Segmented permanent virtual circuits
First Claim
Patent Images
1. A method comprising:
- receiving via a frame relay network a first frame relay packet that includes link status information for a plurality of virtual circuits that each share a first data link connection identifier;
generating a second frame relay packet that conforms to a standard local management interface status message format using the link status information in the first frame relay packet; and
transmitting the second frame relay packet to customer premise equipment.
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Accused Products
Abstract
An apparatus and method for communicating link status information for permanent virtual circuits that share a data link connection identifier. A first frame relay packet that includes link status information for a plurality of virtual circuits that each share a first data link connection identifier is received via a frame relay network. Using the link status information in the first frame relay packet, a second frame relay packet that conforms to a standard local management interface status message format is generated. The second frame relay packet is transmitted to customer premise equipment.
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Citations
27 Claims
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1. A method comprising:
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receiving via a frame relay network a first frame relay packet that includes link status information for a plurality of virtual circuits that each share a first data link connection identifier;
generating a second frame relay packet that conforms to a standard local management interface status message format using the link status information in the first frame relay packet; and
transmitting the second frame relay packet to customer premise equipment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13)
packing the first frame relay packet with link status information according to either a first format or a second format depending on which is more compact; and
transmitting the first frame relay packet via the frame relay network.
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9. The method of claim 8 wherein packing the first frame relay packet according to the first format comprises packing link status bits in respective bit positions of the first frame relay packet to indicate to which of the plurality of virtual circuits each of the link status bits pertains.
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10. The method of claim 8 wherein packing the first frame relay packet according to the second format comprises packing link status bits together with identifying values that indicate to which of the plurality of virtual circuits each of the link status bits pertains.
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11. The method of claim 1 wherein generating the second frame relay packet comprises including in the second frame relay packet a respective data link connection identifier for each of the plurality of virtual circuits that share the first data link connection identifier.
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13. The method of claim 11 further comprising the steps of
receiving the third frame relay frame and the fourth frame relay frame; -
looking up the first data link connection identifier and the second data link connection identifier from respective look-up table entries indicated by the first and second multiplexing values in the third frame relay frame and the fourth frame relay frame, respectively; and
transmitting contents of the third frame relay frame to a second routing device in a fifth frame relay frame that includes the first data link connection identifier.
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12. A method comprising:
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receiving from a first routing device a first frame relay frame having a first data link connection identifier and a second frame relay frame having a second data link connection identifier, the first data link connection identifier being different from the second data link connection identifier;
looking up a first multiplexing value and a second multiplexing value from respective look-up table entries indicated by the first data link connection identifier and the second data link connection identifier; and
transmitting contents of the first frame relay frame across a frame relay network in third frame relay frame that includes a third data link connection identifier and the first multiplexing value; and
transmitting contents of the second frame relay frame across the frame relay network in a fourth frame relay frame that includes the third data link connection identifier and the second multiplexing value.
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14. A method comprising:
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receiving a first frame relay packet that includes link status information for each of a plurality of permanent virtual circuits that share a common data link connection identifier;
looking up respective data link connection identifiers for the plurality of permanent virtual circuits; and
transmitting the looked-up data link connection identifiers and the link status information to a routing device in a second frame relay packet. - View Dependent Claims (15, 16)
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17. A frame relay access device comprising:
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receive logic to receive via a frame relay network a first frame relay packet that includes link status information for a plurality of virtual circuits that each share a first data link connection identifier;
status message generation logic to generate a second frame relay packet that conforms to a standard local management interface status message and that includes the link status information in the first frame relay packet; and
a transmitter to transmit the second frame relay packet to customer premise equipment. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A frame relay access device comprising:
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means for receiving via a frame relay network a first frame relay packet that includes link status information for a plurality of virtual circuits that each share a first data link connection identifier;
means for generating a second frame relay packet that conforms to a standard local management interface format using the link status information in the first frame relay packet; and
means for transmitting the second frame relay packet to customer premise equipment. - View Dependent Claims (25, 26, 27)
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Specification