3com SS3 Switch 3870 24x 10/100/1000 port + Enet 4x RJ-45 3CR17450-91-MEX4 User Manual

3 C O M

®

S U P E R S TA C K

®

3   S W I T C H   3 8 7 0   2 4 -   A N D   4 8 - P O R T   S TA C K A B L E   S W I T C H E S   D ATA   S H E E T

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), Gigabit ports only

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)

STP/RSTP

IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)

Backward-compatible with Spanning Tree Protocol (STP)

Fast-start mode

Spanning tree enable/disable per port

Multicast Snooping

Filtering for 64 multicast groups

IGMP (Internet Group Management Protocol) v1 and v2

IGMP Querier 

STACKING

Switched 40Gbps on each switch

Up to eight units high

Resilient loop back

Hot-swap units

Single IP address for stack management 

CONVERGENCE

Priority Queues

Eight hardware queues per port

Strict priority

Weighted Round Robin queuing

Traffic Prioritization

Remarking of packets based on priority:

• DSCP (Diffserv Code Point)

• 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)

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

Switch Management

RADIUS management of switch passwords

Trusted IP Management Addresses

Telnet: SSH v2 (56bit DES)

SSL (HTTPS): 40 Bit, 56 Bit DES