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The AVG, or Active Virtual Gateway, in a Gateway Load Balancing Protocol (GLBP) environment advertises its timers to other routers during its regular operation. This regular operation includes the consistent broadcasting of its virtual router advertisement and the associated timers. These timers are essential for maintaining the GLBP operation as they inform other routers about the timing of hello messages and inactivity periods.

By advertising these timers regularly, the AVG ensures that all participating routers have aligned timing, which is critical for the network's failover process and overall stability. This also aids in keeping the load balancing function efficient, as it helps synchronize how different routers handle traffic and respond to network changes.

The other situations, such as when a new router joins the network, detection of a failure, or when configuration changes are made, do trigger certain functionalities and responses in GLBP but do not pertain to the AVG's regular timer advertisements. Instead, those situations involve initial discovery processes, failover negotiations, or administrative updates, respectively, rather than the ongoing advertisement of operational timers.