Information Technology Reference
In-Depth Information
Table18-1
Frame Relay: Frame Relay Link Is Down (continued)
Possible Problem
Solution
The DLCI
5
is
inactive or has
been deleted.
Use the
show frame-relay pvc
exec command to view the
status of the interface's PVC.
1.
If the output shows that the PVC
6
is inactive or deleted, there
is a problem along the path to the remote router. Check the
remote router or contact your carrier to check the status of
the PVC.
2.
The DLCI is
assigned to the
wrong
subinterface.
1.
Use the
show frame-relay pvc
privileged exec command to
check the assigned DLCIs. Make sure that the correct DLCIs
are assigned to the correct subinterface. If the DLCI is
incorrect, use the
no frame-relay map interface-dlci
command to delete the incorrect DLCI number entry under
the interface. Use the
frame-relay map interface-dlci
interface configuration command to define the mapping
between an address and the correct DLCI used to connect to
the address.
Syntax:
frame-relay map
protocol protocol-address dlci
[
broadcast
]
[
ietf
|
cisco
]
Syntax description:
•
protocol
—Supported protocols: AppleTalk, DECnet, IP,
XNS, IPX, and VINES.
•
protocol-address
—Address for the protocol.
•
dlci
—DLCI number for the interface.
•
broadcast
—(Optional) Broadcasts should be forwarded to
this address when multicast is not enabled.
•
ietf
—(Optional) IETF form of Frame Relay encapsulation.
Use when the communication server is connected to another
vendor's equipment across a Frame Relay network.
•
cisco
—(Optional) Cisco encapsulation method.
Example:
The following example maps IP address 131.108.123.1 to DLCI
100:
interface serial 0
frame-relay map ip 131.108.123.1 100 broadcast
2.
If the DLCIs appear to be correct, shut down the main
interface using the
shutdown
interface configuration
command, and then bring the interface back up using the
no
shutdown
command.
1.
DTE = data terminal equipment
2.
DCE = data circuit-terminating equipment
3.
LMI = Local Management Interface
