TP-Link 10GE T1700G-28TQUN V1 User Guide - Page 46
Stack
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Chapter 5 Stack The stack technology is to connect multiple stackable devices through their stack ports, forming a stack which works as a unified system and presents as a single entity to the network. It enables multiple devices to collaborate and be managed as a whole, which improves the performance and simplifies the management of the devices efficiently. Advantages The stack delivers the following benefits: 1. Simplified management. After stack establishment, the user can log in the stack system through any ports of stackable devices, and manage it as a single device. You only need to configure the stack system once instead of operating repetitive configuration on multiple devices. Various ways such as SNMP, TELNET and WEB are available for users to manage the stack. 2. High reliability. The stack is highly reliable in following aspects: 1) The stack system is comprised of multiple devices among which one member device works as the stack master to take charge of the operation, management and maintenance of the stack, while the other stack members process services and keep a copy configuration file in accordance with the master for providing backup simultaneously. Once the stack master becomes unavailable, the remaining stack members elect a new master among themselves instantly and automatically, which can ensure uninterrupted services and furthermore making 1:N backup feasible. Due to the real-time configuration and data synchronization being strictly executed, the new master can take over the previous master to manage and maintain the stack system smoothly without affecting its normal operation. 2) Distributed LACP (Link Aggregation Control Protocol) supports link aggregation across devices. Since the whole stack system presents as a single device on the network, external devices can implement LACP with the stack system by connecting to several stack member devices simultaneously. Among the links between the stack system and external devices, load distribution and backup can be realized to increase the reliability of the stack system and to simplify dramatically the network topology as Figure 5-1 shows. Figure 5-1 Distributed LACP 36