ewald@george# show interfaces | commands | grep ‘description\|cost’ | grep vti
set vti vti0 description ‘olivia.abcdef.be’
set vti vti0 ip ospf cost ’15’
set vti vti1 description ‘alivia.abcdef.be’
set vti vti1 ip ospf cost ’20’
ewald@lucas# show interfaces | commands | grep ‘description\|cost’ | grep vti
set vti vti0 description ‘alivia.abcdef.be’
set vti vti0 ip ospf cost ’15’
set vti vti1 description ‘olivia.abcdef.be’
set vti vti1 ip ospf cost ’20’
ewald@alivia# show interfaces | commands | grep ‘description\|cost’ | grep vti
set vti vti0 description ‘lucas.abcdef.be’
set vti vti0 ip ospf cost ’20’
set vti vti1 description ‘george.abcdef.be’
set vti vti1 ip ospf cost ’15’
ewald@olivia# show interfaces | commands | grep ‘description\|cost’ | grep vti
set vti vti0 description ‘george.abcdef.be’
set vti vti0 ip ospf cost ’15’
set vti vti1 description ‘lucas.abcdef.be’
set vti vti1 ip ospf cost ’20’

vti0 should be thought off as the horizontal lines, vti1 is the cross in the middle, left and right are location one (olivia and alivia) and two (george lucas). If a two third routers were to be connected to both routers on the same location respectively; they would receive equal metrics from announcements over both horizontal lines. in case of failure the remaining horizontal link would assume all traffic, once that fails the cross is ECMPed. set vti0 on lucas-alivia to 30 and the upper horizontal link becomes prefered path, in case the upper link fails it would ECMP over both vti1 links and finally use the backup link between lucas and alivia.