The mpls rsvp-te hello command in the MPLS view globally enables the Hello mechanism. The mpls rsvp-te hello command in the interface view enables the Hello mechanism on an interface after it is enabled in the MPLS view.
The undo mpls rsvp-te hello command in the interface view disables the Hello mechanism globally and on interfaces.
This command varies in transport and router modes. For detailed differences, see Differences Between Commands in Transport and Router Modes. This topic describes the command configuration in router mode.
By default, the RSVP Hello extension is disabled.
100ge sub-interface view, 100GE interface view, 10GE sub-interface view, 10GE interface view, 25GE sub-interface view, 25GE interface view, 400GE sub-interface view, 400GE interface view, 40GE sub-interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk sub-interface view, Eth-Trunk interface view, GE optical interface view, GE sub-interface view, GE electrical interface view, GMPLS-UNI interface view, Tunnel interface view, XGE sub-interface view, XGE interface view
Usage Scenario
The Hello mechanism rapidly detects neighbor connectivity. Avoid overuse because it increases communication costs.
Prerequisites
RSVP-TE has been enabled.
Precautions
The undo mpls rsvp-te hello command in the MPLS view disables the Hello function from all interfaces, disables GR on the local node, and deletes all sessions with the specified node ID.
<HUAWEI> system-view [~HUAWEI] mpls [*HUAWEI-mpls] mpls te [*HUAWEI-mpls] mpls rsvp-te [*HUAWEI-mpls] mpls rsvp-te hello [*HUAWEI-mpls] quit [*HUAWEI] interface GigabitEthernet 0/1/0 [*HUAWEI-GigabitEthernet0/1/0] mpls [*HUAWEI-GigabitEthernet0/1/0] mpls te [*HUAWEI-GigabitEthernet0/1/0] mpls rsvp-te [*HUAWEI-GigabitEthernet0/1/0] mpls rsvp-te hello