System information

Troubleshooting Frame Relay
Book Title
18-404
DLCI
5
inactive or deleted Step 1 Use the show frame-relay pvc exec command to view the status of the
interface’s PVC.
Step 2 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.
DLCI assigned to wrong
subinterface
Step 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
command to delete the incorrect DLCI number entry under the interface.
Use the frame-relay map 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
Step 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
4 IETF = Internet Engineering Task Force
5 DLCI = Data Link Connection Identifier
6 PVC = permanent virtual circuit
Possible Problem Solution