Cabletron Systems Cabletron CyberSWITCH CSX5500, Руководство пользователя

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USER’S GUIDE
430 CyberSWITCH
F
RAME
R
ELAY
C
ONNECTIONS
To verify a frame relay connection to the CyberSWITCH, the WAN lines that are connected to the
System must be available for use, and the routing option must be properly initialized. To verify a
frame relay connection, perform the following:
1. Enter the
frame relay stats
command at the administration console.
a. If the statistics display appears, the frame relay feature is configured and the frame relay
subsystem should be operational.
b. If you receive the message:
No Frame Relay Accesses configured,
verify your
configuration. Refer to Frame Relay Accesses in the Configuring Alternate Accesses chapter.
2. Enter the
cs
command at the administration console. The device name for the associated PVC
should appear in the list of connected sites.
3. Check the report log (
dr
) for additional messages. If you see any of the following, you may
have a problem:
Unexpected error during transmission of LMI frame
[FR_IETF] Authentication Failure of remote device “NAME”
[FR_IETF] Off-node Authentication Failure of remote device “NAME”
Try the following:
a. If the system displays the
Unexpected error during transmission of LMI
frame
message: Use CFGEDIT to change the Frame Relay LMI type. Refer to Configuring
General Access Information in the Configuring Alternate Accesses chapter.
b. If the system displays one of the following messages:
[FR_IETF] Authentication Failure of remote device “NAME”
[FR_IETF] Off-node Authentication Failure of remote device “NAME”
It indicates that the device database does not have a device entry corresponding to the per-
manent virtual circuit. Use CFGEDIT to change the PVC name to match the remote device
name. Refer to
Configuring a PVC in the Configuring Alternate Accesses chapter.
PPP L
INK
F
AILURE
D
ETECTION
To verify that Frame Relay’s Link Failure Detection is enabled, perform a trace to view the Echo-
Request and Reply packets:
1. With the feature enabled, establish a connection.
2. Erase the system log (
er
command).
3. Issue the
trace ppp on
console command.
4. Wait for at least the configured Echo Frequency.