Cisco 300 Series Administration Guide

IP Configuration
IPv4 Management and Interfaces
282 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)
17
The following describes how DHCP request packets are handled when both
DHCP Snooping and DHCP Relay are enabled:
Option 82
Insertion
Disabled
Packet is sent
without Option
82
Packet is sent
with the
original
Option 82
Relay –
inserts Option
82
Bridge – no
Option 82 is
inserted
Relay –
discards the
packet
Bridge –
Packet is sent
with the
original
Option 82
Option 82
Insertion
Enabled
Relay – is sent
with Option 82
Bridge – no
Option 82 is
sent
Packet is sent
with the
original
Option 82
Relay – is sent
with Option
82
Bridge – no
Option 82 is
sent
Relay –
discards the
packet
Bridge –
Packet is sent
with the
original
Option 82
DHCP Relay
VLAN with IP Address
DHCP Relay
VLAN without IP Address
Packet arrives
without Option
82
Packet
arrives with
Option 82
Packet arrives
without
Option 82
Packet arrives
with Option
82
Option 82
Insertion
Disabled
Packet is sent
without Option
82
Packet is
sent with the
original
Option 82
Relay – inserts
Option 82
Bridge – no
Option 82 is
inserted
Relay –
discards the
packet
Bridge –
Packet is sent
with the
original
Option 82
DHCP Relay
VLAN with IP Address
DHCP Relay
VLAN without IP Address

Cisco 300 Series Specifications

General

Model	Cisco 300 Series
Category	Switch
Dimensions	Varies by model
Weight	Varies by model
Power over Ethernet (PoE)	Available on select models
Management	Web-based GUI, SNMP, CLI
VLANs	Up to 256
Security Features	ACLs, 802.1X, Port Security
Humidity	10% to 90% non-condensing
Ports	8, 16, 24, 48