Configuring Ipv4 Is-Is Auto Frr - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
SpfNode
------------------------------------------------------------------------
>0000.0000.0001.00 T/-/-/-
0000.0000.0002.01 -/-/-/-
0000.0000.0002.02 -/-/-/-
0000.0000.0003.00 T/-/-/-
0000.0000.0003.01 T/R/-/-
0000.0000.0003.02 T/-/-/-
0000.0000.0004.00 T/-/-/-

7.11 Configuring IPv4 IS-IS Auto FRR

With IS-IS Auto FRR, traffic on a faulty link can be quickly switched to the backup link of the
faulty link. This ensures that the traffic interruption time is within 50 ms and improves the
reliability of IS-IS networks.
7.11.1 Before You Start
Before configuring IS-IS Auto FRR, familiarize yourself with the usage scenario, complete the
pre-configuration tasks, and obtain the required data. This can help you complete the
configuration task quickly and accurately.
Applicable Environment
At present, the VoIP and on-line video services require high-quality real-time transmission.
Nevertheless, if an IS-IS fault occurs, multiple processes, including fault detection, LSP update,
LSP flooding, route calculation, and FIB entry delivery, must be performed to switch the traffic
to a new link. As a result, it takes much more than 50 ms to recover the link from the fault, which
cannot meet the requirement for real-time services on the network.
IS-IS Auto FRR ensures fast switchover of traffic to the backup link before the network
convergence, avoiding traffic interruption. This protects traffic and improves reliability of an
IS-IS network. The NE80E/40E supports IPv4 IS-IS Auto FRR.
IS-IS Auto FRR is suitable for IP services that require a low delay and low packet loss ratio.
Pre-configuration Tasks
Before configuring IS-IS Auto FRR, complete the following tasks:
Issue 02 (2014-09-30)
Flags: T-System is on SPF TREE
O-System is Overload
C-Neighbor is child
G-Cost gets greater
H-Nexthop is changed
V-Link is involved
S-Link is IGP Shortcut
ISIS(1) Level-2 Shortest Path Tree
----------------------------------
NodeFlags
>0000.0000.0001.00
>0000.0000.0001.00
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
topology Red
------------
R-System is directly reachable
D-System or Link is to be deleted
P-Neighbor is parent
L-Cost gets lower
U-Protocol usage is changed
N-Link is a new path
*-Relative cost
NeighbourNode LinkCost
0000.0000.0003.01
0000.0000.0002.00
0000.0000.0002.00
0000.0000.0004.00
0000.0000.0003.01
0000.0000.0003.02
0000.0000.0003.00
0000.0000.0003.00
0000.0000.0004.00
0000.0000.0003.02
7 IS-IS Configuration
LinkFlags
10 C/-/-/-/-/-/-
0 -/-/-/-/-/-/-
0 -/-/-/-/-/-/-
0 -/-/-/-/-/-/-
0 -/-/-/-/-/-/-
10 P/-/-/-/-/-/-
10 C/-/-/-/-/-/-
0 C/-/-/-/-/-/-
0 P/-/-/-/-/-/-
0 P/-/-/-/-/-/-
0 C/-/-/-/-/-/-
10 P/-/-/-/-/-/-
567