J9980A - HP 1820-24G Switch
24 RJ-45 autosensing 10/100/1000 ports Share 2 SFP Slot.
Tính năng chính.
• Tùy chỉnh hoạt động bằng cách sử dụng giao diện trực quan Web.
• Các tùy chọn triển khai linh hoạt bao gồm gắn tường, dưới bàn và gắn máy tính để bàn
• Các mô hình 24 và 48 cổng bao gồm các cổng SFP.
• Mô hình không PoE+ 8, 24 và 48-port không sử dụng quạt cho vận hành yên tĩnh.
• Bảo hành trọn đời.
Thông số kỹ thuật
|
|
J9979A
|
J9980A
|
J9981A
|
|
I/O ports and slots
|
8 10/100/1000 ports
|
24 10/100/1000 / 2 SFP ports
|
48 10/100/1000 / 4 SFP ports
|
|
Memory and processor
|
ARM Cortex-A9 @ 400 MHz
128 MB SDRAM
Packet buffer size
16 MB flash
|
ARM Cortex-A9 @ 400 MHz
128 MB SDRAM
Packet buffer size: 1.5 MB
16 MB flash
|
ARM Cortex-A9 @ 400 MHz
128 MB SDRAM
Packet buffer size: 1.5 MB
16 MB flash
|
|
Throughput
|
up to 11.9 Mpps
|
up to 38.6 Mpps
|
up to 77.3 Mpps
|
|
Switching capacity
|
16 Gbps
|
52 Gbps
|
104 Gbps
|
|
MAC address table size
|
8000 entries
|
8000 entries
|
16000 entries
|
|
PoE
|
No
|
No
|
No
|
|
Dimensions
(W x D x H)
|
(25.4 x 15.95 x 4.39 cm)
|
(44.25 x 24.61 x 4.39 cm)
|
(44.25 x 24.61 x 4.39 cm)
|
|
Weigh
|
1.81 lb (0.82 kg)
|
6 lb (2.72 kg)
|
7.3 lb (3.31 kg)
|
Management
• Simple Web management
Allows for easy management of the switch-even by nontechnical users-through an intuitive Web GUI; supports HTTP and HTTP Secure (HTTPS).
• SNMPv1, v2c
Enables devices to be discovered and monitored from an SNMP management station.
• Port mirroring
Enables traffic on a port to be simultaneously sent to a network analyzer for monitoring.
• Dual flash images
Provides independent primary and secondary operating system files for backup while upgrading.
• Network Time Protocol (NTP)
Synchronizes timekeeping among distributed time servers and clients; keeps timekeeping consistent among all clock-dependent devices within the network.
• Manual network time configuration
Manually set the date and time on the switch in the absence of an NTP server.
• Default DHCP client mode
Allows the switch to be directly connected to a network, enabling plug-and-play operation; in absence of a DHCP server on the network, the switch falls back to a default, fixed IP address.
Quality of Service (QoS)
• Traffic prioritization
Provides time-sensitive packets (like VoIP and video) with priority over other traffic based on DSCP or IEEE 802.1p classification; packets are mapped to eight hardware queues for more effective throughput.
• Broadcast control
Overview
Allows limiting of broadcast traffic rate to reduce unwanted network broadcast traffic. • IEEE 802.1p/Q
Delivers data to devices based on the priority and type of traffic; supports IEEE 802.1Q.
Connectivity
• Auto-MDI/MDIX
Automatically adjusts for straight-through or crossover cables on all ports.
• IEEE 802.3X flow control
Provides a flow throttling mechanism propagated through the network to prevent packet loss at a congested node.
• Loop protection
If the switch detects a loop, it disables the source port from forwarding data packets originating from the switch to avoid broadcast storms.
• SFP ports for fiber connectivity
Provides fiber connections for uplinks and other connections across longer distances than copper cabling can support; SFP ports are in addition to available copper Ethernet ports, providing a higher total number of available ports. SFP ports available on 24- and 48 port models.
• IEEE 802.3af PoE-powered device option
Obtains power provided by a standard PoE device connected to Port 1; deploy the switch wherever an Ethernet cable can reach as a power outlet is not needed (8-port GbE non-PoE+ model only).
• IEEE 802.3at Power over Ethernet (PoE+)
Provides up to 30W per port, which allows support of the latest PoE+-capable devices such as IP phones, wireless access points, and security cameras, as well as any IEEE 802.3af-compliant end device; lowers the cost of additional electrical cabling and circuits that would otherwise be necessary in IP phone and WLAN deployments.
• PoE+ port availability
Ports 1-4 provide PoE+ on the HPE 1820-8G-PoE+ (65W) switch. Ports 1 - 12 provide PoE+ on the HPE 1820-24G-PoE+ (180W) switch. Ports 1-24 provide PoE+ on the HPE 1820-48G-PoE+ (370W) switch.
• Auto PoE power configuration
The switch automatically assigns the required power to a port for a PD device based on LLDP (Link Layer Discovery Protocol). Optionally, the switch permits manual, per port, PoE power configuration.
• PoE shut down mode
A PoE scheduler provides the ability to define the hours of PoE power being supplied on a group of switch ports based on a 24 hour day. The scheduler enables the flexibility to select individual days of a week as well as reoccurrence on a weekly basis with a start and end date.
• Energy Efficient Ethernet
Compliant with IEEE 802.3az standard requirements to save energy during periods of low data activity.
• Auto port shut-down
The switch saves power by automatically shutting down power to inactive ports. Power is restored on a port upon link detection.
• Energy savings status
The switch provides an estimated cumulative energy savings due to green Ethernet features enabled.
Security
• Secure Sockets Layer (SSL)
Encrypts all HTTP traffic, allowing secure access to the browser-based management GUI in the switch.
• Automatic denial-of-service protection
Monitors nine types of malicious attacks and protects the network by blocking these attacks.
Overview
• Management password
Provides security so that only authorized access to the Web browser interface is allowed.
Performance
• Half-/full-duplex auto-negotiating capability on every port Doubles the throughput of every port.
• IGMP snooping
Improves network performance through multicast filtering, instead of flooding traffic to all ports.
Layer 2 switching
• VLAN support and tagging
Supports up to 64 port-based VLANs and dynamic configuration of IEEE 802.1Q VLAN tagging, providing security between workgroups.
• Jumbo packet support
Improves the performance of large data transfers; supports frame size of up to 9220 bytes.
Resiliency and high availability
• IEEE 802.1D Spanning Tree Protocol (STP) and IEEE 802.1W Rapid Spanning Tree Protocol (RSTP) Provides redundant links while preventing network loops.
• Link aggregation
Brings together groups of ports automatically using Link Aggregation Control Protocol (LACP) or, manually, to form an ultra-high-bandwidth connection to the network backbone; helps prevent traffic bottlenecks; the 8 port models support 4 trunks, the 24-port models support 8 trunks and the 48-port models support 16 trunks. The 8- and 24-port switches can support up to 4 ports per trunk, the 48-port switches can support up to 8 ports per trunk
Ease of use
• Locator LED
Allows users to set the locator LED on a specific switch to either turn on, blink, or turn off; simplifies troubleshooting by making it easy to locate a particular switch within a rack of similar switches.
• Comprehensive LED display with per-port indicators
Provides an at-a-glance view of status, activity, speed, and full-duplex operation.
Flexibility
• Flexible installation
Allows mounting on wall, desktop, or under-table with supplied hardware.
• Rack mountable
All models include rack-mounting hardware for mounting in a standard 19 inch telco rack.
• Kensington lock slot
Allows switches to be physically secured in open-space deployments (8-,and 24 port models).
Warranty and support
• Limited Lifetime Warranty
This series comes with a Limited Lifetime Warranty providing advance hardware replacement with next business day shipment in most countries, 24x7 phone support available for the first 90 days, and electronic and business hours phone support for the entire warranty period. See http://www.hpe.com/networking/warrantysummary for full warranty and support information included with your product purchase.
