Enterasys csx5500 用户指南
Central Site Remote Access Switch 199
C
ONFIGURING
D
EVICE
L
EVEL
D
ATABASES
On-node Device Entries
C
OMPRESSION
C
ONFIGURATION
E
LEMENTS
D
EVICE
C
OMPRESSION
S
TATUS
Allows you to enable or disable compression for the individual device. If this option is enabled,
then the CyberSWITCH will negotiate compression with this device. Otherwise, the system will not
negotiate compression with this device, leaving the compression resources available for other
devices. When adding a new device, this option derives its value from the default device
compression option.
then the CyberSWITCH will negotiate compression with this device. Otherwise, the system will not
negotiate compression with this device, leaving the compression resources available for other
devices. When adding a new device, this option derives its value from the default device
compression option.
Note:
Currently applies only to devices which connect using the PPP protocol.
S
TARTING
PPP STAC- LZS S
EQUENCE
N
UMBER
When using the PPP compression with the STAC-LZS protocol, certain devices may not adhere to
the protocol specification’s requirement that sequence numbers begin with 1, resulting in a
resynchronization sequence on the first frame which is exchanged. When the peer fully supports
the CCP protocol’s Reset mechanism, this will only result in the minor inconvenience of a lost frame
at the beginning of a session. However, if such a device’s resynchronization mechanism is to
completely renegotiate CCP (as has been witnessed in testing with some vendors’ devices), this
sequence will repeat infinitely.
the protocol specification’s requirement that sequence numbers begin with 1, resulting in a
resynchronization sequence on the first frame which is exchanged. When the peer fully supports
the CCP protocol’s Reset mechanism, this will only result in the minor inconvenience of a lost frame
at the beginning of a session. However, if such a device’s resynchronization mechanism is to
completely renegotiate CCP (as has been witnessed in testing with some vendors’ devices), this
sequence will repeat infinitely.
This option provides a way to override the starting sequence number used when connecting to
such devices. When adding a new device, this option derives its value from the system-wide
Starting PPP STAC-LZS Sequence Number, presented previously in the system-wide compression
configuration section. In the majority of cases, it will not be necessary to modify this value.
such devices. When adding a new device, this option derives its value from the system-wide
Starting PPP STAC-LZS Sequence Number, presented previously in the system-wide compression
configuration section. In the majority of cases, it will not be necessary to modify this value.
As its name implies, this option is only used when the device connects using the PPP protocol.
O
N
-
NODE
D
EVICE
D
ATABASE
B
ACKGROUND
I
NFORMATION
The On-node Device Table is a set of valid devices that can access the network resources connected
to the system. The On-node Device Table contains a symbolic name for the device and a unique
identifier that is used to enforce device security. The On-node Device Table is referenced when at
least one device level system security option is enabled.
to the system. The On-node Device Table contains a symbolic name for the device and a unique
identifier that is used to enforce device security. The On-node Device Table is referenced when at
least one device level system security option is enabled.
O
N
-
NODE
D
EVICE
D
ATABASE
S
ECURITY
R
EQUIREMENTS
The following sections provide the On-node Device Table configuration requirements for possible
security option configurations for each category of remote device. Categories are defined by the
operating mode (bridging or routing), and the line protocol in use.
security option configurations for each category of remote device. Categories are defined by the
operating mode (bridging or routing), and the line protocol in use.
Bridging with HDLC Bridge Devices
To allow a Bridge device to connect to the CyberSWITCH, you must have MAC Layer Bridging
enabled. For each HDLC bridge device using this type of connection, you may need to enter the
Device Name, Calling Line Id, Remote Bridge Ethernet Address, and Password.
enabled. For each HDLC bridge device using this type of connection, you may need to enter the
Device Name, Calling Line Id, Remote Bridge Ethernet Address, and Password.