Solved: VTP Server-Client-Trans !!!

Rajdeep Parmar · ‎05-17-2012

Hi All,

Secinario : PC1 -- SW1 -- SW2 -- SW 3 -- PC2

SW1 - Server , SW2- Trans , SW3- Client

Vlan - 10,20 on swithces.

1) I have created SW1 - Server , SW2- Trans , SW3- Client & created Vl 10,20 on SW1 but not updating Vlan on SW3- client Switch. ??? why ?? might be bcoz of SW2 is trans mode !!! it should bcoz SW2 will not update it's own DB but pass that info to other client SW's.

2) What I did , just change the mode on SW2 - trans to Client & working fine.& able to ping Pc1 to PC2 !!!! ???

3) Again , I changed that mode back to Trans mode on SW2. still I can ping Pc1 to PC2 !!!! Bcoz, I can see Vl 10 & 20 in that Vlan DB in trans mode.

4) Now, just removed , Vl 10 , 20 from SW2 - trans mode & not able to ping Pc1 to PC2 !!!!

Can any one please explain briefly on it ??? why it' happening ??

Thanks in advance..

Thanks,

Raj

Thanks & regards, Rajdeep Parmar

glen.grant · ‎05-17-2012

Because you are using Sw2 as a transit vlan between server and client switches. If you delete 10,20 on Sw2 the switch has no way to tag the data from those vlans across the trunks . It thus gets dropped on the floor. The vlan database and what is allowed across the trunks are 2 different things.

You still have to manually create those vlans on Sw 2 if you want traffic to flow between Sw1 and 3 .

View solution in original post

smehrnia · ‎05-17-2012

Raj, as i said earlier u need necessary vlan definitions if applicable (in ur case 10,20) on all ur switches including ur transparent switch, to allow transiting for vlan 10 and 20 on ur SW2 trunks.

Manualy create vlan 10 n 20 on SW2 n there u go.

now rate me LOL.

Soroush.

Hope it Helps!

Soroush.

View solution in original post

smehrnia · ‎05-17-2012

Hi,

Things to Check;

VTP Domain , VTP Password, VTP Version, necessary vlan definitions if applicable (in ur case 10,20).

also check your revision number on SW3 ** < important > ** switch# show vtp status

cheerZ

plz rate if helped,

Soroush.

Hope it Helps!

Soroush.

Rajdeep Parmar · ‎05-17-2012

Hi,

Thanks for reply. Here is the config. Please advice !!! a

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

SW__1__(config)#do sh vt sta

VTP Version : 2

Configuration Revision : 0

Maximum VLANs supported locally : 255

Number of existing VLANs : 7

VTP Operating Mode : Server

VTP Domain Name : ABC

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0xFB 0x53 0x04 0x9F 0xA9 0x96 0xE1 0x60

Configuration last modified by 0.0.0.0 at 3-1-93 00:01:57

SW__2__(config)#do sh vt sta

VTP Version : 2

Configuration Revision : 0

Maximum VLANs supported locally : 255

Number of existing VLANs : 5

VTP Operating Mode : Transparent

VTP Domain Name : ABC

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0xFB 0x53 0x04 0x9F 0xA9 0x96 0xE1 0x60

Configuration last modified by 0.0.0.0 at 3-1-93 00:01:57

SW__2__(config)#

SW__3__(config)#do sh vtp sta

VTP Version : 2

Configuration Revision : 0

Maximum VLANs supported locally : 255

Number of existing VLANs : 7

VTP Operating Mode : Client

VTP Domain Name : ABC

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0xFB 0x53 0x04 0x9F 0xA9 0x96 0xE1 0x60

Configuration last modified by 0.0.0.0 at 3-1-93 00:01:57

SW__3__(config)#

===================================

SW__1__(config)#do sh vl

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, Gig1/1

Gig1/2

10 HR active

20 ACC 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

10 enet 100010 1500 - - - - - 0 0

20 enet 100020 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

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

===============================================================

SW__2__(config)#

SW__2__(config)#do sh vl

VLAN Name Status Ports

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

1 default active 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, Gig1/1, Gig1/2

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

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

====================================================

SW__3__(config)#do sh vl

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, Gig1/1

Gig1/2

10 HR active

20 ACC 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

10 enet 100010 1500 - - - - - 0 0

20 enet 100020 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

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

====================================================

Thanks & regards, Rajdeep Parmar

smehrnia · ‎05-17-2012

Raj, as i said earlier u need necessary vlan definitions if applicable (in ur case 10,20) on all ur switches including ur transparent switch, to allow transiting for vlan 10 and 20 on ur SW2 trunks.

Manualy create vlan 10 n 20 on SW2 n there u go.

now rate me LOL.

Soroush.

Hope it Helps!

Soroush.

Rajdeep Parmar · ‎05-17-2012

Soroushm ...

Done.. ...

Thanks .. see u soon ..

Cheers !!

Thanks & regards, Rajdeep Parmar

glen.grant · ‎05-17-2012

Because you are using Sw2 as a transit vlan between server and client switches. If you delete 10,20 on Sw2 the switch has no way to tag the data from those vlans across the trunks . It thus gets dropped on the floor. The vlan database and what is allowed across the trunks are 2 different things.

You still have to manually create those vlans on Sw 2 if you want traffic to flow between Sw1 and 3 .

Rajdeep Parmar · ‎05-17-2012

Glen.Grant...

Thanks a lot .. ... cheers !!

Thanks & regards, Rajdeep Parmar

Jonathan THOMAS · ‎05-17-2012

Hi,

Try to put VTP version to 2 on all your switchs.

the command if you don't remember : "vtp version 2"

I remember something about switch in transparent mode doesn't forward when they are in version 1

For the ping problem, glen.grant gave the answer