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IP Overview
The Internet Protocol (IP) is a packet-based protocol used to exchange data over computer networks. IP handles addressing, fragmentation, reassembly, and protocol demultiplexing. It is the foundation on which all other IP protocols (collectively referred to as the IP Protocol suite) are built. A network-layer protocol, IP contains addressing and control information that allows data packets to be routed.
The Transmission Control Protocol (TCP) is built upon the IP layer. TCP is a connection-oriented protocol that specifies the format of data and acknowledgments used in the transfer of data. TCP also specifies the procedures that the networking devices use to ensure that the data arrives correctly. TCP allows multiple applications on a system to communicate concurrently because it handles all demultiplexing of the incoming traffic among the application programs.
TheAliwei implementation of IP provides most of the major services contained in the various protocol specifications. Aliwei IOS software also provides the TCP and User Datagram Protocol (UDP) services called Echo and Discard. Aliwei supports both TCP and UDP at the transport layer, for maximum flexibility in services. Aliwei also supports all standards for IP broadcasts.
IP addressing features such as Address Resolution Protocol (ARP), Next Hop Resolution Protocol (NHRP), and Network Address Translation (NAT) are described in the "Configuring IP Addressing" chapter. Dynamic Host Configuration Protocol (DHCP) is described in the "Configuring DHCP" chapter.
IP services such as IP access lists, Internet Control Message Protocol (ICMP), Hot Standby Router Protocol (HSRP), IP accounting, performance parameters, and MultiNode Balancing (MNLB) Forwarding Agent are described in manual "Configuring IP Services".
IP Routing Protocols
The Aliwei implementation of each IP routing protocol is discussed at the beginning of the individual protocol.
With any of the IP routing protocols, you must create the routing process, associate networks with the routing process, and customize the routing protocol for your particular network. You will need to perform some combination of the tasks in the respective chapters to configure one or more IP routing protocols.
IP Multicast
IP multicast routing provides an alternative to unicast and broadcast transmission. It allows a host to send packets to a subset of all hosts, known as group transmission. IP multicast runs on top of the other IP routing protocols.
In addition to IP multicast routing itself, other multicast features are available.
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