terraform init terraform init -upgrade terraform validate terraform import <resource address> <resource id> terraform plan terraform plan -destroy terraform plan -out=FILE terraform plan -refresh-only terraform apply terraform destroy terraform refresh terraform state mv <old_name> <new_name> terraform taint terraform fmt terraform state list terraform state show terraform.tfstate workspaces local-exec provisioner remote-exec provisioner Collection function: slice String …
Subscription VNet VNet Create VM Creation Installing Internet Information Services on the machine Virtual Networking Peering – Implementation Subnet Lab – User Defined Routes (Static Route) – Route Table NSG (ACL & Stateful) Network Security Groups – Subnet NSG Application Security Groups Lab – Application Security Groups Virtual Machine Scale Sets Lab – Virtual Machine …
AZ-900 Module 1: Cloud concepts 1. Cloud Characteristics 2. Principle of economies of scale: 如團購, cloud愈大愈平 3. CapEx vs OpEx 4. Consumption-based Model, 你用乜(vm, storage, app), 用幾多比幾多 5. IaaS vs PaaS vs SaaS cloud service models On-Premise IaaS PaaS SaaS Applications [Data, Apps] Own Own Own MS Runtime [IIS, Docker] Own Own MS MS Middleware …
MTU Size
Network Presentation STP There are three types of Spanning Tree Protocol. They are Per VLAN Spanning Tree Protocol, Rapid Spanning Tree Protocol and Multiple Spanning Tree Protocol. —STP TypesPer VLAN Spanning Tree Protocol is the original STP that detects and prevent loops. Rapid Spanning Tree Protocol improves on the original protocol by introducing faster convergence …
PIM 為建立Multicast Routing Table, 利用RPF checking技術, 在Routing Table(其實是rpf table)查找Source Address是否從best path 來 R1# show ip rpf 192.168.15.5 //查best pathRPF interface: Eth0/2 1. PIM-DM基本玩法 Source 強推Multicast Packet 到所有Host, RPF checking, 查Packet source IP 是經Best Path(如有兩條, 揀next hop大IP)而來, 才繼續強推, 繼而產生SPT(Shortest Path Tree) 如Best Path interface沒有啟動DM, 則會斷路, 可用Multicast Static Route 改路 R2(config)#ip mroute 192.168.15.5 255.255.255.255 192.168.24.4 如有Router認為自己不用Multicast, 可對上游Prune …
QoS 基本慨念 Classification 就只是group一堆Address class-map match-all CLASS-EF match access-group name TRAFFIC-VOICEclass-map match-any CLASS-AF11 match protocol snmp match protocol sshclass-map match-all CLASS-AF43 match ip dscp af43 ip access-list extended TRAFFIC-VOICE permit ip 192.168.100.0 0.0.0.255 any Marking Packet IP Header中有8bit用作ToS, router 可 mark IPP/DSCP 在ToS中, mark一直跟著packet。Mark在已有mark的packet則會Override。 policy-map POLICY-INCOMING class CLASS-EF set dscp ef class CLASS-AF11 set dscp …
Optical Fiber Cable 光纖 (Fiber) Multi-mode Fiber (MMF) Single Mode Fiber (SMF) 訊號衰減 Module Connector
Automation Tools Puppet 要點 -agent-base-Pull model-TCP port 8140 to reach Master-works on Linux/Unix-Open source /paid enterprise-domain-specific language (DSL) 架構 Module Manifests 指令 class cnos::vlan { cnos_vlan { ’10’: ensure => ‘present’, vlan_id => 10, admin_state => ‘up’, vlan_name => ‘9tut’, } } $ puppet apply vlan.pp Notice: Compiled catalog for puppetmaster.9tut in environment production in …
關於NAT
