Contents

Configuring ISDF· 1

About ISDF· 1

Procedure· 1

Configuring ISDF

About ISDF

When a network link fails, traditional routing convergence technologies based on the control plane (CP) dynamic routing protocols (for example, BGP and OSPF) can achieve convergence times in the hundreds of milliseconds. This cannot meet the stringent network performance requirements of services such as online transactions and autonomous driving. The ISDF technology can solve this problem.

Instant Silent-Fault Detection and Failover (ISDF) is a fully data plane (DP)-based fault detection and recovery technology. It represents a technological evolution from reliance on CP protocol interaction for convergence to real-time fault detection and rapid path switchover-based convergence in the DP. By using DP fault detection, remote fault advertisement, and fast-path switchover mechanisms, ISDF achieves millisecond-level network convergence, significantly improving network reliability and data transmission efficiency.

Procedure

1.     Enter system view.

system-view

2.     Enable unified flow analytics and enter UFA view.

netanalysis unified-flow

By default, UFA is disabled.

3.     Set the measurement period for fault detection.

isdf-detect period period-time

The default setting is 3000 milliseconds.

4.     Set the packet loss threshold for fault detection.

isdf-detect drop-threshold percent

The default setting is 30%.

5.     Create a UFA instance and enter its view.

instance instance-id name instance-name

By default, no UFA instances exist.

6.     Configure traffic matching rules for the UFA instance.

flow ipv4 [ source-ip src-ip-address [ src-mask-length ] | destination-ip dest-ip-address [ dest-mask-length ] | protocol { { sctp | tcp | udp } [ source-port src-port-number ] [ destination-port dest-port-number ] | protocol-number } ]*

flow ipv6 [ source-ip src-ipv6-address [ src-prefix-length ] | destination-ip dest-ip-address [ dest-prefix-length ] | protocol { { sctp | tcp | udp } [ source-port src-port-number ] [ destination-port dest-port-number ] | protocol-number } ]*

flow any-ip

By default, no traffic matching rule is configured for a UFA instance.

7.     Enable the ISDF packet drop detection feature for the UFA instance.

activate isdf-detect drop

By default, ISDF packet drop detection is disabled.

8.     Return to system view.

quit

9.     Enable ISDF and enter ISDF view.

enable

By default, ISDF is disabled.

10.     Enable ISDF reroute.

reroute enable

By default, ISDF reroute is disabled.

11.     Bind a UFA instance to ISDF and enter UFA instance view.

bind unified-flow-instance instance-id

By default, no UFA instance is bound to ISDF.

12.     Enable fault advertising for ISDF reroute.

reroute-advertise enable

By default, fault advertising for ISDF reroute is disabled.