Ngoài ra các công nghệ vô tuyến mà cho phép mạng WLAN, các công nghệ khác được sử dụng để cung cấp bảo mật, hiệu quả và ổn định cho mạng không dây địa phương. IS-IS, bị lãng quên bỏ qua liên kết nhà nước giao thức định tuyến. Tốt hơn người anh em họ nổi tiếng, OSPF, có tất cả nhưng lu mờ nó. Tiếp tục làm trầm trọng bỏ bê của IS-IS là một thực tế | 424 Chapter 4 IP Addressing Multicasting and IPv6 ICMPv6 informational messages have the same format as the ICMPv6 error type field values for informational messages range from 128 to shows some of the common type fields for ICMPv6 informational messages. Table ICMPv6 Informational Messages Type Field Value ICMPv6 Informational Message 128 129 130 131 132 133 134 135 136 137 Echo Request Echo Reply Multicast Listener Query Multicast Listener Report Multicast Listener Done Router Solicitation Router Advertisement Neighbor Solicitation Neighbor Advertisement Redirect Understanding Neighbor Discovery IPv6 s Neighbor Discovery protocol is used to obtain information that facilitates the packet-forwarding process. The information gathered by the Neighbor Discovery protocol can be used for Next Hop Determination Address Resolution Prefix Discovery Parameter Discovery Redirection Several ICMPv6 messages are used in the Neighbor Discovery protocol. which are discussed later. Router Solicitation and Advertisement During the autoconfiguration process after the workstation generates a unique link-local address it queries for a router. The workstation sends a Router Solicitation message and listens for a Router Advertisement message. The presence of a router indicates that there may be other subnets connected to the router. Each subnet must have its own subnet identifier because routing is dependent on unique subnet numbers. Host identifiers are not used to make routing decisions. The workstation address must now have a unique subnet identifier. The link-local address with its zero subnet ID is not sufficient for inter-subnet communications. IP Addressing Multicasting and IPv6 Chapter 4 425 The Router Advertisement contains a network number or prefix may contain an aggregatable global unicast prefix or simply a subnet identifier. Router Advertisements for each router interface contain different prefix .
