Cisco SF500-24 User Manual

IP Configuration
IPv4 Management and Interfaces
Cisco 500 Series Stackable Managed Switch Administration Guide Release 1.3 298
17
The following describes how DHCP request packets are handled when both
DHCP Snooping and DHCP Relay are enabled:
The following describes how DHCP Reply packets are handled when DHCP
Snooping is disabled:
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
Option 82
Insertion
Enabled
Relay – is sent
with Option 82
Bridge – Option
82 is added
(if port is
trusted,
behaves as if
DHCP Snooping
is not enabled)
Packet is
sent with the
original
Option 82
Relay – is sent
with Option 82
Bridge –
Option 82 is
inserted
(if port is
trusted,
behaves as if
DHCP
Snooping is
not enabled)
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

Cisco SF500-24 Specifications

General

Brand	Cisco
Model	SF500-24
Category	Switch
Language	English