Web Management Guide-R03
Table Of Contents
- How to Use This Guide
- Contents
- Figures
- Tables
- Getting Started
- Web Configuration
- 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
- Displaying Memory Utilization
- Resetting the System
- Interface Configuration
- VLAN Configuration
- Address Table Settings
- Spanning Tree Algorithm
- Congestion Control
- Class of Service
- Quality of Service
- VoIP Traffic Configuration
- Security Measures
- AAA Authorization and Accounting
- Configuring User Accounts
- Web Authentication
- Network Access (MAC Address Authentication)
- Configuring HTTPS
- Configuring the Secure Shell
- Access Control Lists
- Setting A Time Range
- Showing TCAM Utilization
- Setting the ACL Name and Type
- Configuring a Standard IPv4 ACL
- Configuring an Extended IPv4 ACL
- Configuring a Standard IPv6 ACL
- Configuring an Extended IPv6 ACL
- Configuring a MAC ACL
- Configuring an ARP ACL
- Binding a Port to an Access Control List
- Configuring ACL Mirroring
- Showing ACL Hardware Counters
- ARP Inspection
- Filtering IP Addresses for Management Access
- Configuring Port Security
- Configuring 802.1X Port Authentication
- DoS Protection
- IP Source Guard
- DHCP Snooping
- Basic Administration Protocols
- Configuring Event Logging
- Link Layer Discovery Protocol
- Power over Ethernet
- Simple Network Management Protocol
- Configuring Global Settings for SNMP
- Setting the Local Engine ID
- Specifying a Remote Engine ID
- Setting SNMPv3 Views
- Configuring SNMPv3 Groups
- Setting Community Access Strings
- Configuring Local SNMPv3 Users
- Configuring Remote SNMPv3 Users
- Specifying Trap Managers
- Creating SNMP Notification Logs
- Showing SNMP Statistics
- Remote Monitoring
- Switch Clustering
- IP Configuration
- IP Services
- Multicast Filtering
- Overview
- Layer 2 IGMP (Snooping and Query)
- 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 Multicast Data at Interfaces
- 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
- Basic Management Tasks
- Appendices
- Glossary
- Index
Chapter 12
| Security Measures
DHCP Snooping
– 351 –
◆ When DHCP snooping is enabled both globally and on a VLAN, DHCP packet
filtering will be performed on any untrusted ports within the VLAN.
◆ When an untrusted port is changed to a trusted port, all the dynamic DHCP
snooping bindings associated with this port are removed.
◆ Set all ports connected to DHCP servers within the local network or fire wall to
trusted state. Set all other ports outside the local network or fire wall to
untrusted state.
Parameters
These parameters are displayed:
◆ Trust Status – Enables or disables a port as trusted. (Default: Disabled)
◆ Circuit ID – Specifies DHCP Option 82 circuit ID suboption information.
■
Mode – Specifies the default string “VLAN-Unit-Port” or an arbitrary string.
(Default: VLAN-Unit-Port)
■
Value – An arbitrary string inserted into the circuit identifier field.
(Range: 1-32 characters)
Web Interface
To configure global settings for DHCP Snooping:
1. Click IP Service, DHCP, Snooping.
2. Select Configure Interface from the Step list.
3. Set any ports within the local network or firewall to trusted.
4. Specify the mode used for sending circuit ID information, and an arbitrary
string if required.
5. Click Apply
Figure 224: Configuring the Port Mode for DHCP Snooping