicated access can be defined on either a
BRI, a PRI, a network V.35, or a network RS232 line.
B EARER C HANNELS
For BRI and PRI lines only. Also referred to as B channels. B channels can carry voice or data in
either direction.
C LOCKING T YPE
For V.35 and RS232 lines only. Clocking types can be either external or internal. Dedicated
connections usually use external clocking.
L INE P ROTOCOL
Designates the type of line protocol that will be used on the dedicated connection. PPP line protocol
is the correct selection for most configurations. HDLC protocol may work for devices that only
support HDLC protocol.
D EVICE N AME (O PTIONAL )
Optional parameter. The device name of the device assigned to this dedicated connection. The
device name may be up to 17 characters in length, and is case sensitive. If you configure this
parameter, and, in addition, turn off outbound authentication for this device, no authentication will
be needed for this particular device. If you do not configure this parameter, device authorization is
required for the device.
D EDICATED A CCESS B ACKGROUND I NFORMATION
To access dedicated network connections, there must be a physical connection between the
network and the CyberSWITCH. The dedicated access defines how the CyberSWITCH will use this
physical connection.
The dedicated connection is used in addition to any switched connections that can be made to
provide overflow data capacity to the remote device. The dedicated connection is brought up at
initialization time. The Throughput Monitor starts monitoring the dedicated connection for an
overload condition. When link utilization causes an overload condition, additional switched
connections will be made to the remote device based on the data rate configured for that device.
When the link utilization causes an underload condition, the switched connections will be released
with the dedicated connection remaining active.
Switched connections can also be used to provide backup connectivity to the remote device in case
the dedicated connection fails. If the dedicated connection goes down, and there is network traffic,
switched connections will be made to the remote device based on the data rate configured for that
device thus providing backup for the dedicated connection. When the dedicated connection comes
back up, it will be aggregated together with any switched connections that may be active.
When the link utilization causes an underload condition, the switched connections will be released
with the dedicated connection remaining active.
Device level authentication must be enabled for dedicated accesses to properly identify the remote
device and provide switched backup and overflow to that device.