Enterasys csx5500 用户指南
Central Site Remote Access Switch 255
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ONFIGURING
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LTERNATE
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Frame Relay Accesses
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URRENT
X.25 R
ESTRICTIONS
•
X.25 virtual circuits must be two-way logical channels; one-way incoming and one-way out-
going channels are not currently supported.
going channels are not currently supported.
•
Each system can have only one X.25 access. The X.25 access can use only one line.
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A maximum of forty eight virtual circuits can be configured per access. This can be any combi-
nation of PVCs or SVCs. Each virtual circuit counts as one of the system’s available 48 connec-
tions.
nation of PVCs or SVCs. Each virtual circuit counts as one of the system’s available 48 connec-
tions.
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X.25 accesses cannot be changed via Dynamic Management.
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Security must be enabled on the system in order to support X.25 connections.
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Bearer channels which are used by X.25 accesses may not be shared by other access types.
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Support for X.25 Multi-Link Protocol is not provided.
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There can be no aggregation between X.25 virtual circuits and any other type of connections
(for example, ISDN, Dedicated, or Frame Relay).
(for example, ISDN, Dedicated, or Frame Relay).
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The maximum X.25 packet size supported is 1024 bytes.
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RFC877 is the only line protocol supported for X.25 VCs. Therefore, only IP data can be sent
over an X.25 VC.
over an X.25 VC.
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RAME
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ELAY
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CCESSES
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ONFIGURING
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F
RAME
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ELAY
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Notes: You may configure up to 32 frame relay accesses per CyberSWITCH, and a total of 192
PVCs. The number of PVCs you can assign per access is arbitrary, as long as the total
number of PVCs (from all accesses) is not greater than 192.
number of PVCs (from all accesses) is not greater than 192.
Frame relay and X.25 accesses are available only if you have purchased the additional
software module for packet switched accesses.
software module for packet switched accesses.
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SING
CFGEDIT
To add a frame relay access, you need to enter information for the access itself, and also for the
associated PVC. A separate section with instructions for completing the configuration of each
follows.
associated PVC. A separate section with instructions for completing the configuration of each
follows.
Note:
If a default value is provided, use that default value if you are unsure of the value.
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ONFIGURING
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ENERAL
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I
NFORMATION
1.
Select Access from the Physical Resources menu, then follow the onscreen instructions to add a a
frame relay access.
frame relay access.
2.
Enter the Line Id the access will be using.
3.
Select Access Information.
4.
Enter a frame relay access name of 1 to 16 non-blank, alpha-numeric characters. The frame relay
access name is a user-defined name and is provided as an aid in helping you track events
occurring on a Frame Relay Access. (This name will also be reflected in the Device Table Menu
of the associated remote device.)
access name is a user-defined name and is provided as an aid in helping you track events
occurring on a Frame Relay Access. (This name will also be reflected in the Device Table Menu
of the associated remote device.)
5.
Select the data rate from the supplied list of data rates.