Backup designated router (BDR) election and designated router (DR) failure processing methods and equipment
AssigneeXi'an Zhongxing New Software Co., Ltd.
InventorsBenchong Xu, Zheng Zhang
Life of this patent
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Abstract
Backup Designated Router (BDR) election and Designated Router (DR) failure processing methods and equipment are provided. When a user joins, a BDR in a subnetwork completes a preparation for forwarding multicast traffic for the user, but does not forward the multicast traffic through an interface; and when detecting that a DR in the subnetwork fails, the BDR is switched to be a DR in the subnetwork, and forwards the multicast traffic for the user through the interface.
Claims19
A Backup Designated Router (BDR) election method, the method comprising:
- electing, by Protocol Independent Multicast (PIM) equipment, a BDR in a subnetwork;
- and
- storing, by the PIM equipment, information of the elected BDR in the subnetwork, and sending, by the PIM equipment, a Hello message through an interface, the Hello message carrying the stored information of the BDR in the subnetwork;
- wherein, in a case where the PIM equipment receives, in an election waiting state, a Hello message through an interface and the Hello message carries information of a BDR, electing, by the PIM equipment, the BDR in the subnetwork comprises:
- determining, by the PIM equipment, the BDR carried in the received Hello message as the BDR elected by the PIM equipment.
A Designated Router (DR) failure processing method, comprising:
- when a user joins, completing a preparation for forwarding multicast traffic for the user but not forwarding the multicast traffic through an interface by a Backup Designated Router (BDR) in a subnetwork;
- and
- when detecting that a DR in the subnetwork fails, automatically switching the BDR to be a DR in the subnetwork, and forwarding, by the BDR, the multicast traffic for the user through the interface.
Protocol Independent Multicast (PIM) equipment comprising:
- an election module, configured to elect a Backup Designated Router (BDR) in a subnetwork;
- and
- a storage module, configured to store information of the BDR in the subnetwork;
- the PIM equipment being further configured to, after the information of the BDR in the subnetwork is stored, send a Hello message, the Hello message carrying the information, stored by the storage module, of the BDR in the subnetwork;
- wherein the election module is further configured to:
- in a case where the interface module receives, in an election waiting state, a Hello message and the Hello message carries information of a BDR, determine the BDR carried in the received Hello message as the BDR elected by the election module.
Dependencies are inferred from the claim text.