L3 switch port vs vlan interface question

Hi Guys,

I have some doubts about a config a colleague of me is doing using L3
Catalyst
switches: in order to have IP communication on 2 linked switches, he is
using a
L3 port on each one, and conecting this port (with a cable) to a L2 port of
a
common vlan (in each switch)... As the vlan crosses the switches and has L2
ports on each one, he can connect another L3 port, with the same ip network,
to
a port of the second switch and have the 2 switches speaking IP in this
vlan

My first impression was "this can be or could be a potential loop, why not
using the Vlan interface, that is done for this cases?"... Anyway, since he
told me that is plannig to run BGP and he does not like a vlan interface as
bgp speaker, i am wondering if there are reasons to totally reject this
strange/curious design.

Anyone can provide help to see the possible problems of this scenario on a
production environment, please?

TIA and best regards.

-- 
Juan
Blogs and organic groups at http://www.ccie.net