Client's forwarding VTP summary messages to VTP servers

I am using PT and setup a switch-A with a few vlans and a domain name. I then changed the VTP mode on switch-a to "client". I then connected a new switch-B to switch-A. Switch-B by default is a VTP server.I enabled vtp debugging on switch-B

this is what it said

VTP LOG RUNTIME: Summary packet rev 5 equal to domain polar rev 5

VTP LOG RUNTIME: Subset packet received, domain = polar, rev = 5, seq = 1, length = 238

How can switch-a have sent B a summary and subset packet when all the documentation I have read state that only VTP servers originate summary packets every 5 minutes or when there is a change on the network.

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Comments

njkt

VTP clients also send those periodic messages.

MrXpert

thanks, it's just confusing when I keep reading contradictory stuff from those documented sources. Bryant being one of them. I've found this guide so will focus on it
Understanding VLAN Trunk Protocol (VTP) - Cisco Systems

njkt

Where does it say clients do not send updates? it simply states that clients cannot add, delete, or updates VLANs.