The scenario is to analyse the VTP messages between a VTP server and a client.
Configuration on VTP server: VTP domain: MATRIX, no password is configured, mode : server
Configuration on VTP client: VTP domain: Default (Null), mode: client, no password is configured.
So i thought when i join these two switches with a trunk port, then at first the server will send a default "Summary Advertisement" without any "Followers Field" set (=0) (I mean the server won't indicate the client, that it will recieve "Subset Advertisement" immediatley after this "Summ Adver").
But what happend is server has sent the "Summary Advertisement" with a followers field set to '1',
VTP events on server switch:
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
VTP LOG RUNTIME: switchport trunk mode on Fa0/1 has changed--->>> (And also what does this line mean exactly, because already i configured this port as a turnk port)
1. Since the server switch didn't received any "Advertisement Request" from the client, then how can it send a "Summary Advertisement" with a followers field=1 ? On what basis did the VTP server sent the "Subset Advertisements" to the client ? Because the VTP server doesn't know whether the switch just joined is a client/server and whether if it is in it's domain or not ?
2. In the VTP server events i don't see a log indicating that It has transmitted a VTP "Subset Advertisement" whereas in the VTP client events it is showing a log saying that it received a "Subset Advertisement". Bolded text.
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