Web Management Guide-R04
Table Of Contents
- How to Use This Guide
- Contents
- Figures
- Tables
- Getting Started
- Web Configuration
- Using the Web Interface
- Basic Management Tasks
- Displaying System Information
- Displaying Hardware/Software Versions
- Configuring Support for Jumbo Frames
- Displaying Bridge Extension Capabilities
- Managing System Files
- Setting the System Clock
- Configuring the Console Port
- Configuring Telnet Settings
- Displaying CPU Utilization
- Configuring CPU Guard
- Displaying Memory Utilization
- Resetting the System
- Interface Configuration
- VLAN Configuration
- Address Table Settings
- Spanning Tree Algorithm
- Congestion Control
- Class of Service
- Layer 2 Queue Settings
- Layer 3/4 Priority Settings
- Setting Priority Processing to IP Precedence/DSCP or CoS
- Mapping Ingress DSCP Values to Internal DSCP Values
- Mapping CoS Priorities to Internal DSCP Values
- Mapping Internal DSCP Values to Egress CoS Values
- Mapping IP Precedence Values to Internal DSCP Values
- Mapping IP Port Priority to Internal DSCP Values
- Quality of Service
- VoIP Traffic Configuration
- Security Measures
- AAA Authentication, Authorization and Accounting
- Configuring User Accounts
- Web Authentication
- Network Access (MAC Address Authentication)
- Configuring HTTPS
- Configuring the Secure Shell
- Access Control Lists
- Filtering IP Addresses for Management Access
- Configuring Port Security
- Configuring 802.1X Port Authentication
- DoS Protection
- DHCPv4 Snooping
- DHCPv6 Snooping
- IPv4 Source Guard
- IPv6 Source Guard
- ARP Inspection
- Application Filter
- Basic Administration Protocols
- Configuring Event Logging
- Link Layer Discovery Protocol
- Simple Network Management Protocol
- Configuring Global Settings for SNMP
- Setting Community Access Strings
- Setting the Local Engine ID
- Specifying a Remote Engine ID
- Setting SNMPv3 Views
- Configuring SNMPv3 Groups
- Configuring Local SNMPv3 Users
- Configuring Remote SNMPv3 Users
- Specifying Trap Managers
- Creating SNMP Notification Logs
- Showing SNMP Statistics
- Remote Monitoring
- Switch Clustering
- Setting a Time Range
- Ethernet Ring Protection Switching
- OAM Configuration
- Connectivity Fault Management
- Configuring Global Settings for CFM
- Configuring Interfaces for CFM
- Configuring CFM Maintenance Domains
- Configuring CFM Maintenance Associations
- Configuring Maintenance End Points
- Configuring Remote Maintenance End Points
- Transmitting Link Trace Messages
- Transmitting Loop Back Messages
- Transmitting Delay-Measure Requests
- Displaying Local MEPs
- Displaying Details for Local MEPs
- Displaying Local MIPs
- Displaying Remote MEPs
- Displaying Details for Remote MEPs
- Displaying the Link Trace Cache
- Displaying Fault Notification Settings
- Displaying Continuity Check Errors
- OAM Configuration
- UDLD Configuration
- LBD Configuration
- Smart Pair Configuration
- Multicast Filtering
- Overview
- Layer 2 IGMP (Snooping and Query for IPv4)
- Configuring IGMP Snooping and Query Parameters
- Specifying Static Interfaces for a Multicast Router
- Assigning Interfaces to Multicast Services
- Setting IGMP Snooping Status per Interface
- Filtering IGMP Query Packets and Multicast Data
- Displaying Multicast Groups Discovered by IGMP Snooping
- Displaying IGMP Snooping Statistics
- Filtering and Throttling IGMP Groups
- MLD Snooping (Snooping and Query for IPv6)
- Multicast VLAN Registration for IPv4
- Multicast VLAN Registration for IPv6
- Basic IP Functions
- IP Configuration
- General IP Routing
- IP Services
- Appendices
- Glossary
Chapter 12
| Security Measures
IPv4 Source Guard
– 387 –
Note:
Multicast addresses cannot be used by IP Source Guard.
◆ When enabled, traffic is filtered based upon dynamic entries learned via DHCP
snooping (see “DHCPv4 Snooping” on page 368), or static addresses
configured in the source guard binding table.
◆ If IP source guard is enabled, an inbound packet’s IP address (SIP option) or
both its IP address and corresponding MAC address (SIP-MAC option) will be
checked against the binding table. If no matching entry is found, the packet
will be dropped.
◆ An entry with same MAC address and a diferent VLAN ID cannot be added to
the binding table .
◆ Filtering rules are implemented as follows:
■
If DHCP snooping is disabled (see page 371), IPv4 source guard will check
the VLAN ID, source IP address, port number, and source MAC address (for
the SIP-MAC option). If a matching entry is found in the binding table and
the entry type is static IPv4 source guard binding, the packet will be
forwarded.
■
If DHCP snooping is enabled, IPv4 source guard will check the VLAN ID,
source IP address, port number, and source MAC address (for the SIP-MAC
option). If a matching entry is found in the binding table and the entry type
is static IPv4 source guard binding, or dynamic DHCP snooping binding, the
packet will be forwarded.
■
If IPv4 source guard is enabled on an interface for which IP source bindings
have not yet been configured (neither by static configuration in the IPv4
source guard binding table nor dynamically learned from DHCP snooping),
the switch will drop all IP traffic on that port, except for DHCP packets
allowed by DHCP snooping.
◆ An entry with same MAC address and a different VLAN ID cannot be added to
the binding table.
Parameters
These parameters are displayed:
◆ Port – Port identifier. (Range: 1-28)
◆ Filter Type – Configures the switch to filter inbound traffic based source IP
address, or source IP address and corresponding MAC address. (Default: None)
■
Disabled – Disables IPv4 source guard filtering on the port.
■
SIP – Enables traffic filtering based on IPv4 addresses stored in the binding
table.