(Optional) Blocking Synchronization Between LDP and IGP on an Interface
Context
After the ldp-sync enable command is run in an IGP process, the following situations occur:
- On a P2P network, the interfaces whose neighbor status is Up implement synchronization between LDP and IGP.
- On a broadcast network, if the IGP is OSPF, the interfaces (whose neighbor status is Up) connecting the DR and a non-DR (or BDR) implement synchronization between LDP and IGP; if the IGP is IS-IS, the interfaces (whose neighbor status is Up) connecting the DIS and a non-DIS implement synchronization between LDP and IGP.
For the interfaces on a device bearing key services, ensure that this device detours around the backup path. You can block synchronization between LDP and IGP on a specified interface of the switch.
Procedure
- If OSPF is used for IGP, perform the
following steps on the interfaces on both ends of the link between
the node (where the primary LSP and the backup LSP diverge from each
other) and its LDP peer on the primary LSP.
- 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
- If IS-IS is used for IGP, perform the
following steps on the interfaces on both ends of the link between
the node (where the primary LSP and the backup LSP diverge from each
other) and its LDP peer on the primary LSP.
- 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
