Loop detection introduction

29

Loop detection detects and prevents loops on VPLS networks and therefore prevents broadcast storms.

Other related questions:
Loop prevention and breaking on S series switch
For S series switches except S1700 switches, use any of the following methods to remove loops: 1. Configure features such as STP, RSTP, MSTP, VBST,RRPP, and SEP to prevent loops. 2. Bundle dual physical links into a single logical link to prevent loops while implementing redundancy and increasing bandwidth. 3. Configure the switch to transparently transmit packets of different VLANs along different paths. 4. Enable loop detection and loopback detection to detect loops on the switch or downstream network connected to the switch, and configure the switch to take the preconfigured action to remove loops. Fixed switches only support loopback detection.

Will logs be generated when loops are detected on S series switch' interfaces where loopback detection is enabled
Logs and alarms will be generated after loops are detected on modular switches' interfaces where loopback detection is enabled. To view the related alarms, run the display trapbuffer command. Only alarms will be generated after loops are detected on interfaces of fixed switches (except S1700). To view the related alarms, run the display trapbuffer command.

Why is LDP loop detection unnecessary
LSPs are generated strictly based on IP routing. Routing protocols such as OSPF and IS-IS have a mechanism to ensure loop-free routes. Therefore, LDP loop detection is unnecessary.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top