The relative-value is an integer ranging from -10 to 10 and is the offset between a TE metric and an IGP metric. The default value is 0.
absolutevalue
Specifies the absolute metric mode.
The value is an integer ranging from 1 to 65535.
Views
Tunnel interface view
Default Level
2: Configuration level
Task Name and Operations
Task Name
Operations
mpls-te
write
Usage Guidelines
Usage Scenario
This command is used to configure IGP metric of the TE tunnel.
Either of the following parameters is set when configuring the metric value used by a TE tunnel during IGP shortcut path calculation:
If absolute is configured, the TE tunnel metric value is equal to the configured metric value.
If relative is configured, the TE tunnel metric value is equal to the sum of the IGP route metric value and relative TE tunnel metric value.
In relative mode, the metric of a TE tunnel depends on the metric of the IGP path that actually forwards traffic in the tunnel.
When the working path of a TE tunnel is switched (for example, a primary/standby switchover or a partial FRR protection switchover), the TE tunnel metric changes accordingly. As a result, route recomputation may occur in the IGP domain, and the switching performance deteriorates sharply.
In a hot-standby switchover scenario, you can increase the WTR parameter in the mpls te backup hot-standby command in the tunnel interface view to optimize the switchover performance.
In FRR and single-LSP switchover scenarios, you can increase the values of switch-time and delete-time in the mpls te switch-delay delete-delay command to optimize the switchover performance.
Example
# Set a TE metric to a value equal an IGP metric minus 1 during SPF calculation.
<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] mpls te
[*HUAWEI-mpls] quit
[*HUAWEI] interface tunnel 1
[*HUAWEI-Tunnel1] tunnel-protocol mpls te
[*HUAWEI-Tunnel1] mpls te igp metric relative -1