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CLI-based Configuration Guide - Reliability

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides guidance for configuring reliability services, including interface backup, BFD, VRRP, and EFM.
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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 6-4, a BFD session detects a single-hop path between two devices. The BFD session is bound to the outbound interface.

Figure 6-4  Single-hop BFD for IP links

In Figure 6-5, a BFD session detects a multi-hop path between RouterA and RouterC. The BFD session is bound to the peer IP address, not the outbound interface.

Figure 6-5  Multi-hop BFD for IP links
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Updated: 2019-03-06

Document ID: EDOC1100069338

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