3com SuperStack® 3 Switch 3226 3CR17500-91-ME Manual Do Utilizador

3 C O M

®

S U P E R S TA C K

®

3   S W I T C H   3 2 0 0   FA M I LY   D ATA   S H E E T

PERFORMANCE

Switching capacity: SuperStack 3 Switch 3226, 8.8 Gbps; Switch 3250, 13.6 Gbps
Forwarding 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
Supports Broadcast Storm Suppression (3,000 pps threshold)

STP/RSTP

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

LAYER 3 SWITCHING

Routes

Hardware based routing
2,000 IP routes
1,990 dynamic and 100 static ARP (Address Resolution Protocol) entries 

IP Routing

32 IP interfaces 
Multi-netting (multiple IP interfaces per VLAN)
RIP (Routing Information Protocol), 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
IGMP (Internet Group Management Protocol) snooping on Layer 2 interfaces
IGMP v1 and v2
IGMP Querier

Network protocol

DHCP (Dynamic Host Configuration Protocol) Helper/Relay
UDP Helper
ARP, ARP Proxy

CONVERGENCE

Priority Queues

Four hardware queues per port
Weighted Round Robin queuing

Traffic Prioritization

Priority based on:

• DSCP (DiffServ Code Point)
• 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 increments (10/100 ports)
• 8 Mbps increments (Gigabit ports)