3com MSR 20-20 참조 매뉴얼
391
Description
Use the fr lmi n391dte command to configure N391 parameter at the DTE side.
Use the undo fr lmi n391dte command to restore the default.
By default, the parameter value is 6.
The DTE sends a Status-Enquiry packet at regular interval set by T391 to the DCE.
There are two types of Status-Enquiry packets: link integrity authentication packet
and link status enquiry packet. The N391 parameter defines the ratio of sending
the two types of packets, that is, link integrity authentication packets: link status
enquiry packets = (N391 - 1): 1.
There are two types of Status-Enquiry packets: link integrity authentication packet
and link status enquiry packet. The N391 parameter defines the ratio of sending
the two types of packets, that is, link integrity authentication packets: link status
enquiry packets = (N391 - 1): 1.
Example
# Set DTE as the operating mode of frame relay interface Serial 2/0, and the
counter value of the PVC status to 10.
counter value of the PVC status to 10.
<Sysname> system-view
[Sysname] interface serial2/0
[Sysname-Serial2/0] link-protocol fr
[Sysname-Serial2/0] fr interface-type dte
[Sysname-Serial2/0] fr lmi n391dte 10
fr lmi n392dce
Syntax
fr lmi n392dce n392-value
undo fr lmi n392dce
View
Interface view
Parameter
n392-value: The Error threshold, which ranges from 1 to 10.
Description
Use the fr lmi n392dce command to set N392 parameter at the DCE side.
Use the undo fr lmi n392dce command to restore the default.
By default, the parameter value is 3.
The DCE requires the DTE to send a Status-Enquiry packet at regular interval (set
by T392). If the DCE does not receive the Status-Enquiry packet within a period of
time, the error counter on DCE increments by one. If the errors exceed the
threshold, the DCE would consider the physical channels and all the DLCIs to be
unavailable.
by T392). If the DCE does not receive the Status-Enquiry packet within a period of
time, the error counter on DCE increments by one. If the errors exceed the
threshold, the DCE would consider the physical channels and all the DLCIs to be
unavailable.
N392 and N393 together define the “error threshold”. N393 defines the event
number observed and N392 defines the error threshold of that number (N393).
That is, if number of errors that occurred to the DCE reaches N392 in N393 events,
DCE will consider the errors have reached the threshold and declare the physical
channels and all DLCIs to be unavailable.
number observed and N392 defines the error threshold of that number (N393).
That is, if number of errors that occurred to the DCE reaches N392 in N393 events,
DCE will consider the errors have reached the threshold and declare the physical
channels and all DLCIs to be unavailable.
N392 should be less than N393.