Version 33.5.1 extends protocol and Base license feature support on 4120 and 4220 Series switches to align with Switch Engine capabilities. The following features are additionally supported:
EAPS (Ethernet Automatic Protection Switching) – Enables rapid failover in ring topologies.
ERPS (Ethernet Ring Protection Switching) – Offers sub-50ms protection switching in Ethernet ring networks.
MLAG (Multi-Switch Link Aggregation) – Supports active-active link aggregation across switches for redundancy and load balancing.
OSPF (Open Shortest Path First) – Adds support for dynamic link-state routing within an autonomous system.
PIM-SM-Edge (Protocol Independent Multicast – Sparse Mode, Edge Role) – Supports multicast routing at the network edge.
RIP (Routing Information Protocol) – Enables distance-vector routing for IPv4 networks.
Route Maps – Provides granular control over route redistribution and policy-based routing.
Routing Access Policies – Allows filtering and control of routing updates based on defined policies.
STP (Spanning Tree Protocol) – Full Support – Includes standard STP, RSTP, and MSTP variants for loop prevention and topology stability.
UPM (Universal Port Manager) – Allows port-level automation and scripting for operational flexibility.
VMANs (Virtual MANs) – Enables service provider-style VLAN tunneling using Q-in-Q encapsulation.
