Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document.
Note: Even the most advanced machine translation cannot match the quality of professional translators.
Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Networking Schemes for IP Network Reliability
This section describes usage scenarios of reliability schemes, focusing on FRR.
- Faults on an Intermediate Node or on the Link Connected to It - LDP FRR/TE FRR
In Label Distribution Protocol (LDP)/traffic engineering (TE) scenarios, if there are intermediate devices between PEs, use BFD to monitor the link between the PEs. - Fault on the Local Link - P2MP TE FRR
Fast reroute (FRR) can protect P2MP and P2P TE tunnels. TE FRR establishes a bypass tunnel to protect sub-LSPs. If a link fails, traffic switches to the bypass tunnel within 50 milliseconds. - Fault on the Link Between PEs
BFD can be used to monitor the link between PEs. - Fault on the Remote PE - VPN FRR
In virtual private network (VPN) FRR scenarios, BFD can be used to detect the connectivity faults between PEs. - Fault on the Downlink Interface on a PE - IP FRR
In IP FRR scenarios, when the primary path between a CE and a PE fails, traffic switches to the bypass path.
