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SPECIFICATIONS

All information in this section is

relevant to all current members of

the 3Com Switch 7750 Family, unless

stated otherwise.

CAPACITIES AND PERFORMANCE

3Com Switch 7758 8-slot:

2 switch fabric and 6 payload slots

Backplane: 96 Gbps

Max. system bandwidth: 240 Gbps

(full duplex)

Max. aggregate system throughput:

179 Mpps

3Com Switch 7757 7-slot:

1 switch fabric and 6 payload slots

Backplane: 96 Gbps

Max. system bandwidth: 240 Gbps

(full duplex)

Max. aggregate system throughput:

179 Mpps

3Com Switch 7754 4-slot:

1 switch fabric and 3 payload slots

Backplane: 48 Gbps

Max. system bandwidth: 120 Gbps

(full duplex)

Max. aggregate system throughput:

89 Mpps

All models:

Layer 3: 1,024 IP interfaces, IP routing

at 48 Mpps, 64k IP routing entries

LAYER 2 SWITCHING

16K MAC addresses

5K static MAC addresses

Modules forwarding (delay <10µs)

9K jumbo frame support

4,096 VLANs (IEEE 802.1Q)

Port-based (IEEE 802.1Q) and

protocol-based (IEEE 802.1v) VLANS

GARP VLAN Registration Protocol

(GVRP)

IP v6 tunneling using protocol-based

VLANs

IEEE 802.3ad Link Aggregation

Control Protocol (LACP)

Supports maximum of 64 link

aggregation groups

Auto-negotiation of port speed and

duplex

IEEE 802.3x full-duplex flow control

Back pressure flow control for half-

duplex

Supports broadcast storm suppression

IEEE 802.1D Spanning Tree Protocol

(STP)

IEEE 802.1w Rapid Spanning Tree

Protocol (RSTP)

IEEE 802.1s Multiple Spanning Tree

Protocol instances (MSTP)

Bridge Protocol Data Unit (BPDU)

protection

†

Available in the 3Com Advanced Feature Software, at additional cost.

‡

SNMP v3 and SSH v2 encryption features are available in the Basic Software with Encryption and Advanced Feature Software versions only.

LAYER 3 SWITCHING

Hardware based routing

64K dynamic routes

5K static routes

8K dynamic/static Address Resolution

Protocol (ARP) entries

1,024 IP interfaces

Routing Information Protocol (RIP),

v1 and v2; supports Split Horizons

Open Shortest Path First (OSPF),

v1 and v2; 50 areas

Equal Cost Multi-Path (ECMP) Routing

Border Gateway Protocol 4 (BGP4)

Intra-Domain Intermediate System to

†

Intermediate System (IS-IS)

Hardware-based multicast routing for

wirespeed performance

1K multicast routes

Multicast Source Discovery Protocol

(MSDP)

Multicast rate limiting

Internet Group Management Protocol

(IGMP) snooping on Layer 2 interfaces

IGMP v1 and v2

GARP Multicast Registration Protocol

(GMRP)

Protocol Independent Multicast-Dense

Mode (PIM-DM)

Protocol Independent Multicast-

Sparse Mode (PIM-SM)

Multicast VLAN

Dynamic Host Configuration Protocol

relay (DHCP relay)

DHCP client and server

TCP/IP protocol stack; ARP

Virtual Router Redundancy Protocol

(VRRP)

CONVERGENCE

8 hardware queues per port

Flow-based QoS profiles

Ingress and egress

Remarking of packets based on

priority:

• Auto identification and classification

of IP telephones

• Selectable prioritization

• Diffserv Code Point (DSCP)

• Type of Service (ToS)

• IEEE 802.1p Class of Service (CoS)

• IP precedence

• Local precedence: physical port,

source/destination MAC address,

VLAN information, Ethernet type,

Layer 3 protocol, source/destination

IP address, DSCP, datagram type, IP

Layer 4 protocol, IP Layer 4 ports

Flow-based bandwidth management

Flows identified through Access

Control Lists (ACLs)

Minimum and maximum thresholds:

64kbit/s increments, 100 traffic classes

per port

Queuing algorithms

Strict Priority Queuing (SPQ)

3COM

SWITCH 7750 FAMILY

Weighted Round Robin (WRR)

provided through bandwidth manage-

ment

IEEE 802.3af Power over Ethernet

standards-compliant

Available 10/100 and 10/100/1000

48-port PoE switch modules

PoE modules require external PoE

Power Rack:

• One 2,500W PSU standard with

Power Rack

• Each 2,500W PSU supports up to

155 PoE ports at full standard

†

15.4W per port

• Add one or two additional PSUs for

added PoE and N+1 PoE redundancy

SECURITY

IEEE 802.1X Network login user

authentication

Local authentication and

RADIUS/AAA authentication

RADIUS/TACACS+ session accounting

RADIUS Authenticated Device Access

(RADA): authenticate devices based

on MAC address against RADIUS

server or local database; assign VLAN

ID and ACL through RADIUS

DHCP snooping

Wirespeed packet filtering in hardware

Supports a maximum of 1,536 ACL

rules

ACLs filter at Layers 2, 3 and 4:

• Physical port

• Source/destination MAC address

• VLAN information

• Ethernet type

• Layer 3 protocol

• Source/destination IP address

• DSCP

• Datagram type

• IP Layer 4 protocol

• IP Layer 4 ports

Anti DoS (Denial of Service) attack

via BPDU route guard, DHCP server

address check and SYN packet attack

protection

Guest VLAN to quarantine

unauthorized users or users that

fail to re-authenticate via RADIUS

Multiple authentication server realm

definitions

Spanning Tree root bridge protection

SYN packet attack protection

Telnet protection

Switch protocol security: MD5 cipher-

text authentication and clear-text

authentication for OSPF v2 and RIP v2

packets and SNMP v3 traffic

IEEE 802.1X user authentication of

switch management on switch Telnet

sessions

Hierarchical management and password

protection for management interface

SNMP v3 encryption

‡

SSH v2 management session

encryption

‡