US 2016/0080249 A1 · PREVENT VRRP MASTER / MASTER SPLIT IN ACTIVE / STANDBY ICR SYSTEM

Abstract

Exemplary methods for preventing a master/master split condition in a virtual router redundancy protocol (VRRP) router comprising of a first network device configured to serve as a backup router of the VRRP router, and a second network device configured to serve as a master router of the VRRP router, include in response to determining that there is a possibility that the second network device is no longer capable of forwarding network traffic as the master router of the VRRP router, transitioning into a curfew state. The methods further include in response to determining that a VRRP advertisement message was not received within a master_down_interval, determining to not transition to serving as the master router of the VRRP router in response to determining the first network device is in the curfew state.

Claims24

Dependent claims

A method in a first network device of a virtual router redundancy protocol (VRRP) router, the VRRP router comprising of the first network device configured to serve as a backup router of the VRRP router, and a second network device configured to serve as a master router of the VRRP router, the method comprising:

in response to determining that there is a possibility that the second network device is no longer capable of forwarding network traffic as the master router of the VRRP router, transitioning into a curfew state;
and
in response to determining that a VRRP advertisement message was not received within a master_down_interval, determining to not transition to serving as the master router of the VRRP router in response to determining the first network device is in the curfew state.

A first network device of a virtual router redundancy protocol (VRRP) router, the VRRP router comprising of the first network device configured to serve as a backup router of the VRRP router, and a second network device configured to serve as a master router of the VRRP router, the first network device comprising:

a set of one or more processors;
and
a non-transitory machine-readable storage medium containing code, which when executed by the set of one or more processors, cause the first network device to:
in response to determining that there is a possibility that the second network device is no longer capable of forwarding network traffic as the master router of the VRRP router, transition into a curfew state;
and
in response to determining that a VRRP advertisement message was not received within a master_down_interval, determine to not transition to serving as the master router of the VRRP router in response to determining the first network device is in the curfew state.

3 more elements

Dependencies are inferred from the claim text.

Prevent vrrp master / master split in active / standby icr system

Life of this patent

Prevent vrrp master / master split in active / standby icr system

Life of this patent

Abstract

Claims24