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BIG-IP DNS Specialist (302)
Parte de F5 Certified Technology Specialist, BIG-IP DNS
Computer-based, multiple-choice; delivered at Pearson VUE test centers (English). Credential awarded: F5 Certified Technology Specialist, BIG-IP DNS. Prerequisite: F5 Certified BIG-IP Administrator (F5-CA).
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Section 1: DESIGN AND ARCHITECT
1.01 Identify customer requirements, constraints, and challenges related to DNS
O que saber:- Recognize the functionality and limitations of the DNS protocol (e.g., hierarchy, roles)
- Determine relevant information to gather regarding a customer's need for high availability, security, and management
Neste site: O cabeçalho DNS: opcode, status e flags, Lendo os registros em uma resposta do dig, Uma consulta, seis atendentes: a ordem de processamento do BIG-IP DNSFerramentas: dig-output-explainer1.02 Evaluate existing DNS environment for BIG-IP DNS solutions
O que saber:- Ascertain specific scope and scale of DNS requirements
- Recognize limitations imposed by the existing DNS service provider
- Identify change control procedure related the integration of BIG-IP DNS into an existing environment
1.03 Determine appropriate deployment and integration strategy for a BIG-IP DNS solution
O que saber:- Given a customer environment, requirements, and constraints, select an appropriate deployment model
- Given a customer environment, requirements, and constraints, recognize the use case for DNS Express, Zone Runner, DNS 64, DNSSEC, DNS Cache, various load balancing algorithms, persistence, and/or health monitor
1.04 Determine performance requirements for a BIG-IP DNS solution
O que saber:- Relate the performance characteristics of virtual edition and physical hardware to a specific use case
- Employ topology load balancing to optimize user experience
- Predict the performance implications pertaining to key DNS features (e.g., DNSSEC, topology LB)
Neste site: Registros de Topologia do GTM: Longest Match É uma Ordenação, Não a Escolha, Registros DNSSEC na saída do digFerramentas: f5-topology-longest-match
Section 2: IMPLEMENT
2.01 Identify configuration options for TMOS and sync groups
O que saber:- Create the proper self-IP configuration, routes, and settings for iQuery communications
- Ensure proper NTP operation of all sync group members
- Create logging profiles for DNS request and/or response
Neste site: Como o iQuery Conecta o BIG-IP DNS ao Resto da Rede, Da Interface ao Self-IP: as Dependências de Camada 2 e 3 do BIG-IP, Config Sync no BIG-IP: Quando Sincronizar, e Por Que FalhaFerramentas: iquery-protocol-explainer2.02 Identify configure options for GSLB
O que saber:- Differentiate between, and determine when to use, the two tiers of GSLB pool selection and the three tiers of virtual server selection
- Recognize the functionality of various load balancing methods (e.g., static, dynamic, and fallback)
- Recognize topology load balancing configuration parameters
2.03 Identify configuration options for non-GSLB DNS components
O que saber:- Determine the listener IP and protocol
- Configure DNS Express and DNS Cache
2.04 Identify the necessary network environment for GSLB operations
O que saber:- Recognize the significance of source and destination ports for communication between BIG-IP DNS devices
- Identify missing/non-functional network configurations when enabling GSLB operation (e.g., iQuery, generic host probing)
Ferramentas: iquery-protocol-explainer
Section 3: TEST AND TROUBLESHOOT
3.01 Determine when and how to employ the appropriate network and DNS troubleshooting tools
O que saber:- Use openssl to review trusted cert information
- Use tcpdump to capture and analyze DNS and iQuery traffic on appropriate VLAN and IP
- Use dig/nslookup to verify DNS configuration and operation
3.02 Diagnose BIG-IP DNS issues
O que saber:- Investigate root cause for virtual server flapping issue
- Analyze DNS request/response pattern to confirm BIG-IP DNS configuration, health monitor an iQuery operation
3.03 Analyze system log data and statistics for problem analysis
O que saber:- Verify the status of pools based on relevant log entries
- Analyze statistical data to pinpoint any issues regarding query response times
- Analyze appropriate log for proper zone transfer operation
Neste site: Os Arquivos de Log do BIG-IP: um Mapa do /var/log, AVR: Application Visibility and Reporting no BIG-IPFerramentas: syslog-pri-decoder3.04 Address DNS-related issues based on troubleshooting and log analysis
O que saber:- Apply config change (e.g., monitor or prober) to remedy flapping of server objects
- Address proper IP address choice(s) for iQuery communication between devices
Section 4: OPERATIONS AND SUPPORT
4.01 Identify process to perform BIG-IP DNS configuration backup
O que saber:- Perform the steps in the GUI to create system archive files
- Issue TMSH commands to create system archive files.
- Verify file creation and move to remote storage
Neste site: Arquivos UCS: o Backup do BIG-IP Que Contém TudoFerramentas: f5-tmsh-config-explainer4.02 Identify the prerequisites and procedure for BIG-IP DNS configuration restoration
O que saber:- Recognize the special requirements for restoring configuration data to a BIG-IP DNS RMA unit
- Compare configuration objects between a new BIG-IP DNS and existing sync group member
- Determine when and how to restore the master encryption keys for TSIG and DNSSEC
4.03 Identify various BIG-IP DNS monitoring strategies
O que saber:- Configure SNMP polling
- Describe and use DNS statistics and DNS analytics
Neste site: AVR: Application Visibility and Reporting no BIG-IP, Alerting Customizado no BIG-IP: Traps SNMP, E-mail e Syslog Remoto, Telemetry Streaming: A Extensão do Automation Toolchain que Observa em Vez de ConfigurarFerramentas: telemetry-streaming-explainer4.04 Recognize appropriate procedures for performing BIG-IP DNS software upgrades
O que saber:- Recognize the significance of the requirement for license reactivation prior to upgrade
- Given a GSLB configuration, predict the potential end-user impact when upgrading a DNS sync group member while it is offline
- Validate BIG-IP DNS operation status, post-upgrade
Neste site: Recuperando um BIG-IP que não carrega a config após uma atualização, A Service Check Date do BIG-IP, e por que uma atualização pode se recusar a carregar, Upgrade vs Update no BIG-IP: por que a distinção decide se a data de licença é verificada, A história operacional do BIG-IP 21.x: upgrade in-place, plano de controle 64-bit e BigD em escalaFerramentas: f5-service-check-date
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