Using segmentation identification to identify destination node within network environment

• US 9,942,142 B2
• Filed: 12/22/2015
• Issued: 04/10/2018
• Est. Priority Date: 09/07/2013
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: de Silva, Suran Saminda, Tsai, Chiajen, Dong, Liqin, Yang, Yibin
• Primary Examiner(s): NGUYEN, MINH TRANG T
• Application Number:
  US14/977,681
• Publication Number:
  US 20160112314A1
• Time in Patent Office: 840 Days
• Field of Search: None
• CPC Class Codes: H04L 12/4641 Virtual LANs, VLANs, e.g. virtual private networks [VPN] LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272
• CPC Class Codes: H04L 45/54 Organization of routing tables
• CPC Class Codes: H04L 45/586 of virtual routers
• CPC Class Codes: H04L 45/74 Address processing for routing

Abstract

Packet transmission techniques are disclosed herein. An exemplary method includes receiving a packet that identifies an internet protocol (IP) address assigned to more than one destination node; selecting a virtual routing and forwarding table based, at least in part, on a segmentation identification in the packet; identifying a designated destination node in the packet based, at least in part, on the selected virtual routing and forwarding table; and transmitting the packet to the designated destination node.

Claims

1. An apparatus comprising:

a memory configured to store data;

a processor operable to execute instructions associated with the data, wherein the processor and memory cooperate such that the apparatus is configured to;

receive a packet that identifies an internet protocol (IP) address assigned to more than one destination node;

select a virtual routing and forwarding table based, at least in part, on a segmentation identification in the packet;

identify a designated destination node in the packet based, at least in part, on the selected virtual routing and forwarding table; and

transmit the packet to the designated destination node.

2. The apparatus of claim 1, wherein the apparatus has a port number associated with the designated destination node, the apparatus further configured to identify the designated destination node in the selected virtual routing and forwarding table based, at least in part, on a correlation between the IP address and the port number.

3. The apparatus of claim 1, wherein the segmentation identification is associated with a virtual local area network (VLAN), and a virtual port associated with the VLAN is associated with the segmentation identification.

4. The apparatus of claim 1, wherein the apparatus is a switch.

5. The apparatus of claim 1 further configured to assign a core VLAN switch virtual interface (SVI) a same IP address as a border gateway protocol (BGP) control SVI.

6. The apparatus of claim 1 further configured to assign a customer VLAN for a first tenant a same IP address as a customer VLAN for a second tenant.

7. The apparatus of claim 1, wherein the segmentation identification differentiates a tenant from other tenants in a network environment.

8. The apparatus of claim 1 further configured to identify the designated destination node as a destination node corresponding with the IP address in the selected virtual routing and forwarding table.

9. The apparatus of claim 1, wherein the memory includes a segmentation identification correlation table, the apparatus further configured to select the virtual forwarding and routing table corresponding with the segmentation identification in the segmentation identification correlation table.

10. A method, comprising:

receiving a packet that identifies an internet protocol (IP) address assigned to more than one destination node;

selecting a virtual routing and forwarding table based, at least in part, on a segmentation identification in the packet;

identifying a designated destination node in the packet based, at least in part, on the selected virtual routing and forwarding table; and

transmitting the packet to the designated destination node.

11. The method of claim 10, wherein the segmentation identification is associated with a virtual local area network (VLAN), and a virtual port associated with the VLAN is associated with the segmentation identification.

12. The method of claim 10, further comprising assigning a core VLAN switch virtual interface (SVI) a same IP address as a border gateway protocol (BGP) control SVI.

13. The method of claim 10, further comprising assigning a customer VLAN for a first tenant a same IP address as a customer VLAN for a second tenant.

14. The method of claim 10, wherein the segmentation identification differentiates a tenant from other tenants in a network environment.

15. The method of claim 10, further comprising identifying the designated destination node as a destination node corresponding with the IP address in the selected virtual routing and forwarding table.

16. The method of claim 10, further comprising selecting the virtual forwarding and routing table corresponding with the segmentation identification in the segmentation identification correlation table.

17. A non-transitory media encoded with logic that includes instructions for execution, and when executed by a processor is configured to perform operations, comprising:

receiving a packet that identifies an internet protocol (IP) address assigned to more than one destination node;

selecting a virtual routing and forwarding table based, at least in part, on a segmentation identification in the packet;

identifying a designated destination node in the packet based, at least in part, on the selected virtual routing and forwarding table; and

transmitting the packet to the designated destination node.

18. The non-transitory media of claim 17, the operations further comprising assigning a core VLAN switch virtual interface (SVI) a same IP address as a border gateway protocol (BGP) control SVI.

19. The non-transitory media of claim 17, the operations further comprising assigning a customer VLAN for a first tenant a same IP address as a customer VLAN for a second tenant.

20. The non-transitory media of claim 17, wherein the segmentation identification differentiates a tenant from other tenants in a network environment.