System and method for selecting a least cost path for performing a network boot in a data center network environment

Patent metadata

Field	Value
Publication number	US-9280359-B2
Application number	US-201213711031-A
Country	US
Kind code	B2
Filing date	Dec 11, 2012
Priority date	Dec 11, 2012
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

A method is provided in one example embodiment and includes logging in to a multipath target via first and second boot devices instantiated on a network device, the first and second boot devices respectively connected to the multipath target via first and second paths; determining which of the first and second paths comprises a least cost path; and booting the operating system via the least cost path. The determining may include comparing network statistics of the first path with network statistics of the second path, the network statistics comprising at least one of packet loss on the path, errors encountered via the path, and congestion on the path.

First claim

What is claimed is:

1. A method, comprising:
logging in to a multipath target via first and second boot devices instantiated on a network device, the first and second boot devices respectively connected to the multipath target via first and second paths;
determining which of the first and second paths comprises a least cost path;
determining whether boot LUN discovery was successful via the determined least cost path;
if boot LUN discovery was successful via the determined least cost path, booting an operating system via the determined least cost path; and
if boot LUN discovery was not successful via the determined least cost path, booting the operating system via the other one of the first and second paths.

2. The method of claim 1 , wherein the determining further comprises comparing network statistics of the first path with network statistics of the second path.

3. The method of claim 2 , wherein the network statistics comprise at least one of packet loss on the path, errors encountered via the path, and congestion on the path.

4. The method of claim 1 , wherein the determining further comprises determining an amount of time needed to perform boot logical unit number (“LUN”) discovery via each of the first and second paths.

5. The method of claim 1 , wherein the booting comprises installing a boot firmware table on the least cost path.

6. The method of claim 1 , wherein the first and second boot devices comprise network virtual interface cards (“vNICs”) instantiated by a virtualized adapter.

7. The method of claim 1 , wherein the first and second boot devices comprise virtual host bus adapters (“vHBAs”) instantiated by a virtualized adapter.

8. The method of claim 1 , wherein the multipath target comprises a storage array.

9. Logic encoded in one or more non-transitory tangible media that includes code for execution and when executed by a processor is operable to perform operations comprising:
logging in to a multipath target via first and second boot devices instantiated on a network device, the first and second boot devices respectively connected to the multipath target via first and second paths;
determining which of the first and second paths comprises a least cost path;
determining whether boot LUN discovery was successful via the determined least cost path;
if boot LUN discovery was successful via the determined least cost path, booting an operating system via the determined least cost path; and
if boot LUN discovery was not successful via the determined least cost path, booting the operating system via the other one of the first and second paths.

10. The logic of claim 9 , wherein the determining further comprises comparing network statistics of the first path with network statistics of the second path, the network statistics comprising at least one of packet loss on the path, errors encountered via the path, and congestion on the path.

11. The logic of claim 9 , wherein the determining further comprises determining an amount of time needed to perform boot LUN discovery via each of the first and second paths.

12. The logic of claim 9 , wherein the first and second boot devices are instantiated on the network device using a virtualized adapter and comprise one of virtual network interface cards (“vNICs”) and virtual host bus adapters (“vHBAs”).

13. A network device, comprising:
a memory element configured to store data;
a processor operable to execute instructions associated with the data; and
a boot firmware module coupled to the processor, wherein the network device is configured to:
cause first and second boot devices instantiated on the network device to log in to a multipath target via first and second paths, respectively;
determine which of the first and second paths comprises a least cost path;
determine whether boot LUN discovery was successful via the determined least cost path;
if boot LUN discovery was successful via the determined least cost path, boot an operating system via the determined least cost path; and
if boot LUN discovery was not successful via the determined least cost path, boot the operating system via the other one of the first and second paths.

14. The network device of claim 13 , wherein the determining comprises comparing network statistics of the first path with network statistics of the second path, the network statistics comprising at least one of packet loss on the path, errors encountered via the path, and congestion on the path.

15. The network device of claim 13 , wherein the determining comprises determining an amount of time needed to perform boot LUN discovery via each of the first and second paths.

16. The network device of claim 13 , wherein the first and second boot devices are instantiated on the network device using a virtualized adapter and comprise one of virtual network interface cards (“vNICs”) and virtual host bus adapters (“vHBAs”).

17. The network device of claim 13 , wherein the multipath target comprises a storage array and the network device comprises a server.

Assignees

• Venkiteswaran Manikantan
• Sidhartha Kumar
• Bhatt Mehul J
• Cisco Tech Inc

Inventors

• Venkiteswaran Manikantan
• Sidhartha Kumar
• Bhatt Mehul J

Classifications

• G06F9/4416 Primary

  Network booting; Remote initial program loading [RIPL] · CPC title

• G06F9/4401

  Bootstrapping (security arrangements therefor G06F21/57) · CPC title