Message forwarding method and device in stacking system
A technology of stacking systems and messages, applied in the field of network communication, to achieve the effect of solving the broadcast loop
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Embodiment 1
[0037] The packet forwarding method in the stacking system in this embodiment may be performed by the switching device in the CB device using the packet buffering device. Such as image 3 As shown, the method includes the following steps:
[0038] Step S302, after receiving a message from other devices through the stack port, judge whether the message enters the stack system from the PE device or the CB device according to the source port information carried in the message, if the message is from the If the PE device enters the stack system, if the packet is a non-unicast packet, the horizontal stack port of the CB device performs mirroring processing on the non-unicast packet, and the non-unicast packet and the mirrored The mirror image message is sent to the message buffer device;
[0039] In the actual implementation process, after receiving a packet from outside the device, the switching device will judge whether the packet enters the stack system from the PE device or C...
Embodiment 2
[0057] The packet forwarding method in the stacking system in the second embodiment may be performed by the switching device in the CB device using the packet buffering device. Such as Figure 4 As shown, the method includes the following steps:
[0058] Step S402, after receiving a message from other devices through the stack port, judge whether the message enters the stack system from the PE device or the CB device according to the source port information carried in the message, if the message is If the packet enters the stack system from another CB device, if the packet is a non-unicast packet, determine whether the horizontal stack port that receives the non-unicast packet is the one that connects the CB device to the other CB device through the shortest forwarding path. Horizontal stacking port, if so, then send the non-unicast message to the message cache device, otherwise, discard the non-unicast message; in the case of the unicast message, send the unicast message to ...
Embodiment 3
[0084] by Figure 5 The stacking system shown is taken as an example to describe the methods in the first and second embodiments above in detail. Such as Figure 5 As shown, CB devices CB-1, CB-2, CB-3, and CB-4 are connected to each other through horizontal stack ports, and PE device PE-1 is connected to CB-1 and CB-2 through vertical stack ports, respectively.
[0085] Taking CB-2 as an example, the switch chip in CB-2 processes the packets entering the stack system from CB-1 as follows:
[0086] Step S501, the switching chip receives the message through the horizontal stacking port (denoted as PORT1) connecting the CB to CB-1;
[0087] Wherein, the source port information carried in the internal header of the message is the chip ID of a certain switch chip (marked as switch chip 1) in CB-1 and the port (marked as PORT2) that the switch chip 1 receives the message The port ID.
[0088] Step S502, the switching chip judges whether the message is a unicast message or a non...
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