Layer 2 Loop Prevention and Redundancy Solution for the Telecom Software Data Network part 1

28 0 0 0

Authorized reprint by author zhushigeng (Vinsoney)


Solution 1: MSTP

http://image.hw3static.com/hi/showimage-19312883-432623-20150123030151737001m543.jpg

MSTP is generally used to eliminate loops on Layer 2 switching networks. A spanning tree protocol, usually MSTP, is run on the core switches SW1 and SW2, and the two switch cards of an Advanced Telecommunications Application Environment (ATAE) frame. MSTP needs to be configured to ensure that the port connecting two switch cards of an ATAE frame is blocked by MSTP in the partial-ring Layer 2 network. This solution requires more data configuration and maintenance on each device compared with solution 2 and solution 3. In actual projects, MSTP is still feasible for loop prevention if there are a large number of devices, for example, more than 10 devices. Network topologies are changed and the topology redundancy is ensured by exchanging STP BPDUs. The following figure describes how MSTP works in this example.

104401s7scvpv9s0y1t9ys.png

Solution 2: Stacking

The stacking solution is more recommended for eliminating loops, but it is required that devices support the stacking feature. The stacking technology combines multiple physical devices into a single logical device. For example, two independent core switches can form a logical device, which is equivalent to a standalone switch. In addition, ATAE3.0 supports stacking of switch cards. In this solution, two core switches are stacked and two switch cards of an ATAE frame are stacked as well. In addition, the link aggregation technology is used to bond multiple physical links into a logical link to increase link bandwidth, ensure link redundancy, and eliminate loops, as shown in the following figure:

104418e2us25s2ztp2nxx9.png

The following figure describes the detailed process.

104418fe2mwnmpw2vm0uup.png

 


 


  • x
  • convention:

Reply

Reply
You need to log in to reply to the post Login | Register

Notice: To protect the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but are not limited to the following:
  • Politically sensitive content
  • Content concerning pornography, gambling, and drug abuse
  • Content that may disclose or infringe upon others ' commercial secrets, intellectual properties, including trade marks, copyrights, and patents, and personal privacy
Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see " Privacy."
If the attachment button is not available, update the Adobe Flash Player to the latest version!

Login and enjoy all the member benefits

Login
Fast reply Scroll to top