### VLAN trunking

#
#                             opeth(VLAN 200)  grave(VLAN 200)
#                                 \              / 
#                      immortal - [s1] -------- [s2] 
#                                 /              \
#                              syl(VLAN 100)   nile(VLAN 100)
# 

SWITCH s1
SWITCH s2
TRUNK  s1 s2 

HOST debian  syl      s1
HOST debian  nile     s2
HOST debian  opeth    s1
HOST debian  grave    s2
HOST debian  immortal s1