Справочник Пользователя для 3com SS3 Switch 3870 48xG+F+Enet + 1 Slot 3CR17451-91-UK

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

MAC Address

16K MAC addresses
1024 secure MAC addresses

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)

Spanning Tree

IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)
Backward-compatible with STP
Fast-start mode
Spanning tree enable/disable per port

Multicast Snooping

Filtering for 64 multicast groups
IGMP v1 and v2
IGMP Querier

Jumbo Frames

Supports 9K packets

Switched 40Gbps on each switch
Up to 8 units high
Resilient loop back
Hot-swap units
Single IP address for stack management

Priority Queues

Eight hardware queues per port
Strict priority
Weighted Round Robin queuing

Traffic Prioritization

Priority based on:

• DSCP (DiffServ Code Point)
• IEEE 802.1p Class of Service (CoS) priority
• 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)

Features

3COM

®

SUPERSTACK

® 

3 SWITCH 3870 24- AND 48-PORT STACKABLE SWITCHES DATA SHEET