What are Cisco’s proprietary agreements? We all know that, unlike public agreements, private agreements are a set of self-determined agreement standards within an enterprise, which are only applicable to the equipment products produced by the enterprise. The purpose of private agreements is to achieve technological monopoly and obtain exclusive high prices profit. So as a big manufacture, what are Cisco’s private agreements? SPOTO will introduce some typical ones today.
IGRP Interior Gateway Routing Protocol IGRP is a dynamic routing protocol based on the D-V (Bellman-Ford) algorithm and adopts the distance vector algorithm. It provides a routing protocol in the form of an autonomous system, a patented protocol developed by Cisco Systems. Its algorithm is similar to Routing Information Protocol (RIP), through user configuration, such as delay, bandwidth, reliability and load is equal to the routing management performed by each router. In IGRP, Metric is the maximum transmission unit of the interface, the interface bandwidth (BANDWIDTH), the interface load rate (LOAD), the interface delay (DELAY) and the interface transmission reliability (Reliability) and other reference values, through a reasonable formula to calculate composite value.
EIGRP Enhanced Interior Gateway Routing Protocol EIGRP combines link state and distance vector routing protocols, a Cisco more here and here proprietary protocol, and uses dispersion correction algorithm (DUAL) to achieve fast convergence, and EIGRP can’t send periodic routing update information to reduce bandwidth occupation , it supports various network layer protocols such as Appletalk, IP, Novell and NetWare. However, it is worth noting that this protocol was publicized in 2013.
HSRP Hot Backup Router Protocol HSRP contains multiple routers, corresponding to one HSRP group. Only one router in the group is responsible for forwarding user traffic, and this is the active router. When the active router fails, the backup router will assume this responsibility and become the new active router. The design goals of HSRP are to support IP traffic failover under certain circumstances without causing confusion, to allow hosts to use a single router, and to maintain inter-router connectivity even if the actual first-hop router fails. The condition for realizing HSRP is that there are multiple routers in the system, they form a “hot backup group”, and this group forms a virtual router. In other words, when the source host cannot dynamically know the IP address of the first-hop router, but the HSRP protocol can protect the first-hop router from failure.
DLSW+ DLSw+ is used to solve the protocol of SNA network transmission across IP network. Currently there are standards FRC1795 and RFC2166. DLSw+ is Cisco’s own DLSw protocol based on the above standards. It is partially compatible with the RFC standard and adds many other functions. It is mainly used in finance and other SNA network environment with IBM mainframe as the core to realize SNA cross-IP transmission.
VTP Cisco VLAN Trunking Protocol VTP Cisco VLAN Trunking Protocol, also known as Virtual LAN Trunk Protocol. It is a Cisco proprietary protocol. The function is that more than a dozen switches are in the enterprise network, and the workload of configuring VLAN is heavy. You can use the VTP protocol to configure one switch as a VTP server, and other switches as VTP clients, so that they can automatically learn the VLAN information on the server.
In addition to the above-mentioned, there are many Cisco private agreements, when necessary, SPOTO will continue to introduce them for you!