ipv4 网络

IPv4 Addressing

IP address

NetworkIDs and Subnet Masks

255.255.255.0 or /24 is not a IP address, it just tells you how many binary number of a network id should have.

IPv4 Classes

• IP classes provide a default mask based on the number in the first octet.

VLAN

• Multiple networks/LANs on the same physical network switch.
• Traffic is logically separated between VLANs.
• VLANs provide logical segmentation of networks.

F5 Local Traffic Manager (LTM)

Virtual Server

A virtual server is one of the most important components of any BIG-IP Local Traffic Manager configuration. When you configure a virtual server, you create two Local Traffic Manager (LTM) objects: a virtual server and a virtual address.

A virtual server is a traffic-management object on the BIG-IP system that is represented by an IP address and a service.

A primary purpose of a virtual server is to load balance traffic across a pool of servers on an internal network. Virtual servers increase the availability of resources for processing client requests.

Virtual addresses

A virtual address is the IP address with which you associate a virtual server. For example, if a virtual server’s IP address and service are 10.10.10.2:80, then the IP address 10.10.10.2 is a virtual address.

You can create a many-to-one relationship between virtual servers and a virtual address. For example, you can create the three virtual servers 10.10.10.2:80, 10.10.10.2:443, and 10.10.10.2:161 for the same virtual address, 10.10.10.2.