A method for link aggregation failure protection, comprising: receiving (S101, S201) failure information from a first aggregation device of the two or more aggregation devices at a second aggregation device of two or more aggregation devices, the first aggregation device being connected to a failed physical link, wherein the failure information comprises a failure location of the failed physical link and an identity of one or more corresponding logical link, the failed physical link and one or more physical link form a link aggregation group, LAG, each physical link in the LAG corresponds to logical links with a same identity, and the logical links with the same identity in the LAG correspond to a telecom provider, RSP, device of a backbone layer and a receiving device of an access layer, the logical links forward data separately through the two or more aggregation devices at an aggregation layer, wherein the aggregation layer is located between the backbone layer and the access layer; according to the failure location and the identity of the one or more corresponding logical link, bundling, by the second aggregation device, a first logical link corresponding to the failed physical link with a second logical link corresponding to a physical link without failure in the LAG to form a logical link aggregation, the first logical link having the same identity as the second logical link; and transmitting, by the second aggregation device, through the logical link aggregation, one or more data packets sent to the failed physical link, according to the identity of the logical link specified in the header of the one or more data packets. receiving (S101, S201) failure information from a first aggregation device of the two or more aggregation devices at a second aggregation device of two or more aggregation devices, the first aggregation device being connected to a failed physical link, wherein the failure information comprises a failure location of the failed physical link and an identity of one or more corresponding logical link, the failed physical link and one or more physical link form a link aggregation group, LAG, each physical link in the LAG corresponds to logical links with a same identity, and the logical links with the same identity in the LAG correspond to a telecom provider, RSP, device of a backbone layer and a receiving device of an access layer, the logical links forward data separately through the two or more aggregation devices at an aggregation layer, wherein the aggregation layer is located between the backbone layer and the access layer; according to the failure location and the identity of the one or more corresponding logical link, bundling, by the second aggregation device, a first logical link corresponding to the failed physical link with a second logical link corresponding to a physical link without failure in the LAG to form a logical link aggregation, the first logical link having the same identity as the second logical link; and transmitting, by the second aggregation device, through the logical link aggregation, one or more data packets sent to the failed physical link, according to the identity of the logical link specified in the header of the one or more data packets.