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Ciao a tutti,
innanzi tutto complimenti per questo forum che concretamente costituisce un riferimento nel mondo CISCO.
Confido nel vostro aiuto per chiarire la natura del seguente messaggio :

11w0d: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/33 (7), with Cat2 GigabitEthernet1/21 (8)

Aggiungo che trattasi di due Cisco Catalyst 4948 collegati tra loro tramite Trunking dot1q ridondato. Il Catalyst "Cat1" fa da server mentre "Cat2" è il client;
posso confermare che il database Vlan funziona correttamente ed è allineato nei due apparati e che infine l'assegnazione delle interfacce nei due Catalyst è speculare... di seguito lo sh Vlan e la configurazione di "Cat1".
Vi ringrazio anticipatamente.

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi1/25, Gi1/26, Gi1/45, Gi1/46
Gi1/47, Gi1/48
2 dmz active Gi1/1, Gi1/2, Gi1/3, Gi1/4
Gi1/5, Gi1/6
3 db active Gi1/7, Gi1/8, Gi1/9, Gi1/10
Gi1/11, Gi1/12, Gi1/13, Gi1/14
4 routint active Gi1/15, Gi1/16
5 internet active Gi1/17, Gi1/18, Gi1/19, Gi1/20
6 man active Gi1/27, Gi1/28, Gi1/29, Gi1/30
Gi1/31, Gi1/32
7 interna active Gi1/33, Gi1/34, Gi1/35, Gi1/36
Gi1/37, Gi1/38, Gi1/39, Gi1/40
Gi1/41, Gi1/42
8 RetePubblica1 active Gi1/21, Gi1/22, Gi1/23, Gi1/24
9 RetePubblica2 active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup

version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
service compress-config
!
hostname Cat1
!
boot-start-marker
boot-end-marker
!
enable secret 5 XXXXXXXXXXXXXXXXXXXXXxxx.
!
no aaa new-model
ip subnet-zero
no ip domain-lookup
!
!
no file verify auto
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
power redundancy-mode redundant
!
!
!
vlan internal allocation policy ascending
!
interface GigabitEthernet1/1
switchport access vlan 2
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/2
switchport access vlan 2
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/3
switchport access vlan 2
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/4
switchport access vlan 2
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/5
switchport access vlan 2
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/6
switchport access vlan 2
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/7
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/8
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/9
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/10
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/11
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/12
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/13
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/14
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/15
switchport access vlan 4
switchport mode access
!
interface GigabitEthernet1/16
switchport access vlan 4
switchport mode access
!
interface GigabitEthernet1/17
switchport access vlan 5
switchport mode access
!
interface GigabitEthernet1/18
switchport access vlan 5
switchport mode access
!
interface GigabitEthernet1/19
switchport access vlan 5
switchport mode access
!
interface GigabitEthernet1/20
switchport access vlan 5
switchport mode access
!
interface GigabitEthernet1/21
switchport access vlan 8
switchport mode access
!
interface GigabitEthernet1/22
switchport access vlan 8
switchport mode access
!
interface GigabitEthernet1/23
switchport access vlan 8
switchport mode access
!
interface GigabitEthernet1/24
switchport access vlan 8
switchport mode access
!
interface GigabitEthernet1/25
!
interface GigabitEthernet1/26
!
interface GigabitEthernet1/27
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/28
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/29
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/30
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/31
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/32
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/33
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/34
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/35
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/36
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/37
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/38
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/39
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/40
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/41
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/42
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet1/43
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/44
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/45
!
interface GigabitEthernet1/46
!
interface GigabitEthernet1/47
!
interface GigabitEthernet1/48
!
interface Vlan1
ip address 192.168.X.X 255.255.255.0
!
interface Vlan4
ip address 192.168.Y.Y 255.255.255.0
!
interface Vlan7
ip address 192.168.Z.Z 255.255.255.0
!
ip route 0.0.0.0 0.0.0.0 192.168.H.H
ip http server
!
!
!
!
!
line con 0
exec-timeout 0 0
stopbits 1
line vty 0 4
exec-timeout 0 0
password XXXXXXX
login
line vty 5 15
password XXXXXX
login
!
!
end

ciao,

allora questo errore ti esce fuori perchè hai collegato tra loro due porte che nn stanno sulla stessa vlan.
secondo il messaggio d'errore hai collegato tra loro la porta gb 1/33 del cat1 alla 1/21 del cat2.
sulla gb 1/33 cat1 c'è configurata la vlan 7 mentre sulla 1/21 cat2 c'è configurata la vlan 8 (i numeri tra parentesi subito dopo il nome delle interfacce).
riguardati un poco i cablaggi, oppure metti un bel trunk!!!


ciaoooooooooo

Grazie 1000, tutto risolto.... era un problema di cablaggio.
MI TI CO!