Re: VTP Subset and Summary Advertisements

Hi Routing freak,

Summary advertisements inform switches of the current VTP domain name and
the configuration revision number.
When the switch receives a summary advertisement packet, the switch compares
the VTP domain name to its own VTP domain name. If the name is different,
the switch simply ignores the packet. If the name is the same, the switch
then compares the configuration revision to its own revision. If its own
configuration revision is higher or equal, the packet is ignored. If it is
lower, an advertisement request is sent.

When you add, delete, or change a VLAN in a Catalyst, the server Catalyst
where the changes are made increments the configuration revision and issues
a summary advertisement. One or several subset advertisements follow the
summary advertisement. A subset advertisement contains a list of VLAN
information. If there are several VLANs, more than one subset advertisement
can be required in order to advertise all the VLANs.

Kind regards,

Maarten Vervoorn
CCIE#27144

2011/7/5 Routing Freak <routingfreak_at_gmail.com>

> Hi fellows
>
> Can anyone spot me what is called as Subset and Summary advertisements in
> VTP
>
> When does both is carried . When it is used and at what is present inside
> summary and subset advertisements?
>
>
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Received on Wed Jul 06 2011 - 09:04:24 ART