
C
HAPTER
25
| General Security Measures
IPv6 Source Guard
– 945 –
ipv6 source-guard
This command configures the switch to filter inbound traffic based on the
source IP address stored in the binding table. Use the
no
form to disable
this function.
S
YNTAX
ipv6 source-guard
sip
no ipv6 source-guard
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Interface Configuration (Ethernet)
C
OMMAND
U
SAGE
◆
Source guard is used to filter traffic on an insecure port which receives
messages from outside the network or fire wall, and therefore may be
subject to traffic attacks caused by a host trying to use the IP address
of a neighbor.
◆
This command checks the VLAN ID, IPv6 global unicast source IP
address, and port number against all entries in the binding table. Use
the
no ipv6 source guard
command to disable this function on the
selected port.
◆
After IPv6 source guard is enabled on an interface, the switch initially
blocks all IPv6 traffic received on that interface, except for ND packets
allowed by ND snooping and DHCPv6 packets allowed by DHCPv6
snooping. A port access control list (ACL) is applied to the interface.
Traffic is then filtered based upon dynamic entries learned via ND
snooping or DHCPv6 snooping, or static addresses configured in the
source guard binding table. The port allows only IPv6 traffic with a
matching entry in the binding table and denies all other IPv6 traffic.
◆
Table entries include a MAC address, IPv6 global unicast address, entry
type (Static-IPv6-SG-Binding, Dynamic-ND-Binding, Dynamic-DHCPv6-
Binding), VLAN identifier, and port identifier.
◆
Static addresses entered in the source guard binding table with the
command are automatically configured with
an infinite lease time. Dynamic entries learned via DHCPv6 snooping
are configured by the DHCPv6 server itself.
◆
If IPv6 source guard is enabled, an inbound packet’s source IPv6
address will be checked against the binding table. If no matching entry
is found, the packet will be dropped.
◆
Filtering rules are implemented as follows:
■
If ND snooping and DHCPv6 snooping are disabled, IPv6 source
guard will check the VLAN ID, source IPv6 address, and port
number. If a matching entry is found in the binding table and the
Summary of Contents for ECS4110-28T
Page 2: ......
Page 4: ......
Page 63: ...FIGURES 63 Figure 428 Configuring VLAN Translation 1177...
Page 64: ...FIGURES 64...
Page 72: ...TABLES 72...
Page 74: ...SECTION I Getting Started 74...
Page 102: ...SECTION II Web Configuration 102 General IP Routing on page 679...
Page 154: ...CHAPTER 4 Basic Management Tasks Resetting the System 154...
Page 198: ...CHAPTER 5 Interface Configuration VLAN Trunking 198 Figure 65 Configuring VLAN Trunking...
Page 272: ...CHAPTER 9 Congestion Control Automatic Traffic Control 272...
Page 286: ...CHAPTER 10 Class of Service Layer 3 4 Priority Settings 286...
Page 420: ...CHAPTER 13 Security Measures DHCP Snooping 420...
Page 566: ...CHAPTER 14 Basic Administration Protocols OAM Configuration 566...
Page 638: ...CHAPTER 15 Multicast Filtering Multicast VLAN Registration for IPv6 638...
Page 662: ...CHAPTER 16 IP Configuration Setting the Switch s IP Address IP Version 6 662...
Page 678: ...CHAPTER 17 IP Services Configuring the PPPoE Intermediate Agent 678...
Page 792: ...CHAPTER 21 System Management Commands Switch Clustering 792...
Page 822: ...CHAPTER 23 Remote Monitoring Commands 822...
Page 888: ...CHAPTER 24 Authentication Commands PPPoE Intermediate Agent 888...
Page 968: ...CHAPTER 25 General Security Measures Port based Traffic Segmentation 968...
Page 994: ...CHAPTER 26 Access Control Lists ACL Information 994...
Page 1034: ...CHAPTER 28 Link Aggregation Commands Trunk Status Display Commands 1034...
Page 1044: ...CHAPTER 29 Power over Ethernet Commands 1044...
Page 1084: ...CHAPTER 33 UniDirectional Link Detection Commands 1084...
Page 1090: ...CHAPTER 34 Address Table Commands 1090...
Page 1194: ...CHAPTER 37 VLAN Commands Configuring Voice VLANs 1194...
Page 1388: ...CHAPTER 42 CFM Commands Delay Measure Operations 1388...
Page 1410: ...CHAPTER 44 Domain Name Service Commands 1410...
Page 1420: ...CHAPTER 45 DHCP Commands DHCP Relay 1420...
Page 1472: ...CHAPTER 46 IP Routing Commands IPv4 Commands 1472...
Page 1474: ...SECTION IV Appendices 1474...
Page 1502: ...COMMAND LIST 1502...
Page 1513: ......
Page 1514: ...ECS4110 28T ECS4110 28P ECS4110 52T ECS4110 52P E072014 ST R02 150200000929A...