Tag :: Maintenance Mode

Maintenance mode is a framework that allows for the easy removal of switch elements or the entire switch from service with minimal configuration. This feature supports the maintenance mode in WAN Routing System Adaptive Virtual Topology, including high availability deployment. Traffic is drawn away from the node entering maintenance mode. Currently, the feature supports only maintenance mode for the built-in unit System.

Custom maintenance units with per-interface-type profiles (e.g., different shutdown behavior for L2 vs L3 ports) previously required manual tracking and updating of BGP VRF groups whenever VRFs were added or deleted. The System unit auto-includes all AllBgpNeighborVrf-* groups dynamically. However, it cannot be used when granular interface profiles are required, as a single profile is applied to all ports.

A new CLI command group auto bgp builtin enables a custom unit to behave like the System unit for BGP VRF group auto-inclusion: all builtin BGP VRF groups (AllBgpNeighborVrf-<vrf>) are automatically added to the unit and kept in sync as VRFs are created or deleted.

The objective of Maintenance Mode on MLAG is to gracefully drain away the traffic (L2 and BGP) flowing through a switch

The purpose of this feature is to mitigate multicast traffic loss when a switch that is using PIM sparse mode as its multicast routing protocol is going under maintenance.