Method and apparatus for a high-speed frame tagger
View Patent ↗A method is described including extracting protocol information from a received packet within a framer, comparing the protocol information in a first pass to predetermined values to produce a first result, and tagging the packet based on the set of results.
1. A computer-implemented method comprising:
extracting protocol information from plural portions of a received packet within a framer;
performing a hierarchical comparison of the extracted protocol information with expected protocol values, wherein the hierarchical comparison comprises:
performing a first-priority comparison of first extracted protocol information from a first portion of the packet; and
performing a second-priority comparison of second extracted protocol information from a second portion of the packet; and
assigning a tag to the packet based on the hierarchical comparison,
wherein the first-priority comparison indicates no match for the first extracted protocol information, and wherein the tag comprises a default tag.
2. The method of claim 1 , wherein the default tag is assigned independent of the result of the second-priority comparison.
3. The method of claim 1 , further comprising:
extracting protocol information from plural portions of an additional received packet within the framer;
performing an additional hierarchical comparison of the protocol information extracted from the additional received packet with expected protocol values, wherein the additional hierarchical comparison comprises:
performing an additional first-priority comparison of additional first extracted protocol information from a first portion of the additional received packet; and
performing an additional second-priority comparison of additional second extracted protocol information from a second portion of the additional received packet; and
assigning an additional tag to the additional received packet based on the additional hierarchical comparison,
wherein the additional first-priority comparison indicates a match for the additional first extracted protocol information, and wherein the additional tag varies based on the result of the additional second-priority comparison.
4. A computer-implemented method comprising:
extracting protocol information from plural portions of a received packet within a framer;
performing a hierarchical comparison of the extracted protocol information with expected protocol values, wherein the hierarchical comparison comprises:
performing a first-priority comparison of first extracted protocol information from a first portion of the packet; and
performing plural lower-priority comparisons of additional extracted protocol information from additional portions of the packet; and
assigning a tag to the packet based on the hierarchical comparison,
wherein the first-priority comparison indicates no match for the first extracted protocol information, and wherein the tag comprises a default tag.
5. The method of claim 4 , wherein the default tag is assigned independent of the results of the plural lower-priority comparisons.
6. The method of claim 4 , further comprising:
extracting protocol information from plural portions of an additional received packet within the framer;
performing an additional hierarchical comparison of the protocol information extracted from the additional received packet with expected protocol values, wherein the additional hierarchical comparison comprises:
performing an additional first-priority comparison of additional first extracted protocol information from a first portion of the additional received packet; and
performing plural additional lower-priority comparisons; and
assigning an additional tag to the additional received packet based on the additional hierarchical comparison,
wherein the additional first-priority comparison indicates a match for the additional first extracted protocol information, and wherein the additional tag varies based on the results of the plural additional lower-priority comparisons.
7. A computing device comprising computer-readable storage media having stored thereon computer-executable instructions configured to cause the computing device to:
extract protocol information from plural portions of a received packet within a framer;
perform a hierarchical comparison of the extracted protocol information with expected protocol values, wherein the hierarchical comparison comprises:
a first-priority comparison of first extracted protocol information from a first portion of the packet; and
a second-priority comparison of second extracted protocol information from a second portion of the packet; and
assign a tag to the packet based on the hierarchical comparison,
wherein the first-priority comparison indicates no match for the first extracted protocol information, and wherein the tag comprises a default tag.
8. The computing device of claim 7 , wherein the default tag is assigned independent of the result of the second-priority comparison.
9. The computing device of claim 7 , wherein the computer-executable instructions are further configured to cause the computing device to:
extract protocol information from plural portions of an additional received packet within the framer;
perform an additional hierarchical comparison of the protocol information extracted from the additional received packet with expected protocol values, wherein the additional hierarchical comparison comprises:
an additional first-priority comparison of additional first extracted protocol information from a first portion of the additional received packet; and
an additional second-priority comparison of additional second extracted protocol information from a second portion of the additional received packet; and
assign an additional tag to the additional received packet that varies based on the result of the additional second-priority comparison if the additional first-priority comparison indicates a match for the additional first extracted protocol information.
10. A computing device comprising computer-readable storage media having stored thereon computer-executable instructions configured to cause the computing device to:
extract protocol information from plural portions of a received packet within a framer;
perform a hierarchical comparison of the extracted protocol information with expected protocol values, wherein the hierarchical comparison comprises:
a first-priority comparison of first extracted protocol information from a first portion of the packet; and
plural lower-priority comparisons of additional extracted protocol information from additional portions of the packet; and
assign a tag to the packet based on the hierarchical comparison,
wherein the first-priority comparison indicates no match for the first extracted protocol information, and wherein the tag comprises a default tag.
11. The computing device of claim 10 , wherein the default tag is assigned independent of the results of the plural lower-priority comparisons.
12. The computing device of claim 10 , wherein the computer-executable instructions are further configured to cause the computing device to:
extract protocol information from plural portions of an additional received packet within the framer;
perform an additional hierarchical comparison of the protocol information extracted from the additional received packet with expected protocol values, wherein the additional hierarchical comparison comprises:
an additional first-priority comparison of additional first extracted protocol information from a first portion of the additional received packet; and
plural additional lower-priority comparisons; and
assign an additional tag to the additional received packet that varies based on the results of the plural additional lower-priority comparisons if the additional first-priority comparison indicates a match for the additional first extracted protocol information.