HP V1910 Switch Series User Manual

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 Target protocol address: This field specifies the protocol address of the device the message is being
sent to.
ARP operation
Suppose that Host A and Host B are on the same subnet and Host A sends a packet to Host B, as shown
in Figure 266. The resolution process is as follows:
 Host A looks into its ARP table to see whether there is an ARP entry for Host B. If yes, Host A uses
the MAC address in the entry to encapsulate the IP packet into a data link layer frame and sends
the frame to Host B.
 If Host A finds no entry for Host B, Host A buffers the packet and broadcasts an ARP request, in
which the sender IP address and the sender MAC address are the IP address and the MAC address
of Host A respectively, and the target IP address and the target MAC address are the IP address of
Host B and an all-zero MAC address respectively. Because the ARP request is a broadcast, all hosts
on this subnet can receive the request, but only the requested host (Host B) will respond to the
request.
 Host B compares its own IP address with the destination IP address in the ARP request. If they are the
same, Host B saves the source IP address and source MAC address in its ARP table, encapsulates
its MAC address into an ARP reply, and unicasts the reply to Host A.
 After receiving the ARP reply, Host A adds the MAC address of Host B to its ARP table. Meanwhile,
Host A encapsulates the IP packet and sends it out.
Figure 266 ARP address resolution process
If Host A is not on the same subnet with Host B, Host A first sends an ARP request to the gateway. The
target IP address in the ARP request is the IP address of the gateway. After obtaining the MAC address
of the gateway from an ARP reply, Host A sends the packet to the gateway. If the gateway maintains the
ARP entry of Host B, it forwards the packet to Host B directly; if not, it broadcasts an ARP request, in which
the target IP address is the IP address of Host B. After obtaining the MAC address of Host B, the gateway
sends the packet to Host B.
ARP table
After obtaining the MAC address for the destination host, the device puts the IP-to-MAC mapping into its
own ARP table. This mapping is used for forwarding packets with the same destination in future.
An ARP table contains ARP entries, which fall into one of two categories: dynamic or static.

HP V1910 Switch Series Specifications

General

Product Series	V1910
VLAN Support	Yes
QoS	Yes
Ports	8, 24, or 48 10/100/1000 ports
MAC Address Table Size	8K entries
Power Supply	Internal power supply
Jumbo Frame Support	Yes
Operating Humidity	10% to 90% (non-condensing)

Summary

Configuration through the web interface

Default login information

Provides the default username and password for accessing the web interface.

Configuration at the CLI

Getting started with the CLI

Introduces using the Command Line Interface for device management.

Device maintenance

Software upgrade

Describes the process of upgrading the system software.

Port management configuration

Configuring a port

Guides through setting port operation parameters.

User management

Configuring users

Describes adding and managing local user accounts and groups.

SNMP configuration

Enabling SNMP

Guides on enabling and configuring SNMP settings.

VLAN configuration

Creating VLANs

Details the process of creating new VLANs.

MAC address configuration

MSTP configuration

Link aggregation and LACP configuration

Configuring link aggregation and LACP

Guides on setting up link aggregation and LACP.

DHCP overview

DHCP snooping configuration

Functions of DHCP snooping

Lists recording IP-to-MAC and ensuring authorized servers.

Diagnostic tools

Ping

Explains the ping command for verifying reachability.

Trace route

Describes the trace route command for tracing IP packets.

ARP management

ARP attack defense configuration

ARP detection

Introduces ARP detection to prevent man-in-the-middle attacks.

802.1X configuration

Configuring 802.1X globally

Guides on enabling and configuring 802.1X authentication globally.

AAA configuration

Introduction to AAA

Introduces Authentication, Authorization, and Accounting.

RADIUS configuration

Introduction to RADIUS

Users

Configuring a local user

PKI configuration

ACL configuration

ACL overview

Creating an IPv4 ACL

QoS configuration

Introduction to QoS

PoE configuration

Configuring PoE ports