Methods and systems for overlapping protection domain in network devices

1. A machine implemented method, comprising:

receiving at an adapter, data with a first type of error protection code from a host memory of a computing device;

adding by the adapter a second type of error protection code to the data before removing the first type of error protection code;

generating by the adapter, a frame header for the data with a protocol specific protection code and a third type of error protection code, where the third type of error protection code is generated without using any frame header field that can change after the data is transmitted by the adapter via a network link;

encrypting by the adapter, the data, the protocol specific protection code and the third type of error protection code; and

transmitting by the adapter, the encrypted data with encrypted protocol specific protection code and encrypted third type of error protection code to a receiving adapter communicating with the adapter by the network link.

2. The method of claim 1 , wherein the first type of error protection code is a local cyclic redundancy code (LCRC).

3. The method of claim 1 , wherein the protocol specific protection code is a Fibre Channel cyclic redundancy code (FC-CRC).

4. The method of claim 1 , wherein the third type of error protection code is a cyclic redundancy code (CRC).

5. The method of claim 1 , wherein the frame header is a Fibre Channel header.

6. The method of claim 1 , wherein an encapsulating security payload (ESP) header and trailer is added by the adapter to the encrypted data transmitted using the network link.

7. The method of claim 1 , wherein the third type of error protection code is embedded as padding in the transmitted encrypted data.

8. A non-transitory, machine readable storage medium having stored thereon instructions for performing a method, comprising machine executable code which when executed by at least one machine, causes the machine to:

receive at an adapter, data with a first type of error protection code from a host memory of a computing device;

add by the adapter a second type of error protection code to the data before removing the first type of error protection code;

generate by the adapter, a frame header for the data with a protocol specific protection code and a third type of error protection code, where the third type of error protection code is generated without using any frame header field that can change after the data is transmitted by the adapter via a network link;

encrypt by the adapter, the data, the protocol specific protection code and the third type of error protection code; and

transmit by the adapter, the encrypted data with encrypted protocol specific protection code and encrypted third type of error protection code to a receiving adapter communicating with the adapter by the network link.

9. The non-transitory storage medium of claim 8 , wherein the first type of error protection code is a local cyclic redundancy code (LCRC).

10. The non-transitory storage medium of claim 8 , wherein the protocol specific protection code is a Fibre Channel cyclic redundancy code (FC-CRC).

11. The non-transitory storage medium of claim 8 , wherein the third type of error protection code is a cyclic redundancy code (CRC).

12. The non-transitory storage medium of claim 8 , wherein the frame header is a Fibre Channel header.

13. The non-transitory storage medium of claim 8 , wherein an encapsulating security payload (ESP) header and trailer is added by the adapter to the encrypted data transmitted using the network link.

14. The non-transitory storage medium of claim 8 , wherein the third type of error protection code is embedded as padding in the transmitted encrypted data.

15. A system comprising:

a processor executing instructions out of a memory and interfacing with an adapter, wherein the adapter is configured to receive, data with a first type of error protection code from the memory; add a second type of error protection code to the data before removing the first type of error protection code; generate a frame header for the data with a protocol specific protection code and a third type of error protection code, where the third type of error protection code is generated without using any frame header field that can change after the data is transmitted by the adapter via a network link; encrypt the data, the protocol specific protection code and the third type of error protection code; and transmit the encrypted data with encrypted protocol specific protection code and encrypted third type of error protection code to a receiving adapter communicating with the adapter by the network link.

16. The system of claim 15 , wherein the first type of error protection code is a local cyclic redundancy code (LCRC).

17. The system of claim 15 , wherein the protocol specific protection code is a Fibre Channel cyclic redundancy code (FC-CRC).

18. The system of claim 15 , wherein the third type of error protection code is a cyclic redundancy code (CRC).

19. The system of claim 15 , wherein the frame header is a Fibre Channel header.

20. The system of claim 15 , wherein an encapsulating security payload (ESP) header and trailer is added by the adapter to the encrypted data transmitted using the network link and the third type of error protection code is embedded as padding in the transmitted encrypted data.