User manual ZYXEL GS1510-24

[. . . ] GS1510-16/GS1510-24 16-port / 24-port Managed Gigabit Ethernet Switch Default Login Details IP Address User Name Password http://192. 168. 1. 1 admin 1234 Firmware Version 1. 00 www. zyxel. com Edition 1, 9/2010 www. zyxel. com Copyright © 2010 ZyXEL Communications Corporation About This User's Guide About This User's Guide Intended Audience This manual is intended for people who want to configure the Switch using the Web Configurator. You should have at least a basic knowledge of TCP/IP networking concepts and topology. Related Documentation · Supporting Disc Refer to the included CD for support documents. · ZyXEL Web Site Please refer to www. zyxel. com for additional support documentation and product certifications. Documentation Feedback Send your comments, questions or suggestions to: techwriters@zyxel. com. tw Thank you!The Technical Writing Team, ZyXEL Communications Corp. , 6 Innovation Road II, Science-Based Industrial Park, Hsinchu, 30099, Taiwan. Need More Help? More help is available at www. zyxel. com. GS1510 Series User's Guide 3 About This User's Guide · Download Library Search for the latest product updates and documentation from this link. [. . . ] This field displays the assigned ports that comprise the static trunk group. 13. 5 LACP Click Advanced Settings > Link Aggregation > LACP to display the following screen. See Section 13. 3. 1 on page 77 for more information on dynamic link aggregation. Figure 42 LACP GS1510 Series User's Guide 79 Chapter 13 Link Aggregation The following table describes the labels in this screen. Table 20 LACP LABEL State DESCRIPTION Select Enable from the drop down box to enable Link Aggregation Control Protocol (LACP). Select Disable to not use LACP. System Priority LACP system priority is a number between 1 and 65, 535. The switch with the lowest system priority (and lowest port number if system priority is the same) becomes the LACP "server". Enter a number to set the priority of an active port using Link Aggregation Control Protocol (LACP). Select a trunk group ID and then select whether to Enable or Disable Group Link Aggregation Control Protocol for that trunk group. The field identifies the link aggregation group, that is, one logical link containing multiple ports. This field displays if the group has LACP enabled. Group LACP Apply Refresh Group ID LACP State 80 GS1510 Series User's Guide CHAPTER 14. 1 Overview 14 Loop Guard Use the Loop Guard screen (Section 14. 3 on page 83) to configure the Switch to guard against loops on the edge of your network. Loop guard allows you to configure the Switch to shut down a port if it detects that packets sent out on that port loop back to the Switch. While you can use Spanning Tree Protocol (STP) to prevent loops in the core of your network. STP cannot prevent loops that occur on the edge of your network. Figure 43 Loop Guard vs STP STP Loop Guard 14. 2 What You Need to Know Loop guard is designed to handle loop problems on the edge of your network. This can occur when a port is connected to a Switch that is in a loop state. It happens when two ports on a switch are connected with the same cable. When a switch in loop state sends out broadcast messages the messages loop back to the switch and are re-broadcast again and again causing a broadcast storm. If a switch (not in loop state) connects to a switch in loop state, then it will be affected by the switch in loop state in the following way: GS1510 Series User's Guide 81 Chapter 14 Loop Guard · It will receive broadcast messages sent out from the switch in loop state. · It will receive its own broadcast messages that it sends out as they loop back. When broadcast or multicast packets leave port N and reach switch B, they are sent back to port N on A as they are rebroadcast from B. Figure 44 Switch in Loop State A B N The loop guard feature checks to see if a loop guard enabled port is connected to a switch in loop state. This is accomplished by periodically sending a probe packet and seeing if the packet returns on the same port. If this is the case, the Switch will shut down the port connected to the switch in loop state. The following figure shows a loop guard enabled port N on switch A sending a probe packet P to switch B. Since switch B is in loop state, the probe packet P returns to port N on A. The Switch then shuts down port N to ensure that the rest of the network is not affected by the switch in loop state. Figure 45 Loop Guard - Probe Packet A P N P B The Switch also shuts down port N if the probe packet returns to switch A on any other port. [. . . ] ZyXEL further reserves the right to make changes in any products described herein without notice. This publication is subject to change without notice. Trademarks ZyNOS (ZyXEL Network Operating System) is a registered trademark of ZyXEL Communications, Inc. Other trademarks mentioned in this publication are used for identification purposes only and may be properties of their respective owners. Certifications Federal Communications Commission (FCC) Interference Statement This device complies with Part 15 of FCC rules. Operation is subject to the following two conditions: · This device may not cause harmful interference. GS1510 Series User's Guide 175 Appendix C Legal Information · This device must accept any interference received, including interference that may cause undesired operations. FCC Warning This device has been tested and found to comply with the limits for a Class A digital switch, pursuant to Part 15 of the FCC Rules. [. . . ]