3Com Switch 7757 Информационный лист - Страница 9
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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
‡
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