Admin Guide
Table Of Contents
- Contents
- Chapter 1: Introduction
- Chapter 2: New in this document
- Chapter 3: Basic administration
- Chapter 4: System startup fundamentals
- Chapter 5: Boot parameter configuration using ACLI
- Chapter 6: Run-time process management using ACLI
- Chapter 7: Chassis operations
- Chassis operations fundamentals
- Chassis operations configuration using ACLI
- Enabling jumbo frames
- Configuring port lock
- Configuring SONMP
- Viewing the topology message status
- Associating a port to a VRF instance
- Configuring an IP address for the management port
- Configuring Ethernet ports with Autonegotiation
- Enabling channelization
- Configuring serial management port dropping
- Controlling slot power
- Enabling or disabling the USB port
- Chassis operations configuration using EDM
- Editing system information
- Editing chassis information
- Configuring system flags
- Configuring channelization
- Configuring basic port parameters
- Viewing the boot configuration
- Configuring boot flags
- Enabling Jumbo frames
- Configuring the date and time
- Associating a port to a VRF instance
- Configuring CP Limit
- Configuring an IP address for the management port
- Editing the management port parameters
- Configuring the management port IPv6 interface parameters
- Configuring management port IPv6 addresses
- Auto reactivating the port of the SLPP shutdown
- Editing serial port parameters
- Enabling port lock
- Locking a port
- Viewing power information
- Viewing power status on VSP 8400
- Viewing fan information
- Viewing topology status information
- Viewing the topology message status
- Configuring a forced message control pattern
- Chapter 8: Hardware status using EDM
- Chapter 9: Domain Name Service
- Chapter 10: Licensing
- Chapter 11: Network Time Protocol
- Chapter 12: Secure Shell
- Secure Shell fundamentals
- Secure Shell configuration using ACLI
- Downloading the software
- Enabling the SSHv2 server
- Changing the SSH server authentication mode
- Setting SSH configuration parameters
- Verifying and displaying SSH configuration information
- Connecting to a remote host using the SSH client
- Generating user key files
- Managing an SSL certificate
- Disabling SFTP without disabling SSH
- Enabling SSH rekey
- Configuring SSH rekey data-limit
- Configuring SSH rekey time-interval
- Displaying SSH rekey information
- Downgrading or upgrading from releases that support different key sizes
- Secure Shell configuration using Enterprise Device Manager
- Chapter 13: System access
- System access fundamentals
- System access configuration using ACLI
- Enabling ACLI access levels
- Changing passwords
- Configuring an access policy
- Specifying a name for an access policy
- Allowing a network access to the switch
- Configuring access policies by MAC address
- System access security enhancements
- Displaying the boot config flags status
- Enabling enhanced secure mode
- Creating accounts for different access levels
- Deleting accounts in enhanced secure mode
- Configuring a password for a specific user
- Returning the system to the factory defaults
- Configuring the password complexity rule
- Configuring the password length rule
- Configuring the change interval rule
- Configuring the reuse rule
- Configuring the maximum number of sessions
- Configuring the maximum age rule
- Configuring the pre- and post-notification rule
- System access configuration using EDM
- Chapter 14: ACLI show command reference
- Access, logon names, and passwords
- Basic switch configuration
- Current switch configuration
- CLI settings
- Ftp-access sessions
- Hardware information
- NTP server statistics
- Power summary
- Power information for power supplies
- System information
- System status (detailed)
- Telnet-access sessions
- Users logged on
- Port egress COS queue statistics
- CPU queue statistics
- Chapter 15: Port numbering and MAC address assignment reference
- Chapter 16: Supported standards, RFCs, and MIBs
- Glossary
Chapter 9: Domain Name Service
The following sections provide information on the Domain Name Service (DNS) implementation for
the switch.
DNS fundamentals
This section provides conceptual material on the Domain Name Service (DNS) implementation for
the switch. Review this content before you make changes to the configurable DNS options.
DNS client
Every equipment interface connected to a Transmission Control Protocol over IP (TCP/IP) network
is identified with a unique IPv4 or IPv6 address. You can assign a name to every machine that uses
an IPv4 or IPv6 address. The TCP/IP does not require the usage of names, but these names make
the task easier for network managers in the following ways:
• An IP client can contact a machine with its name, which is converted to an IP address, based
on a mapping table. All applications that use this specific machine do not depend on the
addressing scheme.
• It is easier to remember a name than a full IP address.
To establish the mapping between an IP name and an IPv4 or an IPv6 address you use the Domain
Name Service (DNS). DNS is a hierarchical database that you can distribute on several servers for
backup and load sharing. After you add a new hostname, update this database. The information is
sent to all the different hosts. An IP client that resolves the mapping between the hostname and the
IP address sends a request to one of the database servers to resolve the name.
After you establish the mapping of IP name and IP address, the application is modified to use a
hostname instead of an IP address. The switch converts the hostname to an IP address.
If the entry to translate the hostname to IP address is not in the host file, the switch queries the
configured DNS server for the mapping from hostname to IP address. You can configure
connections for up to three different DNS servers—primary, secondary and tertiary. First the primary
server is queried, and then the secondary, and finally the tertiary.
DNS modifies Ping, Telnet, and copy applications. You can enter a hostname or an IP address to
invoke Ping, Telnet, and copy applications.
A log/debug report is generated for all the DNS requests sent to DNS servers and all successful
DNS responses received from the DNS servers.
January 2017 Administering Avaya VSP 7200 Series and 8000 Series 118
Comments on this document? infodev@avaya.com