3Com 3CR17450-91 Datasheet - page 4
3 C O M
®
S W I T C H 3 8 7 0 1 0 / 1 0 0 / 1 0 0 0 FA M I LY D ATA S H E E T
4
Features
PERFORMANCE
Switching capacity
SuperStack 3 Switch 3870 24-port, 108 Gbps; Switch 3870 48-port, 156 Gbps
Forwarding rate
24-port, 80 Mpps; 48-port, 115 Mpps
Store-and-forward switching
LAYER 2 SWITCHING
MAC Address
16K MAC addresses
1K Secure MAC addresses
9K Jumbo Frame support
VLAN
255 VLANs (IEEE 802.1Q)
Link Aggregation
IEEE 802.3ad (LACP)
32 trunk groups (up to 8 ports in each), trunking across stacked units
Auto-negotiation
Auto-negotiation of port speed, duplex, and connection (MDI/MDIX)
Traffic control
IEEE 802.3x full-duplex flow control
Back pressure flow control for half-duplex
Broadcast Storm Control (500-200,000 pps limit)
Spanning Tree Protocol / Rapid Spanning Tree Protocol
IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)
Backward-compatible with Spanning Tree Protocol (STP)
IEEE 802.1s Multiple Spanning Tree Protocol (MSTP)
Fast-start mode
Spanning tree enable/disable per port
Multicast Snooping
Filtering for 64 multicast groups
Internet Group Management Protocol (IGMP) v1 and v2
IGMP Querier
LAYER 3 SWITCHING
Routes
Hardware-based routing
Static routes: 10
Dynamic / static ARP (Address Resolution Protocol) entries : 2,000 / 16
IP routing IP interfaces: 32
RIP (Routing Information Protocol), v1 and v2: 2K via default route plus 16 hardware based routes
Multicast Routing IGMP v1 and v2 snooping
STACKING
Switched 40Gbps on each switch
Up to eight units high, with single IP address for stack management
Resilient loop back
Hot-swap units
CONVERGENCE
Priority Queues
Eight hardware queues per port
Strict priority
Weighted Round Robin queuing
Traffic Prioritization
Remarking of packets based on priority:
• Diffserv Code Point (DSCP)
• IEEE 802.1p Class of Service (CoS)
• TCP/UDP destination port number
• Default port priority
• Auto classification of 3Com NBX
®
telephony traffic
Bandwidth Management
Port-based bandwidth management:
• 1 Mbps increments (Gigabit ports)
SECURITY
Network Login
IEEE 802.1X user authentication:
• RADIUS authentication
• Secure Mode (locks MAC address)
RADIUS Authenticated Device Access (RADA):
• Authenticate devices based on MAC address against RADIUS server
• Authenticate multiple devices per port
• Automatic assignment of VLANs and QoS to a port specific to the devices attached
Packet Filtering
Port-based Access Control Lists (ACLs):
• Filtered on destination IP address / mask
Switch Protocol Security
MD5 cipher-text authentication and clear-text authentication