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IBM Ethernet g-series Switch

Secure, stackable, high-capacity Ethernet edge switches with Power over Ethernet (PoE) capability

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Feature	Benefits
Flexible and High-Capacity Architecture	48-port 10/100/1000 Mbps (RJ-45) PoE upgradeable models 4x 100/1000 Mbps SFP combination ports ideal for extended distances (shared with RJ45 ports) Single Interface module expansion slot for optional 2-port 10 GbE module on B48G 2-port 10 GbE (CX4) on B50G for stacking, enabling “pay-as-you-grow” implementations Up to two redundant, removable, and load-sharing AC power supplies
Robust Power over Ethernet	Standards-based IEEE 802.3af PoE support providing up to 15.4 watts per port Up to 48 ports of 10/100/1000 Mbps Class 3 PoE per switch (with dual power supplies) Redundant 1+1 power configurations for 48 ports of Class 2 PoE and 31 ports of Class 3 PoE PoE auto-detection enables support for PoE and non-PoE devices without configuration changes Per-port LED indicators to easily identify power-consuming devices Per-port short circuit protection to supply system protection Interoperability with popular VoIP equipment, including legacy IP phones Advanced QoS capabilities ensure high-quality VoIP support LLDP-MED and voice VLAN
Advanced Security	System-wide, automated closed loop threat detection and mitigation solution Secure Shell and SNMPv3 restrict and encrypt communications to the management interface and system Terminal Access Controller Access Control Systems (TACACS/TACACS+) and RADIUS operator authentication Secure Shell (SSHv2), SCP, and SNMPv3 secure remote management access and communications MAC filters, Layer 3/Layer 4 ACLs and binding the ACL to TELNET, Web management and SNMP interface for secure management access IEEE 802.1x authentication including multiple device authentication and dynamic VLAN, ACL, and MAC filter assignment for authenticated clients Private VLANs provide security and isolation between switch ports to help ensure that users cannot snoop on other users’ traffic Denial of Service Protection—Monitoring, throttling, and locking out of ICMP and TCP SYN traffic both to the management address of the switch and for transit traffic Port Security and MAC Address Locking limits the number MAC addresses learnt on a port. Using Port Security network managers can allow specific MAC addresses access to the network for specific time periods. MAC address authentication including multiple device authentication and dynamic policy configuration Policy-controlled MAC-based VLANs provide additional control of network access, allowing for policy-controlled assignments of devices to Layer 2 VLANs.
Advanced Quality of Service	Packet classification, reclassification, policing, marking, and re-marking Identification, classification, and reclassification of traffic based on specific criteria such as port, source/destination MAC address, 802.1p priority bit, source/destination IP address, Type of Service (ToS), Differentiated Services Codepoints (DSCP), or TCP/UDP port Flexible queue servicing utilizing configurable Weighted Round Robin (WRR), Strict Priority (SP), or hybrid SP/WRR Eight hardware queues for flexible QoS management Ingress rate limiting—standard and extended ACL control ACLs configured on a per-port per VLAN basis Egress rate limiting—per port, per queue Support for up to 256 wire-speed ingress traffic policers with each policer supporting configurable metering with maximum and burst size settings, color aware and out-of-profile packet remarking or dropping sFlow® and port mirroring on the same port
System and Network Resilience	Internal, redundant, hot-swappable, load-sharing power supplies for increased PoE reliability Advanced Layer 2 service protection features: Metro Ring Protocol, Virtual Switch Redundancy Protocol, Rapid Spanning Tree, Multiple, Spanning Tree, Per VLAN Spanning Tree (PVST, PVST+) compatibility, Protected Link groups, Link Fault Signaling (LFS), Remote Fault Notification (RFN) Port range with port speed downshift and selective auto negotiation Port loop detection to detect Layer 1/Layer 2 loops Image checksum verification Next boot information Port flap dampening Single link LACP as a standards-based bi-directional link detection protocol

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