>sh run покажите
Current configuration : 8029 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Imedia-main
!
enable secret 5 some
enable password оченькрутойпароль
!
no aaa new-model
switch 1 provision ws-c3750g-24t
vtp domain SOME
vtp mode transparent
ip subnet-zero
ip routing
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
vlan XXX-XXX
!
interface GigabitEthernet1/0/1
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/2
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/3
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/4
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/5
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/6
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/7
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/8
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/9
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/10
no switchport
ip address ИП МАСКА
!
interface GigabitEthernet1/0/11
switchport trunk encapsulation dot1q
switchport trunk allowed vlan XXX-XXX
switchport mode trunk
!
interface GigabitEthernet1/0/12
switchport trunk encapsulation dot1q
switchport trunk allowed vlan XXX-XXX
switchport mode trunk
!
interface GigabitEthernet1/0/13
switchport trunk encapsulation dot1q
switchport trunk allowed vlan XXX-XXX
switchport mode trunk
!
interface GigabitEthernet1/0/14
switchport trunk encapsulation dot1q
switchport trunk allowed vlan XXX-XXX
switchport mode trunk
!
interface GigabitEthernet1/0/15
!
interface GigabitEthernet1/0/16
!
interface GigabitEthernet1/0/17
switchport access vlan XXX
switchport mode access
!
interface GigabitEthernet1/0/18
no switchport
ip address some
!
interface GigabitEthernet1/0/19
!
interface GigabitEthernet1/0/20
!
interface GigabitEthernet1/0/21
switchport access vlan 20
switchport mode access
!
interface GigabitEthernet1/0/22
switchport access vlan 20
switchport mode access
!
interface GigabitEthernet1/0/23
switchport access vlan 20
switchport mode access
!
interface GigabitEthernet1/0/24
!
interface Vlan1
no ip address
shutdown
!
interface VlanXXX
ip address какие-то
!
interface VlanXXX
ip address 10.156.86.253 255.255.255.0
!

ip default-gateway какойто
ip classless
ip route profile
ip route 0.0.0.0 0.0.0.0 через что-то
ip route 10.0.0.0 255.0.0.0 10.xxx.xxx.1
... длинная табла про роутинг ....
ip http server
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
line vty 0 4
password хитрый пасворд
no login
line vty 5 15
password хитрый пасворд
no login
!
end