Why can one switch view neighbor information but cannot the other switch view neighbor information after the two S series switches establish RIP neighbor relationship

Q: Why can one switch view neighbor information but cannot the other switch view neighbor information after the two switches establish RIP neighbor relationship?

A: A switch enabled with RIP does not send the route of the interface directly connected to the neighbor. If both ends only have direct routes, only one switch can discover the neighbor.
For example, before device A and device B establish RIP neighbor relationship, if device A sends the interface route to device B, device B will discover device A. Device B then does not advertise its interface route to device A. Consequently, device A cannot discover the neighbor device B. RIP does not stipulate that whether a switch needs to send the route of the interface directly connected to the neighbor to the neighbor.
This issue occurs when Huawei's communications products establish RIP neighbor relationship.

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