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Thông số kỹ thuật
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Switching capacity and forwarding rate
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Capacity in Millions of Packets per Second (mpps) (64-byte
packets): 77.38
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All switches are wire speed and nonblocking
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Switching Capacity in Gigabits per Second (Gbps): 104
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Total System Ports
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52 Gigabit Ethernet
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RJ-45 Ports
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48 Gigabit Ethernet
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Up link port
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2 SFP slots, 2 Gigabit Ethernet combo
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Jumbo frames
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Frame sizes up to 9K bytes. The default MTU is 2K
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MAC table
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64K addresses
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Layer 2 Switching
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Spanning Tree Protocol
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Standard 802.1d Spanning Tree support
Fast convergence using 802.1w (Rapid Spanning Tree [RSTP]), enabled by
default
8 instances are supported
Multiple Spanning Tree instances using 802.1s (MSTP)
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Port grouping
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Support for IEEE 802.3ad Link Aggregation Control Protocol
(LACP): Up to 8 groups, Up to 8 ports per group with 16 candidate ports for
each (dynamic) 802.3ad link aggregation
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VLAN
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Support for up to 4096 VLANs simultaneously
Port-based and 802.1Q tag-based VLANs
MAC-based VLAN
Management VLAN
Private VLAN Edge (PVE), also known as protected ports, with multiple uplinks
Guest VLAN
Unauthenticated VLAN
Dynamic VLAN assignment via RADIUS server along with 802.1x client
authentication
CPE VLAN
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Voice VLAN
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Voice traffic is automatically assigned to a
voice-specific VLAN and treated with appropriate levels of QoS
Auto voice capabilities deliver networkwide zero-touch deployment of voice
endpoints and call control devices
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Multicast TV VLAN
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Multicast TV VLAN allows the single multicast VLAN to be
shared in the network while subscribers remain in separate VLANs (also known
as MVR)
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Q-in-Q VLAN
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VLANs transparently cross a service provider network while
isolating traffic among customers
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Generic VLAN Registration Protocol (GVRP)/Generic
Attribute Registration Protocol (GARP)
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Protocols for automatically propagating and configuring
VLANs in a bridged domain
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Unidirectional Link Detection (UDLD)
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UDLD monitors physical connection to detect unidirectional
links caused by incorrect wiring or cable/port faults to prevent forwarding
loops and blackholing of traffic in switched networks
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Dynamic Host Configuration Protocol (DHCP) Relay at Layer
2
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Relay of DHCP traffic to DHCP server in different VLAN;
works with DHCP Option 82
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Internet Group Management Protocol (IGMP) versions 1, 2,
and 3 snooping
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IGMP limits bandwidth-intensive multicast traffic to only
the requesters; supports 1K multicast groups (source-specific multicasting is
also supported)
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IGMP Querier
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IGMP querier is used to support a Layer 2 multicast domain
of snooping switches in the absence of a multicast router
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Head-Of-Line (HOL) blocking
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HOL blocking prevention
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Loopback Detection
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Loopback detection provides protection against loops by
transmitting loop protocol packets out of ports on which loop protection has
been enabled. It operates independently of STP
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Layer 3
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IPv4 routing
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Wirespeed routing of IPv4 packets
Up to 1K static routes and up to 256 IP interfaces
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IPv6 routing
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Wirespeed routing of IPv6 packets
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Classless Interdomain Routing (CIDR)
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Support for CIDR
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Layer 3 Interface
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Configuration of Layer 3 interface on physical port, LAG,
VLAN interface, or loopback interface
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DHCP relay at Layer 3
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Relay of DHCP traffic across IP domains
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User Datagram Protocol (UDP) relay
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Relay of broadcast information across Layer 3 domains for
application discovery or relaying of bootP/DHCP packets
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DHCP Server
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Switch functions as an IPv4 DHCP server serving IP
addresses for multiple DHCP pools/scopes
Support for DHCP options
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Security
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Secure Shell (SSH) Protocol
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SSH is a secure replacement for Telnet traffic. SCP also
uses SSH. SSH v1 and v2 are supported
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Secure Sockets Layer (SSL)
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SSL support: Encrypts all HTTPS traffic, allowing highly
secure access to the browser-based management GUI in the switch
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IEEE 802.1X (Authenticator role)
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802.1X: RADIUS authentication and accounting, MD5 hash;
guest VLAN; unauthenticated VLAN, single/multiple host mode and
single/multiple sessions
Supports time-based 802.1X
Dynamic VLAN assignment
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Web-based authentication
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Web based authentication provides network admission
control through web browser to any host devices and operating systems
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STP Bridge Protocol Data Unit (BPDU) Guard
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A security mechanism to protect the network from invalid
configurations. A port enabled for BPDU Guard is shut down if a BPDU message
is received on that port
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STP Root Guard
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This prevents edge devices not in the network
administrator’s control from becoming Spanning Tree Protocol root nodes
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DHCP snooping
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Filters out DHCP messages with unregistered IP addresses
and/or from unexpected or untrusted interfaces. This prevents rogue devices
from behaving as DHCP Servers
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IP Source Guard (IPSG)
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When IP Source Guard is enabled at a port, the switch
filters out IP packets received from the port if the source IP addresses of
the packets have not been statically configured or dynamically learned from
DHCP snooping. This prevents IP Address Spoofing
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Dynamic ARP Inspection (DAI)
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The switch discards ARP packets from a port if there are
no static or dynamic IP/MAC bindings or if there is a discrepancy between the
source or destination addresses in the ARP packet. This prevents
man-in-the-middle attacks
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IP/MAC/Port Binding (IPMB)
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The preceding features (DHCP Snooping, IP Source Guard,
and Dynamic ARP Inspection) work together to prevent DOS attacks in the
network, thereby increasing network availability
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Secure Core Technology (SCT)
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Makes sure that the switch will receive and process
management and protocol traffic no matter how much traffic is received
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Secure Sensitive Data (SSD)
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A mechanism to manage sensitive data (such as passwords,
keys, and so on) securely on the switch, populating this data to other
devices, and secure autoconfig. Access to view the sensitive data as
plaintext or encrypted is provided according to the user-configured access
level and the access method of the user
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Layer 2 isolation Private VLAN Edge (PVE) with community
VLAN
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PVE (also known as protected ports) provides Layer 2
isolation between devices in the same VLAN, supports multiple uplinks
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Port security
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The ability to lock source MAC addresses to ports and
limits the number of learned MAC addresses
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RADIUS/TACACS+
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Supports RADIUS and TACACS authentication. Switch
functions as a client
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Storm control
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Broadcast, multicast, and unknown unicast
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RADIUS accounting
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The RADIUS accounting functions allow data to be sent at
the start and end of services, indicating the amount of resources (such as
time, packets, bytes, and so on) used during the session
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DoS prevention
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Denial-Of-Service (DOS) attack prevention
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ACLs
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Support for up to 512 rules
Drop or rate limit based on source and destination MAC, VLAN ID or IP
address, protocol, port, Differentiated Services Code Point (DSCP)/IP
precedence, TCP/UDP source and destination ports, 802.1p priority, Ethernet
type, Internet Control Message Protocol (ICMP) packets, IGMP packets, TCP
flag, time-based ACLs supported
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Quality of Service
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Priority levels
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8 hardware queues
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Scheduling
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Strict priority and Weighted Round-Robin (WRR)Queue
assignment based on DSCP and class of service (802.1p/CoS)
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Class of service
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Port based; 802.1p VLAN priority based; IPv4/v6 IP
precedence/Type of Service (ToS)/DSCP based; Differentiated Services
(DiffServ); classification and remarking ACLs, trusted QoS
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Rate limiting
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Ingress policer; egress shaping and rate control; per
VLAN, per port, and flow based
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Power over Ethernet (PoE)
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PoE
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The following switches support 802.3at PoE+, 802.3af PoE,
and Cisco prestandard (legacy) PoE on any of the RJ45 network ports. 60W PoE
is also supported on selected RJ-45 network ports
Maximum power of 60W is delivered to any of the 60W PoE ports, and maximum
power of 30W is delivered to any of the other RJ45 network ports, until the
PoE budget for the switch is reached
The total power available for PoE per switch is as follows
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Power Dedicated to PoE
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375 W
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Number of Ports That Support PoE
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48
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Environmental
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Dimensions
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440 x 44 x 350 mm
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Weight
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3.81 kg
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