Route monitoring groups monitor the connectivity of network-side IPv4 routes, and their status is associated with IPv4 static routes. By leveraging route monitoring groups, access-side service modules can perform active/standby link switchovers upon changes to the connectivity status of network-side IP routes, preventing network congestion or traffic loss.
To improve network reliability, device-level redundancy is used on live networks. This involves two devices that back up each other and operate in load balancing mode. If one device fails, the other device takes over services from the faulty device. Inter-device link reliability and load balancing issues need to be resolved when one device is dual-homed to two devices that operate in active/standby mode.
In a two-node hot standby scenario, if some or all network-side links fail, the bandwidth of the network-side links decreases accordingly. Network congestion or traffic loss will occur if the access side cannot promptly detect link failures. To prevent these problems from arising, you can configure a route monitoring group and associate its status with the status of IPv4 static routes. This allows status changes of network-side routes to trigger switching between the active and standby links of access-side service modules.