Configuring Bandwidth Information Flooding
Usage Scenario
If the link bandwidth changes slightly, the threshold for flooding bandwidth information is set on the ingress or a transit node of a CR-LSP, which reduces flooding attempts and saves network resources.
To synchronize data between TEDBs in an IGP area, OSPF TE is configured to update TEDB information and flood bandwidth information if the remaining bandwidth changes on an MPLS interface.
- Configure flooding commands to enable immediate bandwidth information flooding on a device.
- Configure a flooding interval to enable periodic bandwidth information flooding on a device.
- Configure a flooding threshold to prevent frequent flooding.
- When the percentage of the bandwidth reserved for the MPLS TE tunnel on a link to the remaining link bandwidth in the TEDB is greater than or equal to the configured threshold (flooding threshold), OSPF TE flood link bandwidth information to all devices in this area and update TEDB information.
- When the percentage of the bandwidth released by the MPLS TE tunnel to the remaining link bandwidth in the TEDB is greater than or equal to the configured threshold, OSPF TE flood link bandwidth information to all devices in this area and update TEDB information.
Procedure
- Configure forcible bandwidth information flooding.
- Configure periodic bandwidth information flooding.
- Configure a flooding threshold.
- On an Ethernet interface, run undo portswitch
The interface is switched to Layer 3 mode.
By default, an Ethernet interface works in Layer 2 mode.
The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.
If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.
- On an Ethernet interface, run undo portswitch
