Is it possible to allow 2 VTP domain to communicate without using any router? The customer just want to use 2 port from each switch to act as the link.
I am thinking of using the same VLAN on both VTP domain to act as a link. Is that possible?
You sure can. As you mentioned, you can have a regular VLAN link between the 2 VTP domain switches. But it does not scale if you have too many VLANs, so if you have a router in both domains, run some routing protocol on both
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