Checking The Configurations - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
graceful-restart t2-interval interval-value
A value is configured for the T2 timer during the IS-IS GR.
The value of the T2 timer indicates the longest time during which the system waits for the LSDB
synchronization. Each Level-1 or Level-2 router maintains a T2 timer and disables it after the
LSDB synchronization among Level-1 or Level-2 routers ends. If LSDBs are not synchronized
yet when the T2 timer expires, the GR fails.
By default, the value of the T2 timer is 60 seconds. Keeping the default value is recommended.
Step 5 (Optional) Run:
graceful-restart interval interval-value
A value is configured for the T3 timer during the IS-IS GR.
The value of the T3 timer indicates the longest time that a GR lasts. A router disables the T3
timer after the LSDB synchronization ends in all areas. If LSDBs are not synchronized yet when
the T3 timer expires, the GR fails.
By default, the value of the T3 timer is 300 seconds. Keeping the default value is recommended.
During a GR, an IS-IS neighbor of the restarter sets the value of the T3 timer to the holdtime of
the neighbor relationship between them, which prevents routes from being recalculated on the
whole network due to a neighbor disconnection during the GR.
Step 6 (Optional) Run:
graceful-restart suppress-sa
The GR restarter is configured to suppress the Suppress-Advertisement (SA) bit of the restart
TLV.
The SA bit determines whether a neighbor (GR helper) advertises the neighbor relationship with
the restarter. The helper suppresses the advertisement of the neighbor relationship with the
restarter until the helper receives a packet in which SA is set to 0. By default, the SA bit is not
suppressed.
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7.21.4 Checking the Configurations

After configuring IS-IS GR, you can check the IS-IS GR status and parameters.
Prerequisites
IS-IS GR has been configured.
Procedure
Step 1 Run display isis graceful-restart status [ level-1 | level-2 ] [ process-id | vpn-instance vpn-
instance-name ] command to check the status of IS-IS GR.
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Issue 02 (2014-09-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
7 IS-IS Configuration

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