Integrated fibre channel support in an ethernet fabric switch

• US 9,699,117 B2
• Filed: 11/05/2012
• Issued: 07/04/2017
• Est. Priority Date: 11/08/2011
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Brocade Communications Systems, Inc. (Broadcom, Inc.)
• Inventors: Koganti, Phanidhar, Vobbilisetty, Suresh
• Primary Examiner(s): Harper, Kevin C
• Application Number:
  US13/669,357
• Publication Number:
  US 20130114600A1
• Time in Patent Office: 1,702 Days
• Field of Search: 370215-405
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 2012/4629 using multilayer switching, e.g. layer 3 switching
• CPC Class Codes: H04L 45/66 Layer 2 routing, e.g. in Ethernet based MAN's
• CPC Class Codes: H04L 49/351 for local area network [LAN], e.g. Ethernet switches
• CPC Class Codes: H04L 49/357 Fibre channel switches

Abstract

One embodiment of the present invention provides a switch. The switch includes a packet processor and a device management module. During operation, the packet processor constructs a notification message containing a Transparent Interconnection of Lots of Links (TRILL) Routing Bridge (RBridge) identifier associated with a Fiber Channel router. The device management module operates in conjunction with the packet processor and terminates TRILL forwarding for a received TRILL packet with the RBridge identifier as an egress RBridge identifier.

Claims

1. A first switch, comprising:

a plurality of ports comprising a first port capable of forwarding based on a first protocol in a network of interconnected switches and a second port capable of forwarding based on a second protocol;

a packet processor configured to;

construct a notification message indicating a physical switch identifier of a second switch, which operates based on the second protocol, as a second switch identifier of a third switch capable of operating based on the first protocol, wherein the physical switch identifier and the second switch identifier are of a same format;

determine the first port as an output port for the notification message, wherein the first port corresponds to another switch; and

determine the second port as an output port for a packet with the physical switch identifier as an egress switch identifier based on the physical switch identifier, wherein the second port corresponds to the second switch.

2. The first switch of claim 1, wherein the packet processor is further configured to extract the packet by decapsulating an encapsulation header associated with the first protocol, wherein the destination address of the encapsulation header corresponds to the third switch.

3. The first switch of claim 2, wherein the packet is a Fibre Channel packet, and wherein the second switch is a Fibre Channel router.

4. The first switch of claim 1, further comprising device management circuitry configured to:

terminate forwarding for an Ethernet header of the packet, prior to determining the second port as an output port, by identifying a media access control (MAC) address of the second switch as a local address associated with the first switch.

5. The first switch of claim 1, further comprising:

identification circuitry configured to identify a first class of service associated with the second switch based on the second protocol; and

flow control circuitry configured to, corresponding to the first class of service, configure a second class of service based on priority-based flow control for the first switch.

6. The first switch of claim 5, wherein the packet processor is further configured to create a notification message for a remote switch in the network of interconnected switches in response to identifying the first class of service, wherein the notification message includes the second class of service configured for the first switch.

7. The first switch of claim 1, wherein the packet processor is further configured to construct a notification message for a remote switch in the network of interconnected switches, wherein the notification message includes a MAC address learned from a port in the plurality of ports.

8. The first switch of claim 1, further comprising forwarding circuitry configured to make a local routing decision for a second packet using a routing protocol instance based on the first protocol, wherein the second packet includes an inner packet destined to a remote switch outside of the network of interconnected switches.

9. The first switch of claim 8, wherein the routing protocol corresponds to one of:

Open Shortest Path First (OSPF);

Intermediate System to Intermediate System (IS-IS); and

Distance-vector.

10. The first switch of claim 1, further comprising a fabric switch management module configured to maintain a membership in the network of interconnected switches, wherein the network of interconnected switches is identified by a fabric identifier.

11. A method, comprising:

constructing, by a first switch, a notification message, wherein the first switch includes a plurality of ports comprising a first port capable of forwarding based on a first protocol in a network of interconnected switches and a second port capable of forwarding based on a second protocol;

wherein the notification message indicates a physical switch identifier of a second switch, which operates based on the second protocol, as a second switch identifier of a third switch capable of operating based on the first protocol,

wherein the physical switch identifier and the second switch identifier are of a same format; and

determining the first port as an output port for the notification message, wherein the first port corresponds to another switch; and

determining the second port as an output port for a packet with the physical switch identifier as an egress switch identifier based on the physical switch identifier, wherein the second port corresponds to the second switch.

12. The method of claim 11, wherein the method further comprises extracting the packet by decapsulating an encapsulation header associated with the first protocol, wherein the destination address of the encapsulation header corresponds to the third switch.

13. The method of claim 12, wherein the packet is a Fibre Channel packet, and wherein the second switch is a Fibre Channel router.

14. The method of claim 11, further comprising:

terminating forwarding for an Ethernet header of the packet, prior to determining the second port as an output port, by identifying a media access control (MAC) address of the second switch as a local address associated with the first switch.

15. The method of claim 11, further comprising:

identifying a first class of service associated with the second switch based on the second protocol; and

corresponding to the first class of service, configuring a second class of service based on priority-based flow control for the first switch.

16. The method of claim 15, further comprising creating a notification message for a remote switch in the network of interconnected switches in response to identifying the first class of service, wherein the notification message includes the second class of service configured for the first switch.

17. The method of claim 11, further comprising constructing a notification message for a remote switch in the network of interconnected switches, wherein the notification message includes a MAC address learned from a port in the plurality of ports of the first switch.

18. The method of claim 11, further comprising making a local routing decision for a second packet using a routing protocol instance based on the first protocol, wherein the second packet includes an inner packet destined to a remote switch outside of the network of interconnected switches.

19. The method of claim 18, wherein the routing protocol corresponds to one of:

Open Shortest Path First (OSPF);

Intermediate System to Intermediate System (IS-IS); and

Distance-vector.

20. The method of claim 11, further comprising maintaining a membership in the network of interconnected switches, wherein the network of interconnected switches is identified by a fabric identifier.