Provisoning of a new node joining an existing cluster in a data center environment

• US 9,130,836 B2
• Filed: 02/04/2013
• Issued: 09/08/2015
• Est. Priority Date: 02/04/2013
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Kapadia, Shyam, Krishnan, Padmanabhan, Jain, Vipin, Vemulakonda, Srividya S.
• Primary Examiner(s): Faroul, Farah
• Application Number:
  US13/758,732
• Publication Number:
  US 20140219079A1
• Time in Patent Office: 946 Days
• Field of Search: 370/221, 370/256, 370/389
• US Class Current: 1/1
• CPC Class Codes: G06F 15/16 Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs coordinating program control therefor G06F9/52; in regulating and control system G05B
• CPC Class Codes: G06F 15/17 using an input/output type connection, e.g. channel, I/O port
• CPC Class Codes: H04L 41/0806 for initial configuration or provisioning, e.g. plug-and-play
• CPC Class Codes: H04L 41/0886 Fully automatic configuration

Abstract

A method is provided in one example embodiment and includes identifying for a new node added to a communications network a plurality of existing network nodes respectively connected to one of a plurality of ports of the new node and capable of implementing a particular routing protocol; selecting one of the identified existing network nodes to serve as a designated forwarder (“DF”) for the new node; performing a power on auto provisioning (“PoAP”) procedure in connection with the new node; and opening the ports of the new node to which the identified existing network nodes are connected.

Claims

1. A method comprising:

identifying for a new node added to a communications network a plurality of existing network nodes respectively connected to one of a plurality of ports of the new node and capable of implementing a particular routing protocol;

selecting one of the identified existing network nodes to serve as a designated forwarder (“

DF”

) for the new node;

closing all of the ports of the new node except for the port to which the DF is connected;

performing a power on auto provisioning (“

PoAP”

) procedure in connection with the new node; and

subsequent to the POAP procedure, opening the closed ports of the new node to which the identified existing network nodes are connected,

wherein the communications network is arranged in accordance with a spine-leaf topology and the new node comprises a leaf node and each of the existing network nodes comprises a spine node.

2. The method of claim 1, wherein the performing a PoAP procedure further comprises the new node communicating with a server connected to the communications network via the DF.

3. The method of claim 1 further comprising:

detecting a failure in communication between the new node and the DF;

selecting a replacement DF for the new node from the remaining ones of the identified existing network nodes; and

closing a port to which the original DF is connected and opening a port to which the replacement DF is connected.

4. The method of claim 1, wherein the particular routing protocol is Layer2 multipath (“

L2MP”

).

5. The method of claim 4, wherein the particular routing protocol is FabricPath or TRILL.

6. The method of claim 1, wherein the performing a PoAP procedure further comprises:

encapsulating a Dynamic Host Configuration Protocol (“

DHCP”

) flood frame received from the new node and broadcasting the encapsulated frame on the network in accordance with a selected distribution tree.

7. The method of claim 1, wherein the performing a PoAP procedure further comprises:

decapsulating a Dynamic Host Configuration Protocol (“

DHCP”

) response frame received from the server in accordance with a selected distribution tree and forwarding the decapsulated frame to the new node.

8. The method of claim 1, wherein the performing a PoAP procedure comprises:

determining whether a unicast frame received at a network node connected to the server results in a destination hit;

encapsulating the received unicast frame and sending it to the DF in the case of a destination hit; and

encapsulating the received unicast frame and broadcasting it in accordance with a selected distribution tree in the case of a destination miss.

9. One or more non-transitory tangible media that includes code for execution and when executed by a processor performs operations comprising:

identifying for a new node added to a communications network a plurality of existing network nodes respectively connected to one of a plurality of ports of the new node and capable of implementing a particular routing protocol;

selecting one of the identified existing network nodes to serve as a designated forwarder (“

DF”

) for the new node;

closing all of the ports of the new node except for the port to which the DF is connected;

performing a power on auto provisioning (“

PoAP”

) procedure in connection with the new node; and

subsequent to the POAP procedure, opening the closed ports of the new node to which the identified existing network nodes are connected,

wherein the communications network is arranged in accordance with a spine-leaf topology and the new node comprises a leaf node and each of the existing network nodes comprises a spine node.

10. The media of claim 9, wherein the performing a PoAP procedure further comprises the new node communicating with a server connected to the communications network via the DF.

11. The media of claim 9 further comprising:

detecting a failure in communication between the new node and the DF;

selecting a replacement DF for the new node from the remaining ones of the identified existing network nodes; and

closing a port to which the original DF is connected and opening a port to which the replacement DF is connected.

12. The media of claim 9, wherein the particular routing protocol is Layer2 multipath (“

L2MP”

).

13. The media of claim 9, wherein the performing a PoAP procedure further comprises:

encapsulating a Dynamic Host Configuration Protocol (“

DHCP”

) flood frame received from the new node and broadcasting the encapsulated frame on the network in accordance with a selected distribution tree.

14. The media of claim 9, wherein the performing a PoAP procedure further comprises:

decapsulating a Dynamic Host Configuration Protocol (“

DHCP”

) response frame received from the server in accordance with a selected distribution tree and forwarding the decapsulated frame to the new node.

15. The media of claim 9, wherein the performing a PoAP procedure comprises:

determining whether a unicast frame received at a network node connected to the server results in a destination hit;

encapsulating the received unicast frame and sending it to the DF in the case of a destination hit; and

encapsulating the received unicast frame and broadcasting it in accordance with a selected distribution tree in the case of a destination miss.

16. An apparatus comprising:

a memory element configured to store data;

a processor for executing instructions associated with the data; and

at least one power on auto provisioning (“

PoAP”

) module configured to;

identify for a new node added to a communications network a plurality of existing network nodes respectively connected to one of a plurality of ports of the new node and capable of implementing a particular routing protocol;

select one of the identified existing network nodes to serve as a designated forwarder (“

DF”

) for the new node;

close all of the ports of the new node except for the port to which the DF is connected;

perform a power on auto provisioning (“

PoAP”

) procedure in connection with the new node; and

subsequent to the POAP procedure, open the closed ports of the new node to which the identified existing network nodes are connected,

wherein the communications network is arranged in accordance with a spine-leaf topology and the new node comprises a leaf node and each of the existing network nodes comprises a spine node.

17. The apparatus of claim 16, wherein the performing a PoAP procedure further comprises the new node communicating with a server connected to the communications network via the DF.

18. The apparatus of claim 16 wherein the at least one PoAP module is further configured to:

detect a failure in communication between the new node and the DF;

select a replacement DF for the new node from the remaining ones of the identified existing network nodes; and

close a port to which the original DF is connected and opening a port to which the replacement DF is connected.

19. The apparatus of claim 16, wherein the particular routing protocol is Layer2 multipath (“

L2MP”

).

20. The apparatus of claim 16, wherein the performing a PoAP procedure further comprises at least one of:

encapsulating a Dynamic Host Configuration Protocol (“

DHCP”

) flood frame received from the new node and broadcasting the encapsulated frame on the network in accordance with a selected distribution tree; and

decapsulating a Dynamic Host Configuration Protocol (“

DHCP”

) response frame received from the server in accordance with a selected distribution tree and forwarding the decapsulated frame to the new node.