Systems and methods for ensuring redundancy between relay agents

A system comprising:

• an establishment module, stored in memory, that establishes, by a first relay agent over a Transmission Control Protocol (TCP) connection, a peer relationship with a second relay agent;
• a synchronization module, stored in memory, that synchronizes, by the first relay agent, subscriber information with the second relay agent for a subscriber group;
• a calculation module, stored in memory, that periodically calculates, by the first relay agent, a checksum for all subscribers in the subscriber group, wherein the checksum is calculated during an inactive period of the TCP connection prior to a TCP keepalive message;
• an exchange module, stored in memory, that exchanges, by the first relay agent, the checksum from the first relay agent with a second checksum from the second relay agent via periodic TCP keepalive messages, wherein the second checksum is calculated during the inactive period of the TCP connection;
• a detection module, stored in memory, that detects, by the first relay agent, a mismatch between the checksums;
• a resolution module, stored in memory, that resolves an inconsistency in subscriber information in response to detecting the checksum mismatch;
• and
• at least one processor that executes the establishment module, the synchronization module, the calculation module, the exchange module, the detection module, and the resolution module.

A non-transitory computer-readable medium comprising one or more computer-executable instructions that, when executed by at least one processor of a computing device, cause the computing device to:

• establish, by a first relay agent over a Transmission Control Protocol (TCP) connection, a peer relationship with a second relay agent;
• synchronize, by the first relay agent, subscriber information with the second relay agent for a subscriber group;
• periodically calculate, by the first relay agent, a checksum for all subscribers in the subscriber group, wherein the checksum is calculated during an inactive period of the TCP connection prior to a TCP keepalive message;
• exchange, by the first relay agent, the checksum from the first relay agent with a second checksum from the second relay agent via periodic TCP keepalive messages, wherein the second checksum is calculated during the inactive period of the TCP connection;
• detect, by the first relay agent, a mismatch between the checksums;
• and
• resolve an inconsistency in subscriber information in response to detecting the checksum mismatch.