Re: VTP transparent mode md5 gets changed

Sounds about right

-- 
Paul Negron
CCIE# 14856 CCSI# 22752
Senior Technical Instructor
> From: Aaron <aaron1_at_gvtc.com>
> Reply-To: Aaron <aaron1_at_gvtc.com>
> Date: Thu, 15 Mar 2012 14:41:24 -0500
> To: 'karthik thatikonda' <get2explore_at_gmail.com>, 'Cisco certification'
> <ccielab_at_groupstudy.com>
> Subject: 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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