USER’S GUIDE
554 CyberSWITCH
•
Echo Reply
The Echo Reply is transmitted in response to an Echo Request. The Echo Reply packet
contains the magic number of the sending device. Until the magic number option has
been negotiated the value must be set to zero.
•
Discard Request
The Discard request packet is transmitted by a device to exercise the data link layer
processing. This packet is silently discarded by the receiving device.
WAN FR_IETF T
RACE
M
ESSAGES
You can trace Frame Relay (FR_IETF) incoming and outgoing packets. This FR_IETF trace
information is placed into the Report log, which can be accessed by using the
dr
command. Enable
this feature by using the
wan fr-ietf trace on
command, and disable it with
wan fr-ietf
trace off
. You can specify the direction of the packets (
in
or
out
), a particular device or PVC
(
<device>
or
<fr_accessname_dlci>
) and the protocol (
AT
,
BR
,
IP
, or
IPX
) to be traced.
The following is the format of a FR_IETF trace line as it is displayed by
dr
:
[packet direction]: [device name or fr_accessname_dlci] [protocol] size:[NN]
where:
[packet direction]
Indicates the packet direction. IN means received packet, OUT means transmitted packet.
[device name or fr_accesname_dlci]
Indicates the device or Frame Relay PVC associated with the traced data.
[protocol]
Identifies the protocol type of the traced data. Protocol types are AT (AppleTalk), BR (MAC
Layer Bridge), IP, and IPX.
[NN]
Identifies the size of the data in bytes.
X.25 T
RACE
M
ESSAGES
It is now possible to trace X.25 incoming and outgoing packets. This X.25 trace information is placed
into the Report log, which can be accessed by using the
dr
command. Enable this feature by using
the
trace x25 on
command, and disable it with
trace x25 off
.
X.25 T
RACE
M
ESSAGE
S
UMMARY
In - X25 Call Connect LCN <logical channel number>, <number of bytes> bytes
The DTE has accepted an incoming SVC call.
In - X25 Clear Ind LCN <logical channel number>, <number of bytes> bytes
An SVC call has been cleared by the DCE.
