3Com SUPERSTACK 3 3226

3
COM
®
S
UPERSTACK
®
3
SWITCH 3200 FAMILY DATA SHEET
3
Features
PERFORMANCE
Switching capacity SuperStack 3 Switch 3226, 8.8 Gbps; Switch 3250, 13.6 Gbps
F
orwarding rate Switch 3226, 6.6 Mpps; Switch 3250, 10.1 Mpps
Store-and-forward switching; latency <12 µs
LAYER 2 SWITCHING
MAC Address 8K MAC addresses
VLAN 255 VLANs (IEEE 802.1Q)
Link Aggregation IEEE 802.1ad (LACP), Gigabit ports only
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
S
upports Broadcast Storm Suppression (3,000 pps threshold)
Spanning Tree Protocol / Rapid Spanning Tree Protocol IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)
Backward-compatible with Spanning Tree Protocol (STP)
Fast-start mode
Spanning tree enable/disable per port
LAYER 3 SWITCHING
Routes Hardware based routing
2,001 IP routes: 1,990 dynamic and 10 static Address Resolution Protocol (ARP) entries with 1 user
default route
IP Routing 32 IP interfaces
Multi-netting (multiple IP interfaces per VLAN)
Routing Information Protocol (RIP), v1 and v2
• Split Horizon
• Split Horizon with poisoned reverse
• Triggered updates
• MD5 authentication of the RIP packets
• Password authenticated RIP packets
• Host route advertisements
Multicast Filtering for 64 multicast groups
Internet Group Management Protocol (IGMP) snooping on Layer 2 interfaces
IGMP v1 and v2
IGMP Querier
Network protocol Dynamic Host Configuration Protocol (DHCP) Helper/Relay
UDP Helper
ARP, ARP Proxy
CONVERGENCE
Priority Queues
Four har
dwar
e queues per port
Weighted Round Robin queuing
Traffic Prioritization Priority based on:
• Dif
fServ Code Point (DSCP)
• IEEE 802.1p Class of Service (CoS) VLAN priority
• TCP/UDP destination port number
• Default port priority
• Auto classification of 3Com NBX
®
telephony traffic
Bandwidth Management Port-based bandwidth management:
• 1 Mbps incr
ements (10/100 ports)
• 8 Mbps increments (Gigabit ports)