C
HAPTER
24
| General Security Measures
DHCPv6 Snooping
– 917 –
ipv6 dhcp snooping
This command enables DHCPv6 snooping globally. Use the
no
form to
restore the default setting.
S
YNTAX
[
no
]
ipv6 dhcp snooping
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Global Configuration
C
OMMAND
U
SAGE
◆
Network traffic may be disrupted when malicious DHCPv6 messages are
received from an outside source. DHCPv6 snooping is used to filter
DHCPv6 messages received on an unsecure interface from outside the
network or fire wall. When DHCPv6 snooping is enabled globally by this
command, and enabled on a VLAN interface by the
ipv6 dhcp snooping
vlan
command, DHCP messages received on an untrusted interface (as
specified by the
no
ipv6 dhcp snooping trust
command) from a device
not listed in the DHCPv6 snooping table will be dropped.
◆
When enabled, DHCPv6 messages entering an untrusted interface are
filtered based upon dynamic entries learned via DHCPv6 snooping.
◆
Table entries are only learned for trusted interfaces. Each entry
includes a MAC address, IPv6 address, lease time, binding type, VLAN
identifier, and port identifier.
◆
When DHCPv6 snooping is enabled, the rate limit for the number of
DHCPv6 messages that can be processed by the switch is 100 packets
per second. Any DHCPv6 packets in excess of this limit are dropped.
◆
Filtering rules are implemented as follows:
■
If global DHCPv6 snooping is disabled, all DHCPv6 packets are
forwarded.
■
If DHCPv6 snooping is enabled globally, and also enabled on the
VLAN where the DHCPv6 packet is received, DHCPv6 packets are
forwarded for a
trusted
port as described below.
■
If DHCPv6 snooping is enabled globally, and also enabled on the
VLAN where the DHCP packet is received, but the port is
not
trusted
, DHCP packets are processed according to message type as
follows:
DHCP Client Packet
■
Request: Update entry in binding cache, recording client’s
DHCPv6 Unique Identifier (DUID), server’s DUID, Identity
Association (IA) type, IA Identifier, and address (4 message
exchanges to get IPv6 address), and forward to trusted port.
Содержание ECS3510-10PD
Страница 1: ...Management Guide www edge core com 10 Port Layer 2 Fast Ethernet Switch...
Страница 2: ......
Страница 4: ......
Страница 48: ...CONTENTS 48...
Страница 68: ...SECTION I Getting Started 68...
Страница 78: ...CHAPTER 1 Introduction System Defaults 78...
Страница 96: ...CHAPTER 2 Initial Switch Configuration Managing System Files 96...
Страница 98: ...SECTION II Web Configuration 98...
Страница 118: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 118...
Страница 150: ...CHAPTER 4 Basic Management Tasks Resetting the System 150...
Страница 196: ...CHAPTER 5 Interface Configuration VLAN Trunking 196 Figure 66 Configuring VLAN Trunking...
Страница 238: ...CHAPTER 7 Address Table Settings Configuring MAC Address Mirroring 238...
Страница 264: ...CHAPTER 8 Spanning Tree Algorithm Configuring Interface Settings for MSTP 264...
Страница 274: ...CHAPTER 9 Congestion Control Automatic Traffic Control 274...
Страница 288: ...CHAPTER 10 Class of Service Layer 3 4 Priority Settings 288...
Страница 304: ...CHAPTER 11 Quality of Service Attaching a Policy Map to a Port 304...
Страница 423: ...CHAPTER 13 Security Measures DHCP Snooping 423 Figure 229 Displaying the Binding Table for DHCP Snooping...
Страница 424: ...CHAPTER 13 Security Measures DHCP Snooping 424...
Страница 568: ...CHAPTER 14 Basic Administration Protocols OAM Configuration 568...
Страница 596: ...CHAPTER 15 IP Configuration Setting the Switch s IP Address IP Version 6 596...
Страница 614: ...CHAPTER 1 IP Services Configuring the PPPoE Intermediate Agent 614...
Страница 784: ...CHAPTER 20 System Management Commands Powered Device 784...
Страница 814: ...CHAPTER 22 Remote Monitoring Commands 814...
Страница 1008: ...CHAPTER 26 Interface Commands Power Savings 1008...
Страница 1022: ...CHAPTER 27 Link Aggregation Commands Trunk Status Display Commands 1022...
Страница 1052: ...CHAPTER 29 Congestion Control Commands Automatic Traffic Control Commands 1052...
Страница 1064: ...CHAPTER 31 UniDirectional Link Detection Commands 1064...
Страница 1070: ...CHAPTER 32 Address Table Commands 1070...
Страница 1130: ...CHAPTER 34 ERPS Commands 1130...
Страница 1172: ...CHAPTER 35 VLAN Commands Configuring Voice VLANs 1172...
Страница 1186: ...CHAPTER 36 Class of Service Commands Priority Commands Layer 3 and 4 1186...
Страница 1302: ...CHAPTER 38 Multicast Filtering Commands MVR for IPv6 1302...
Страница 1368: ...CHAPTER 40 CFM Commands Delay Measure Operations 1368...
Страница 1390: ...CHAPTER 42 Domain Name Service Commands 1390...
Страница 1448: ...CHAPTER 44 IP Interface Commands ND Snooping 1448...
Страница 1450: ...SECTION IV Appendices 1450...
Страница 1455: ...APPENDIX A Software Specifications Management Information Bases 1455 UDP MIB RFC 2013...
Страница 1456: ...APPENDIX A Software Specifications Management Information Bases 1456...
Страница 1464: ...APPENDIX D Compliances and Safety Statements CE Mark Declaration of Conformance for EMI and Safety EEC 1464...
Страница 1482: ...COMMAND LIST 1482...
Страница 1493: ......
Страница 1494: ...ECS3510 10PD E032014 ST R03 149100000179A...