Eu finalmente consegui consertar isso! Eu estava fazendo muito NAT. Desativei o nat-control, permiti comunicação no mesmo nível de segurança e me livrei da maioria das coisas Nat.
Abaixo está minha configuração de trabalho.
!
hostname Fuji
!
interface Ethernet0/0
speed 100
duplex full
nameif outside
security-level 0
ip address 10.0.0.2 255.255.255.0
no shutdown
!
interface Ethernet0/1
speed 100
duplex full
nameif cs4
no shutdown
security-level 100
ip address 10.1.4.1 255.255.255.0
!
interface Ethernet0/2
speed 100
duplex full
no shutdown
!
interface Ethernet0/2.15
vlan 15
nameif cs5
security-level 100
ip address 10.1.5.1 255.255.255.0
!
interface Ethernet0/2.16
vlan 16
nameif cs6
security-level 100
ip address 10.1.6.1 255.255.255.0
!
interface Management0/0
speed 100
duplex full
nameif management
security-level 100
ip address 10.6.0.252 255.255.255.0
!
same-security-traffic permit inter-interface
no nat-control
!
access-list acl_cs4 extended permit ip 10.1.4.0 255.255.255.0 any
access-list acl_cs5 extended permit ip 10.1.5.0 255.255.255.0 any
access-list acl_cs6 extended permit ip 10.1.6.0 255.255.255.0 any
!
access-list acl_outside extended permit ip any 10.1.4.0 255.255.255.0
access-list acl_outside extended permit ip any 10.1.5.0 255.255.255.0
access-list acl_outside extended permit ip any 10.1.6.0 255.255.255.0
!
static (outside,cs4) 0.0.0.0 0.0.0.0 netmask 0.0.0.0
static (outside,cs5) 0.0.0.0 0.0.0.0 netmask 0.0.0.0
static (outside,cs6) 0.0.0.0 0.0.0.0 netmask 0.0.0.0
!
access-group acl_outside in interface outside
access-group acl_cs4 in interface cs4
access-group acl_cs5 in interface cs5
access-group acl_cs6 in interface cs6
!
router ospf 1
network 10.0.0.0 255.255.255.0 area 1
network 10.1.4.0 255.255.255.0 area 1
network 10.1.5.0 255.255.255.0 area 1
network 10.1.6.0 255.255.255.0 area 1
log-adj-changes
!