BFD message structure, detection method and device based on mpls-tp linear protection
A linear protection and detection method technology, applied in the field of communication, to achieve the effect of fast path connectivity check
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Embodiment 1
[0028] Such as figure 2 As shown, a BFD packet structure based on MPLS-TP linear protection, the authentication method includes: Ethernet packet header; MPLS packet header, whose label value is the primary tunnel label or standby tunnel of the MPLS-TP linear protection group Label; IP packet header, whose source IP address is NODE_ID of the local MEG, and destination IP address 127 / 24; UDP packet header, whose destination port number is the standard BFD port number, marked as a BFD control packet; and , BFD control packet content.
[0029] During specific operations, the length of the Ethernet message header can be 14 bytes; the length of the MPLS message header can be 4 bytes; the length of the IP message header can be 20 bytes, and / or, The UDP message header may be 8 bytes. The BFD message is a standard IP message (not the GAL+ACH+BFD control message format with double labels used by the IETF standard), the BFD control message is carried in UDP, and the destination port n...
Embodiment 2
[0032] Such as image 3 As shown, a BFD detection method based on MPLS-TP linear protection includes:
[0033] First, configure static parameters of BFD on the MEP of the device;
[0034] Secondly, send the BFD configuration parameters to the FPGA, and complete the encapsulation and sending and receiving of the BFD message in the FPGA;
[0035] Then, the encapsulated BFD performs label forwarding along the tunnel path of MPLS-TP;
[0036] Thirdly, according to whether the BFD message is sent and received normally, corresponding detection determines whether the tunnel path of the MPLS-TP is normal or abnormal.
[0037] During specific operations, the static parameters include at least one of the following parameters: a local identifier, a remote identifier, a minimum packet sending interval, a minimum packet receiving interval, and a detection multiple of the BFD session. The minimum packet sending interval is 3.3ms, and / or, the detection multiple is 3. The FPGA is used as th...
Embodiment 3
[0046] Such as Figure 4 As shown, another BFD detection method based on MPLS-TP linear protection includes:
[0047] Step 1: The device supports configuring BFD sessions on MEPs under the ITU-T MPLS-TP standard, and configure static parameters of BFD on the MEPs of the device to support the creation of BFD sessions between MEGs; the static parameters include local identifiers, Remote identification, minimum packet receiving interval, minimum packet sending interval, detection multiple, etc.;
[0048] Step 2: The software checks the BFD configuration parameters and stores the BFD session information at the protocol layer;
[0049] Step 3: Whether the MPLS-TP tunnel that BFD needs to detect is normal, and whether the BFD parameters are reasonable;
[0050] Step 4: The MPLS-TP tunnel is normal and the BFD parameters are reasonable, then the detection and binding relationship between the BFD session and the MPLS-TP tunnel is completed;
[0051] Step 5: Start the encapsulation ...
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