Granted Patent B2

US 9,344,527 · App. 13/866,007 · Granted May 17, 2016

Abstract

Claims (72)

1. A method comprising:

receiving, at a processor, an indication to initiate a migrate start;

initiating a migrate start including forwarding traffic in a first protocol based on a first table and building a second table to forward traffic in a second protocol different from the first protocol;

performing a migrate cutover when it is determined that one or more MAC addresses for an active session have been learned and stored in the second table; and

completing a migration when an indication is received to complete the migration.

2. The method of claim 1 , further comprising aborting the migration based on a received indication to abort the migration.

3. The method of claim 1 , wherein the migrate start includes:

assigning a VLAN to an ISID;

continuing to use VLAN encapsulation;

advertising a local machine to remote backbone edge bridges using the second protocol; and

storing information about the advertised local machine in a second table of each remote backbone edge bridge.

4. The method of claim 1 , wherein the migrate cutover includes:

confirming that the second table includes machine addresses associated with an active session;

encapsulating and forwarding messages according to the second protocol; and

retaining NNI ports as part of a C-VLAN.

5. The method of claim 2 , wherein the aborting includes:

removing a VLAN to ISID mapping;

retaining NNI ports as part of a C-VLAN;

clearing the second table in each BEB; and

encapsulating and forwarding messages in the first protocol.

6. The method of claim 1 , wherein the completing includes:

removing NNI ports from a C-VLAN;

removing VLAN MAC entries by permitting the VLAN MAC entries to age-out; and

encapsulating and forwarding traffic using the second protocol.

7. A system comprising one or more processors configured to perform operations including:

receiving, at a processor, an indication to initiate a migrate start;

initiating a migrate start including forwarding traffic in a first protocol based on a first table and building a second table to forward traffic in a second protocol different from the first protocol;

performing a migrate cutover when it is determined that one or more MAC addresses for an active session have been learned and stored in the second table; and

completing a migration when an indication is received to complete the migration.

8. The system of claim 7 , wherein the operations further comprise aborting the migration based on a received indication to abort the migration.

9. The system of claim 7 , wherein the migrate start includes:

assigning a VLAN to an ISID;

continuing to use VLAN encapsulation;

advertising a local machine to remote backbone edge bridges using the second protocol; and

storing information about the advertised local machine in a second table of each remote backbone edge bridge.

10. The system of claim 7 , wherein the migrate cutover includes:

confirming that the second table includes machine addresses associated with an active session;

encapsulating and forwarding messages according to the second protocol; and

retaining NNI ports as part of a C-VLAN.

11. The system of claim 8 , wherein the aborting includes:

removing a VLAN to ISID mapping;

retaining NNI ports as part of a C-VLAN;

clearing the second table in each BEB; and

encapsulating and forwarding messages in the first protocol.

12. The system of claim 7 , wherein the completing includes:

removing NNI ports from a C-VLAN;

removing VLAN MAC entries by permitting the VLAN MAC entries to age-out; and

encapsulating and forwarding traffic using the second protocol.

13. A nontransitory computer readable medium having stored thereon software instructions that, when executed by a processor, cause the processor to perform operations including:

receiving, at a processor, an indication to initiate a migrate start;

initiating a migrate start including forwarding traffic in a first protocol based on a first table and building a second table to forward traffic in a second protocol different from the first protocol;

performing a migrate cutover when it is determined that one or more MAC addresses for an active session have been learned and stored in the second table; and

completing a migration when an indication is received to complete the migration.

14. The nontransitory computer readable medium of claim 13 , further comprising aborting the migration based on a received indication to abort the migration.

15. The nontransitory computer readable medium of claim 13 , wherein the migrate start includes:

assigning a VLAN to an ISID;

continuing to use VLAN encapsulation;

advertising a local machine to remote backbone edge bridges using the second protocol; and

storing information about the advertised local machine in each remote backbone edge bridge.

16. The nontransitory computer readable medium of claim 13 , wherein the migrate cutover includes:

confirming that the second table includes machine addresses associated with an active session;

encapsulating and forwarding messages according to the second protocol; and

retaining NNI ports as part of a C-VLAN.

17. The nontransitory computer readable medium of claim 14 , wherein the aborting includes:

removing a VLAN to ISID mapping;

retaining NNI ports as part of a C-VLAN;

clearing the second table in each BEB; and

encapsulating and forwarding messages in the first protocol.

18. The nontransitory computer readable medium of claim 13 , wherein the completing includes:

removing NNI ports from a C-VLAN;

removing VLAN MAC entries by permitting the VLAN MAC entries to age-out; and

encapsulating and forwarding traffic using the second protocol.

Assignments (9)