VTP Mode Not Working

brijendrasaini · ‎08-24-2017

Dear Team,

I am just try to imlemnt VTP moder but clinet not taking data from server configuration as below :

Current configuration : 1057 bytes

!

version 12.1

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname Switch

!

spanning-tree mode pvst

!

interface FastEthernet0/1

switchport mode trunk

!

interface FastEthernet0/2

!

interface FastEthernet0/3

!

interface FastEthernet0/4

!

interface FastEthernet0/5

!

interface FastEthernet0/6

!

interface FastEthernet0/7

!

interface FastEthernet0/8

!

interface FastEthernet0/9

!

interface FastEthernet0/10

!

interface FastEthernet0/11

!

interface FastEthernet0/12

!

interface FastEthernet0/13

!

interface FastEthernet0/14

!

interface FastEthernet0/15

!

interface FastEthernet0/16

!

interface FastEthernet0/17

!

interface FastEthernet0/18

!

interface FastEthernet0/19

!

interface FastEthernet0/20

!

interface FastEthernet0/21

!

interface FastEthernet0/22

!

interface FastEthernet0/23

!

interface FastEthernet0/24

!

interface Vlan1

no ip address

shutdown

!

interface Vlan20

ip address 192.168.0.1 255.255.255.0

!

line con 0

!

line vty 0 4

login

line vty 5 15

login

!

end

Switch#show vlan

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Fa0/2, Fa0/3, Fa0/4, Fa0/5

Fa0/6, Fa0/7, Fa0/8, Fa0/9

Fa0/10, Fa0/11, Fa0/12, Fa0/13

Fa0/14, Fa0/15, Fa0/16, Fa0/17

Fa0/18, Fa0/19, Fa0/20, Fa0/21

Fa0/22, Fa0/23, Fa0/24

20 dc_indore active

30 dc_2 active

1002 fddi-default act/unsup

1003 token-ring-default act/unsup

1004 fddinet-default act/unsup

1005 trnet-default act/unsup

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2

---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------

1 enet 100001 1500 - - - - - 0 0

20 enet 100020 1500 - - - - - 0 0

30 enet 100030 1500 - - - - - 0 0

1002 fddi 101002 1500 - - - - - 0 0

1003 tr 101003 1500 - - - - - 0 0

1004 fdnet 101004 1500 - - - ieee - 0 0

1005 trnet 101005 1500 - - - ibm - 0 0

Remote SPAN VLANs

------------------------------------------------------------------------------

Primary Secondary Type Ports

------- --------- ----------------- ------------------------------------------

Switch#

Switch#show vlan

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4

Fa0/5, Fa0/6, Fa0/7, Fa0/8

Fa0/9, Fa0/10, Fa0/11, Fa0/12

Fa0/13, Fa0/14, Fa0/15, Fa0/16

Fa0/17, Fa0/18, Fa0/19, Fa0/20

Fa0/21, Fa0/22, Fa0/23, Fa0/24

1002 fddi-default act/unsup

1003 token-ring-default act/unsup

1004 fddinet-default act/unsup

1005 trnet-default act/unsup

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2

---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------

1 enet 100001 1500 - - - - - 0 0

1002 fddi 101002 1500 - - - - - 0 0

1003 tr 101003 1500 - - - - - 0 0

1004 fdnet 101004 1500 - - - ieee - 0 0

1005 trnet 101005 1500 - - - ibm - 0 0

Remote SPAN VLANs

------------------------------------------------------------------------------

Primary Secondary Type Ports

------- --------- ----------------- ------------------------------------------

Switch#show vt

Switch#show vtp s

Switch#show vtp status

VTP Version : 2

Configuration Revision : 0

Maximum VLANs supported locally : 255

Number of existing VLANs : 5

VTP Operating Mode : Client

VTP Domain Name : ahel

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0x0A 0x30 0x15 0x9D 0xA0 0x34 0x2E 0x02

Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00

Switch#

Second Swith i make it Client but no information is passing why i m not undersatnding .

Regards

Brijendra

Seb Rupik · ‎08-24-2017

Hi there,

Your first switch is still int VTP mode client. You need to configure it as the vtp server:

!
vtp mode server
!

You should also take the opportunity to configure a VTP password too, to prevent rogue VTP servers flattening your network.

Once 'Switch' has been made a VTP server, the 'second switch' as a client should update its VTP database.

cheers,

Seb.

brijendrasaini · ‎08-24-2017

Switch One :-

server#show vtp

% Incomplete command.

server#show vtp st

server#show vtp status

VTP Version : 2

Configuration Revision : 2

Maximum VLANs supported locally : 255

Number of existing VLANs : 7

VTP Operating Mode : Server

VTP Domain Name : ahel

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0xBC 0xEB 0x35 0xF3 0xB7 0xC9 0xA7 0x14

Configuration last modified by 192.168.0.1 at 3-1-93 00:29:52

Local updater ID is 192.168.0.1 on interface Vl20 (lowest numbered VLAN interface found)

server#

Swich two :-

Switch>

Switch>en

Switch>enable

Switch#show vt

Switch#show vtp

% Incomplete command.

Switch#show vtp st

Switch#show vtp status

VTP Version : 2

Configuration Revision : 0

Maximum VLANs supported locally : 255

Number of existing VLANs : 5

VTP Operating Mode : Client

VTP Domain Name : ahel

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0x0A 0x30 0x15 0x9D 0xA0 0x34 0x2E 0x02

Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00

Switch#

Seb Rupik · ‎08-24-2017

What is the switchport configuration between the two switches? Is it a trunk link?

Richard Burts · ‎08-24-2017

Brijendra

Can you post the output on both switches of the command

show cdp neighbor detail

HTH

Rick

HTH

Rick

brijendrasaini · ‎08-24-2017

Hi Richard Sir,

Switch>en

Switch>enable

Switch#show

Switch 1

Switch#sho in

Switch#show cdd ne

Switch#show cdp ne

Switch#show cdp neighbors

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone

Device ID Local Intrfce Holdtme Capability Platform Port ID

server Fas 0/1 149 S 2950 Fas 0/1

Switch#

Switch Two

server>en
server>enable
server#con
server#conf
server#configure
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
server(config)#exit
server#
%SYS-5-CONFIG_I: Configured from console by console

server#show in
server#show cdp
server#show cdp n
server#show cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone
Device ID Local Intrfce Holdtme Capability Platform Port ID
Switch Fas 0/1 165 S 2950 Fas 0/1

Richard Burts · ‎08-24-2017

Thank you for the output. What you gave me was output of show cdp neighbor and what I requested was output of show cdp neighbor detail.

HTH

Rick

HTH

Rick

brijendrasaini · ‎08-24-2017

Dear Sir,

Same i perform in Packet tracker it is working now m facingthe issue that is live switch deatils i m pasting below :-

EH_NSK_BSMT_CORE_1#show vtp status
VTP Version capable : 1 to 3
VTP version running : 1
VTP Domain Name : cisco
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 7426.ac25.d300
Configuration last modified by 10.40.139.194 at 0-0-00 00:00:00
Local updater ID is 10.40.139.194 on interface Vl1 (lowest numbered VLAN interface found)

Feature VLAN:
--------------
VTP Operating Mode : Server
Maximum VLANs supported locally : 1005
Number of existing VLANs : 11
Configuration Revision : 0
MD5 digest : 0xC2 0x5C 0xE9 0x36 0x70 0x84 0x94 0xD0
0x20 0xC8 0x8C 0xD2 0x2E 0x33 0x18 0xD2
*** MD5 digest checksum mismatch on trunk: Gi0/8 ***
*** MD5 digest checksum mismatch on trunk: Gi0/24 ***
EH_NSK_BSMT_CORE_1#show vla
EH_NSK_BSMT_CORE_1#show vlan

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi0/10, Gi1/1, Gi1/2, Gi1/3, Gi1/4
10 BIO_EQUIP active
20 SERVER active Gi0/14, Gi0/15, Gi0/16
30 UNUSED active
40 USER_NON_INT active Gi0/9, Gi0/12, Gi0/13, Gi0/20
50 USER_INT active Gi0/11, Gi0/18, Gi0/19
53 DC_NSK active Gi0/17
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
10 enet 100010 1500 - - - - - 0 0
20 enet 100020 1500 - - - - - 0 0
30 enet 100030 1500 - - - - - 0 0
40 enet 100040 1500 - - - - - 0 0
50 enet 100050 1500 - - - - - 0 0
53 enet 100053 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0

Remote SPAN VLANs
------------------------------------------------------------------------------

Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------

Switch Two

EH_NSK_BSMT2_FLR_01#show vt
EH_NSK_BSMT2_FLR_01#show vtp st
EH_NSK_BSMT2_FLR_01#show vtp status
VTP Version capable : 1 to 3
VTP version running : 1
VTP Domain Name : cisco
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 580a.2004.d480
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00

Feature VLAN:
--------------
VTP Operating Mode : Client
Maximum VLANs supported locally : 255
Number of existing VLANs : 10
Configuration Revision : 0
MD5 digest : 0x37 0xAF 0x18 0x85 0xB6 0x9C 0x1B 0xBC
0x65 0xB4 0xF5 0xBA 0x4C 0x9B 0xEA 0xE8
*** MD5 digest checksum mismatch on trunk: Gi1/0/24 ***

brijendrasaini · ‎08-24-2017

Ya sir it is trunk link.

paul driver · ‎08-24-2017

Hello

Are these trunks or L3 interfaces?
Show interface Trunk

NOTE:
They need to be trunks, and if they are and your trunks are up and allowing all vlan tor traverse that trunk, Then I suggest you create an addtional vlan on the server to initate Vlan Memebership Anouncement (VMA) messages and test again.

switch1
conf t

vlan 500
exit <------------ this is important need to type exit for the vlan to applied

res
Paul

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Kind Regards
Paul

Julio E. Moisa · ‎08-24-2017

Hi

You need to enable trunk mode between switches, verify the domain, password and also check the version, you can use these commands:

trunk example:

interface g1/1/1
switchport trunk encapsulation dot1q (new switches have it implicit, so you can omit it)

switchport mode trunk

no shutdown

show interface trunks

show cdp

show vtp status <-- here you will verify the mode, domain, version and revision.

show vtp password (check if you have not left any space at the end of the password)

Everything must match

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