Packet forward method and device under PBT multi-point-to-point mode
A packet forwarding and multi-point technology, applied in the Ethernet field, can solve problems such as loops, and achieve the effect of eliminating loops, improving operating efficiency, and saving bandwidth resources.
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Embodiment 1
[0036] Referring to Figure 3, it is a schematic diagram of PBT networking in multipoint-to-multipoint mode, in which PBB edge devices a, d and e are fully connected through virtual links 3, 4 and 5, and device a is respectively connected through virtual link 1 and 2 are connected to devices b and c, and the figure only omits the PBB central device connecting edge devices a, d and e. For device a, virtual links 1, 2, 3, and 4 belong to a broadcast domain. After the broadcast function is enabled, packets will be forwarded to other virtual links except the source virtual link. Obviously, virtual links 3, 4 and 5 form a loop.
[0037] Now, let's illustrate that device a receives a message from device d. See Figure 4, including the following steps:
[0038] Step 401: On device a, configure each virtual link ID according to the attributes of each virtual link in a broadcast domain;
[0039]Among them, virtual links 3 and 4 are virtual links with network attributes, and virtual li...
Embodiment 2
[0057] Referring to FIG. 5 , it is a schematic diagram of a multipoint-to-multipoint PBT network. Compared with FIG. 3 , each virtual link of device a in FIG. 5 belongs to a different broadcast domain. Among them, virtual links 1, 2, 3 and 4 belong to broadcast domain M, while virtual links 6, 7 and 8 connected to devices f, g and h belong to broadcast domain N. Among them, devices a, g and h are fully connected, and devices g and h are connected through a virtual link 9 . For broadcast domain N, virtual links 7 and 8 have network attributes, and virtual link 6 is a virtual link with local user attributes. Each broadcast domain is distinguished by I-SID, for example, the I-SID of broadcast domain M=100, and the I-SID of broadcast domain N=200.
[0058] Since the packets that fail to look up the forwarding table are only broadcast within the broadcast domain and not to other broadcast domains, the IDs configured for each virtual link in each broadcast domain can overlap withou...
Embodiment 3
[0065] In the above two embodiments, a certain PBB edge device, such as device a, is only described from the perspective of its connection with the PBB edge device. In fact, the PBB edge device can also be directly connected to the terminal device through a physical port.
[0066] Referring to Fig. 6, compared with Fig. 3, PBB edge device a not only connects with PBB edge devices b~e through a virtual link formed by an aggregation port, but also connects with terminal devices z1 and z2 through physical ports d1 and d2 respectively.
[0067] For each broadcast domain, an ID needs to be configured for the physical port. The processing method is similar to that of a virtual link with user attributes. The ID of each physical port must be different from that of the virtual link.
[0068] For example, refer to Table 3 for the configuration of each virtual link ID and physical port ID in FIG. 6 .
[0069] table 3
[0070] label
ID
virtual link
1
ID1...
PUM
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