The mpls te bandwidth change thresholds command sets the percentage threshold of the physical link bandwidth used by an MPLS TE tunnel for flooding link information.
The undo mpls te bandwidth change thresholds command restores the default settings.
If the ratio of the reserved (or released) bandwidth for a tunnel to the remaining bandwidth in a Traffic Engineering Database (TEDB) is equal to or greater than 10%, an IGP floods link information and CSPF updates the TEDB by default.
mpls te bandwidth change thresholds { down | up } percent
undo mpls te bandwidth change thresholds { down | up }
| Parameter | Description | Value |
|---|---|---|
| down | Indicates the flooding threshold of the bandwidth used by an MPLS TE tunnel. If the ratio of the bandwidth used by an MPLS TE tunnel to the remaining link bandwidth in a TEDB is equal to or greater than the threshold, an IGP floods link information and CSPF updates the TEDB. | - |
| up | Indicates the flooding threshold of the bandwidth released by an MPLS TE tunnel. If the ratio of the bandwidth released by an MPLS TE tunnel to the remaining link bandwidth in a TEDB is equal to or greater than the threshold, an IGP floods link information and CSPF updates the TEDB. | - |
| percent | Specifies the threshold as a percentage. | The value is an integer that ranges from 0 to 100. The default value is 10. |
VLANIF interface view, GE interface view, XGE interface view, MultiGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, Eth-trunk interface view
When the bandwidth changes slightly, flooding the bandwidth wastes network resources. For example, the bandwidth of a link is 100 Mbit/s. During the creation of 100 TE tunnels each with the bandwidth being 1 Mbit/s, the bandwidth of all TE tunnels needs to be flooded 100 times. If the flooding threshold is set to 10%, the first nine tunnels are created without flooding. When the tenth tunnel is created, the 10 Mbit/s bandwidth that is used by the preceding 10 tunnels is flooded. The tunnels from the eleventh tunnel to the eighteenth are created without flooding. When the nineteenth tunnel is created, the bandwidth is flooded, and so on.
# On VLANIF100, when the link bandwidth reserved for the MPLS TE tunnel exceeds 10% of the overall bandwidth or the bandwidth released by the MPLS TE tunnel exceeds 25% of the overall bandwidth, the link information is flooded.
<HUAWEI> system-view [HUAWEI] interface vlanif 100 [HUAWEI-Vlanif100] mpls [HUAWEI-Vlanif100] mpls te [HUAWEI-Vlanif100] mpls te bandwidth change thresholds up 25 [HUAWEI-Vlanif100] mpls te bandwidth change thresholds down 10
<HUAWEI> system-view [HUAWEI] interface gigabitethernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] undo portswitch [HUAWEI-GigabitEthernet0/0/1] mpls [HUAWEI-GigabitEthernet0/0/1] mpls te [HUAWEI-GigabitEthernet0/0/1] mpls te bandwidth change thresholds up 25