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S12700 V200R010C00 Configuration Guide - Reliability

This document describes the configuration of BFD, DLDP, VRRP, SmartLink, CFM, EFM, Y.1731 and MAC swap loopback to ensure reliability on the device.
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BFD for IP Links

BFD for IP Links

You can create a single-hop or multi-hop BFD session on an IP link to detect faults quickly:

  • Single-hop BFD detects IP connectivity of the forwarding link between two directly connected systems.

  • Multi-hop BFD detects IP connectivity of paths between two indirectly connected systems. These paths may span multiple hops or overlap.

Application

In Figure 2-4, a BFD session detects a single-hop path between two devices. The BFD session is bound to the outbound interface.

Figure 2-4  Single-hop BFD for IP links

In Figure 2-5, a BFD session detects a multi-hop path between SwitchA and SwitchC. The BFD session is bound to the peer IP address, not the outbound interface.

Figure 2-5  Multi-hop BFD for IP links
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Updated: 2019-04-20

Document ID: EDOC1000142090

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