Enterasys Networks CSX7000 Manuel d'utilisateur télécharger pdf (Page 199)

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Central Site Remote Access Switch 199

ONFIGURING

EVICE

EVEL

ATABASES

On-node Device Entries

COMPRESSION CONFIGURATION ELEMENTS

DEVICE COMPRESSION STATUS

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.

Note: Currently applies only to devices which connect using the PPP protocol.

TARTING PPP STAC- LZS SEQUENCE NUMBER

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.

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.

As its name implies, this option is only used when the device connects using the PPP protocol.

ON-NODE DEVICE DATABASE BACKGROUND INFORMATION

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.

N-NODE DEVICE DATABASE SECURITY REQUIREMENTS

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.

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.

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Enterasys Networks CSX7000 Manuel d'utilisateur Page 199

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