RE: VTP transparent mode md5 gets changed

You said, " But, I don't see that happening when sw1 is in transparent
mode."

You won't ever see a transparent switch auto-learn vlans. Never ever.

I do believe that it will passive pass vtp advertisements from server to
client though. BUT, I'm quite positive that itself will never learn those
vlans in it's db

Aaron

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
karthik thatikonda
Sent: Thursday, March 15, 2012 12:51 PM
To: Cisco certification
Subject: Re: VTP transparent mode md5 gets changed

To explain clearly.

trunks are configured between sw1 to sw2, sw3 and sw4.

sw1 is in transparent mode

sw2 is in server mode

sw3 and sw4 are in client mode

Once I changed sw1 to transparent md5 on sw1 doesn't match to that on sw2.

Also, since sw2 is server mode, when I created a vlan it supposed to
propagate to other switches in client mode that is sw3 and sw4. But, I don't
see that happening when sw1 is in transparent mode.

SW1#sh vtp status

VTP Version : 2

Configuration Revision : 0

Maximum VLANs supported locally : 1005

Number of existing VLANs : 11

VTP Operating Mode : Transparent

VTP Domain Name : CCIE

VTP Pruning Mode : Disabled

VTP V2 Mode : Enabled

VTP Traps Generation : Disabled

MD5 digest : 0xC4 0x17 0x67 0xE6 0xB0 0x6D 0xF0 0x38

Configuration last modified by 155.30.37.7 at 3-2-93 18:09:58 SW1# SW1#sh
vlan id 126 VLAN id 126 not found in current VLAN database SW1#conf t Enter
configuration commands, one per line. End with CNTL/Z.

SW1(config)#vtp vers

SW1(config)#vtp version 2

VTP mode already in V2.

SW1(config)#

===

SW2(config)#vl 126

SW2(config-vlan)#

SW2#

SW2#

SW2#

SW2#

SW2#

1d18h: %SYS-5-CONFIG_I: Configured from console by console SW2#sh vl id 126

VLAN Name Status Ports

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

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

126 VLAN0126 active Fa0/13, Fa0/14, Fa0/15

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1

Trans2

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

------

126 enet 100126 1500 - - - - - 0 0

Remote SPAN VLAN

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

Disabled

Primary Secondary Type Ports

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

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

SW2#

SW2#sh vtp status

VTP Version : 2

Configuration Revision : 6

Maximum VLANs supported locally : 1005

Number of existing VLANs : 19

VTP Operating Mode : Server

VTP Domain Name : CCIE

VTP Pruning Mode : Disabled

VTP V2 Mode : Enabled

VTP Traps Generation : Disabled

MD5 digest : 0xA0 0x68 0x07 0x2C 0xB9 0xF2 0xFA 0x6B

Configuration last modified by 155.30.8.8 at 3-2-93 18:12:06 Local updater
ID is 155.30.8.8 on interface Vl8 (lowest numbered VLAN interface found)
SW2# SW2# SW2#

====

SW4# sh vl | i ^126

SW4#sh vl id 126

VLAN id 126 not found in current VLAN database SW4#sh vtp status

VTP Version : 2

Configuration Revision : 5

Maximum VLANs supported locally : 1005

Number of existing VLANs : 18

VTP Operating Mode : Client

VTP Domain Name : CCIE

VTP Pruning Mode : Disabled

VTP V2 Mode : Enabled

VTP Traps Generation : Disabled

MD5 digest : 0xF5 0xDB 0xB5 0xDC 0x36 0xF8 0xF3 0x30

Configuration last modified by 155.30.8.8 at 3-2-93 18:09:58

Thanks,

Karthik.

On Wed, Mar 14, 2012 at 10:31 PM, karthik thatikonda

< <mailto:get2explore_at_gmail.com> get2explore_at_gmail.com>wrote:

> Hi,

>

> When configuring sw2 as transparent mode, seeing that md5 is not

> matched on the switches and any creation of vlan on sw1 i.e. server is

> not propagation vtp updates to sw3 and sw4. If I change sw2 to client,

> md5 shows correct on all switches and sw3 and sw4 learn vlan created

> on sw2 (server). Am I missing anything?. Please, let me know.

>

> SW2#sh vtp status

> VTP Version : 2

> Configuration Revision : 4

> Maximum VLANs supported locally : 1005

> Number of existing VLANs : 18

> VTP Operating Mode : Server >>>>>>>>>>>>>>>>>>>>>>>

> VTP Domain Name : CCIE

> VTP Pruning Mode : Disabled

> VTP V2 Mode : Disabled

> VTP Traps Generation : Disabled

> MD5 digest : 0x3C 0xAF 0xD7 0xFB 0xB5 0x11 0xB4 0x4B

> >>>>>>>>>>>>>>>>>>

> Configuration last modified by 155.30.8.8 at 3-2-93 05:38:01 Local

> updater ID is 155.30.8.8 on interface Vl8 (lowest numbered VLAN

> interface found) SW2# SW2#

>

>

>

> SW1#sh vtp status

> VTP Version : 2

> Configuration Revision : 0

> Maximum VLANs supported locally : 1005

> Number of existing VLANs : 11

> VTP Operating Mode : Transparent
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

> VTP Domain Name : CCIE

> VTP Pruning Mode : Disabled

> VTP V2 Mode : Disabled

> VTP Traps Generation : Disabled

> MD5 digest : 0x9B 0x27 0x73 0x7F 0xB4 0xB1 0xD3 0x29

> ==========>>>>>>>

> Configuration last modified by 155.30.37.7 at 3-2-93 03:10:45

> SW1#conf t

> Enter configuration commands, one per line. End with CNTL/Z.

> SW1(config)#vtp mod clie

> Setting device to VTP CLIENT mode.

> SW1(config)#

>

> +++++

>

> AFter changing to client. md5 matches

>

> +++++

>

>

> SW1#sh vtp status

> VTP Version : 2

> Configuration Revision : 4

> Maximum VLANs supported locally : 1005

> Number of existing VLANs : 18

> VTP Operating Mode : Client

> VTP Domain Name : CCIE

> VTP Pruning Mode : Disabled

> VTP V2 Mode : Disabled

> VTP Traps Generation : Disabled

> MD5 digest : 0x3C 0xAF 0xD7 0xFB 0xB5 0x11 0xB4 0x4B

> Configuration last modified by 155.30.8.8 at 3-2-93 05:38:01

> Thanks,

>

> Karthik.

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Received on Thu Mar 15 2012 - 14:41:24 ART