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Frame Relay Subinterfaces
13-14 PortMaster Configuration Guide
Troubleshooting Subinterfaces
Packets received on a subinterface can be identified as belonging to that subinterface
only if the DLCI is properly entered in the DLCI table for that location. If you are having
problems, do the following:
• Wait a few moments. Subinterfaces come up after the primary interface. This
process can take a few moments.
• Check the list of DLCIs tied to each location using the show location
Locname
command.
• Verify the DLCI list on a location using the show arp
Interface
command, replacing
Interface
with the name of the interface. A list of interfaces can be shown with the
ifconfig command.
• Always reset the port after changing the DLCI list.
• Verify that all DLCIs are accounted for by checking the DLCI list for your primary
interface. If you enter the wrong DLCI for the subinterface, the DLCI for the
subinterface is applied to the primary interface if LMI or Annex-D is in use.
• Enter the following two commands to view the LMI or Annex-D keepalives:
Command> set console s1
Command> set debug 0x51
After you verify that the proper keepalives are being received, enter the following
commands to turn off the debug utility:
Command> set debug off
Command> reset console
• If you have a Cisco router on the other end of your connection, verify that it is set
for encapsulation
frame-relay ietf for the serial interface; otherwise, the Cisco
frame-relay map command for your DLCI must have the ietf keyword appended.