11-16-2008 12:21 PM - edited 03-04-2019 12:21 AM
I am currently configuring some embedded 3120 switches (hp blad)
I am setting up trunks between this switch
and the core switches. I am however
seeing vlans already propogated within the switch...and yet nothing was configured yet..except for assigning
on vlan (112) on all the switch ports.
There is already trunking too.
How can this switch see other vlans?
This there is no VTP either
B1.#sh vlan summary
Number of existing VLANs : 9
Number of existing VTP VLANs : 9
Number of existing extended VLANs : 0
B1#sh vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Te1/0/2, Te2/0/2
108 Pod_A_OpenNet active
112 Pod_B_OpenNet active
116 Pod_C_OpenNet active
120 Pod_D_OpenNet active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
(I edited the ports out for brevity)
11-16-2008 12:25 PM
here is the config...again...ports
have most ports left out for brevity
B1.#sh run
Building configuration...
Current configuration : 4812 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname B1.-
!
!
no aaa new-model
switch 1 provision ws-cbs3120x-s
switch 2 provision ws-cbs3120x-s
system mtu routing 1500
ip subnet-zero
!
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
interface FastEthernet0
no ip address
shutdown
!
interface GigabitEthernet1/0/1
switchport access vlan 112
spanning-tree portfast
!
interface GigabitEthernet1/0/2
switchport access vlan 112
spanning-tree portfast
!
!
interface GigabitEthernet1/0/11
switchport access vlan 112
spanning-tree portfast
!
interface GigabitEthernet1/0/12
switchport access vlan 112
spanning-tree portfast
!
interface GigabitEthernet1/0/13
switchport access vlan 112
spanning-tree portfast
!
interface GigabitEthernet1/0/14
switchport access vlan 112
!
interface GigabitEthernet1/0/25
switchport access vlan 112
!
i
!
interface TenGigabitEthernet2/0/2
switchport mode trunk
!
interface Vlan1
no ip address
shutdown
!
ip classless
ip http server
!
!
control-plane
!
!
line con 0
line vty 5 15
!
end
11-16-2008 12:37 PM
Richard
Have you got VTP configured on your core switches and if so what mode ie. server/client/transparent and do you have a VTP password set.
Jon
11-16-2008 04:40 PM
hi jon-
no we do not have vtp configured in our network
the vtp mode of the switch is at the default
of server
11-16-2008 04:53 PM
Because one is setup as server then the other switches are probably set as server or client and thus recieved any vlans that were configured on the vtp server switches.
11-16-2008 07:12 PM
probably it has something to do with DTP if the core switch's interface is configured as a trunk, then the switch is in desirable mode by default so that makes the trunking works.
11-16-2008 10:54 PM
Hi,
Could you please post the (Sh vtp status) from the Switchs?
This should only happens if you have VTP configured as Server/client or Server/Server.
HTH
Mohamed
11-17-2008 06:18 PM
1-2-1#sh vtp status
VTP Version : running VTP1 (VTP2 capable)
Configuration Revision : 4
Maximum VLANs supported locally : 1005
Number of existing VLANs : 9
VTP Operating Mode : Server
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0x86 0x15 0xA7 0xE7 0x99 0xEA 0x57 0x53
Configuration last modified by 0.0.0.0 at 6-5-93 21:34:37
Local updater ID is 0.0.0.0 (no valid interface found)
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