Web Management Guide-R07
Table Of Contents
- How to Use This Guide
- Contents
- Figures
- Tables
- Getting Started
- Introduction
- Key Features
- Description of Software Features
- Configuration Backup and Restore
- Authentication
- Access Control Lists
- Port Configuration
- Rate Limiting
- Port Mirroring
- Port Trunking
- Storm Control
- Static MAC Addresses
- IP Address Filtering
- IEEE 802.1D Bridge
- Store-and-Forward Switching
- Spanning Tree Algorithm
- Virtual LANs
- IEEE 802.1Q Tunneling (QinQ)
- Traffic Prioritization
- Quality of Service
- IP Routing
- Address Resolution Protocol
- Multicast Filtering
- Link Layer Discovery Protocol
- System Defaults
- Introduction
- 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
- Using Cloud Management
- Interface Configuration
- VLAN Configuration
- Address Table Settings
- Spanning Tree Algorithm
- Congestion Control
- Class of Service
- 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
- DHCP Snooping
- IPv4 Source Guard
- ARP Inspection
- 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
- Setting a Time Range
- 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)
- Filtering and Throttling MLD Groups
- Filtering MLD Query Packets on an Interface
- IP Tools
- IP Configuration
- General IP Routing
- Unicast Routing
- Overview
- Configuring the Routing Information Protocol
- Configuring General Protocol Settings
- Clearing Entries from the Routing Table
- Specifying Network Interfaces
- Specifying Passive Interfaces
- Specifying Static Neighbors
- Configuring Route Redistribution
- Specifying an Administrative Distance
- Configuring Network Interfaces for RIP
- Displaying RIP Interface Settings
- Displaying Peer Router Information
- Resetting RIP Statistics
- IP Services
- Appendices
- Glossary
Chapter 19
| IP Services
Multicast Domain Name Service
– 531 –
◆ TTL – The time to live reported by the name server.
◆ Host – The host name associated with this record.
Web Interface
To display entries in the DNS cache:
1. Click IP Service, DNS, Cache.
Figure 357: Showing Entries in the DNS Cache
Multicast Domain Name Service
Use the IP Service > Multicast DNS page to enable multicast DNS host name-to-
address mapping on the local network without the need for a dedicated DNS
server.
Command Usage
◆ Multicast DNS allows a network device to choose a domain name in the local
DNS name space and announce it using a special multicast IP address. This
allows any user to give their computers a link-local mDNS host name of the
form “single-dns-label.local.” Any name ending in “.local.” is therefore link-local,
and names within this domain are meaningful only on the link where they
originate.
◆ When looking for the given host’s IP address, the client sends a single-shot
mDNS IP multicast query message to all the hosts sharing its local network. Any
DNS query for a name ending with “.local.” is sent to the mDNS multicast
address 224.0.0.251 (or its IPv6 equivalent FF02::FB).
The corresponding host replies with a multicast message announcing itself. All
machines in the subnet can then update their mDNS cache with the host’s
information sent in the reply message.
◆ To maintain an on-going cache of host names requires a process of continuous
multicast DNS querying. This is done in several phases:
■
Probing – The DNS responder sends a probe message to the local network
in order to verify that each entry its local cache is unique.