A method for automatically implementing in-band operation administration maintenance IOAM encapsulation, the method comprising steps of: sending, at an IOAM ingress node, a first message carrying IOAM configuration request information to an IOAM centralized configuration point; receiving, at the IOAM ingress node, a second message carrying IOAM configuration information of IOAM transmission nodes sent from the IOAM centralized configuration point; and performing, at the IOAM ingress node, IOAM encapsulation on a service data message according to the IOAM configuration information of the IOAM transmission nodes; characterized in that the method further comprises: obtaining, at the IOAM ingress node, an identifier of each IOAM transmission node on a service data message transmission path, wherein the service data message transmission path represents the sequence of IOAM transmission nodes through which a service data message passes; and carrying the IOAM configuration request information together with the identifiers of each said IOAM transmission nodes in the first message, wherein the identifier of each IOAM transmission node is configured to indicate to the IOAM centralized configuration point to carry the IOAM configuration information of each IOAM transmission node corresponding to the identifier of the IOAM transmission node in the second message. sending, at an IOAM ingress node, a first message carrying IOAM configuration request information to an IOAM centralized configuration point; receiving, at the IOAM ingress node, a second message carrying IOAM configuration information of IOAM transmission nodes sent from the IOAM centralized configuration point; and performing, at the IOAM ingress node, IOAM encapsulation on a service data message according to the IOAM configuration information of the IOAM transmission nodes; characterized in that the method further comprises: obtaining, at the IOAM ingress node, an identifier of each IOAM transmission node on a service data message transmission path, wherein the service data message transmission path represents the sequence of IOAM transmission nodes through which a service data message passes; and carrying the IOAM configuration request information together with the identifiers of each said IOAM transmission nodes in the first message, wherein the identifier of each IOAM transmission node is configured to indicate to the IOAM centralized configuration point to carry the IOAM configuration information of each IOAM transmission node corresponding to the identifier of the IOAM transmission node in the second message. obtaining, at the IOAM ingress node, an identifier of each IOAM transmission node on a service data message transmission path, wherein the service data message transmission path represents the sequence of IOAM transmission nodes through which a service data message passes; and carrying the IOAM configuration request information together with the identifiers of each said IOAM transmission nodes in the first message, wherein the identifier of each IOAM transmission node is configured to indicate to the IOAM centralized configuration point to carry the IOAM configuration information of each IOAM transmission node corresponding to the identifier of the IOAM transmission node in the second message.