CDP will not be blocked, since it's point-to-point (at least Cisco treats it that way, but it's multicast in reality). I would expect the same to happen to VTP, but logically... it makes sense it behaves this way. VTP information will not be switched, but flooded. Nevertheless, information received on one port will be forwarded on another. In a redundant network, this has an inherent danger of looping. Unless the protocol implements a loop-prevention mechanism, it must rely on underlying infrastructure to take care of that. Since there is no concept of TTL or anything alike in VTP, using STP to prevent VTP loops makes perfect sense.
-- Marko Milivojevic - CCIE #18427 (SP R&S) Senior CCIE Instructor - IPexpert On Fri, Mar 16, 2012 at 06:04, Mills, Derek <[email protected]> wrote: > Marko, > I saw that on one of the outputs from sho int trunk command on SW1 that VLAN > 1 was not on the trunks to SW2. However, I was uncertain if because VLAN 1 is > "special" if it needed to be in STP forwarding state for "control plane" type > VTP packet forwarding. > > Was this the problem? VLAN 1 was not STP forwarding on SW1 trunk links and in > such a scenario even the special traffic will be blocked? Like, is CDP > blocked too? > > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Marko Milivojevic > Sent: Thursday, March 15, 2012 8:31 PM > To: karthk kumar > Cc: [email protected]; GS CCIE > Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 question 9 > > This was such a fun problem to troubleshoot! After a Skype session, we > finally nailed it. Link between SW1 and SW2 was blocked by > spanning-tree on SW1's side. After changing STP, all worked as > expected. > > There is a valuable lesson to be learned here. Many technologies > interact. Understanding those interactions is a very important > aspects. A question Karthik asked me during the session is also a > fantastic one - "why did STP calculation come into play, when I have > not reached that part of the workbook". Well - because switches are > not built for workbooks, but the other-way round. :-) > > Thanks you so much, Karthik for providing me with a late-Thursday > entertainment. I'm now in my CCIE R&S One Week Lab Experience class > and I will give my students this puzzle to solve! > > -- > Marko Milivojevic - CCIE #18427 (SP R&S) > Senior CCIE Instructor - IPexpert > > On Thu, Mar 15, 2012 at 17:42, karthk kumar <[email protected]> wrote: >> Hi Marko, >> >> I changed to ver 1. But, still no luck. Learning of vlans is not occurring >> on sw3 and sw4 clients. Thanks. I will note a point and move on. Let me >> know. >> >> SW1#sh vtp status >> VTP Version : running VTP1 (VTP2 capable) >> >> 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 : 0xB6 0xAA 0xF9 0x6C 0xD2 0xC0 0x68 0x1A >> Configuration last modified by 155.30.7.7 at 3-1-93 04:36:39 >> >> ________________________________ >> From: Marko Milivojevic <[email protected]> >> To: karthk kumar <[email protected]> >> Cc: "Mills, Derek" <[email protected]>; >> "[email protected]" <[email protected]> >> Sent: Thursday, 15 March 2012 5:34 PM >> >> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 question >> 9 >> >> At this point, other than asking you to somehow give me access to the >> switches so I can take a look myself, I have no ideas. >> >> Can you try changing VTP version on SW1? [really, a desperate move] >> >> -- >> Marko Milivojevic - CCIE #18427 (SP R&S) >> Senior CCIE Instructor - IPexpert >> >> On Thu, Mar 15, 2012 at 17:33, karthk kumar <[email protected]> wrote: >>> Hi Marko, >>> >>> I checked. password is not set on all switches. >>> Reload of all switches still hitting same issue. >>> VLANs are not progagated to clients that is my big trouble. >>> I created vlan on server and then watched debug output on sw3 and sw4. >>> They >>> didn't show immediately. Have to wait for a while. >>> >>> Anyways could be bug. Let me know if anything needs tried out. >>> >>> Thanks, >>> >>> Karthik. >>> >>> ________________________________ >>> From: Marko Milivojevic <[email protected]> >>> To: karthk kumar <[email protected]> >>> Cc: "Mills, Derek" <[email protected]>; >>> "[email protected]" <[email protected]> >>> Sent: Thursday, 15 March 2012 5:25 PM >>> >>> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 >>> question >>> 9 >>> >>> Fair enough Could you check them anyway? >>> >>> At this stage, I believe a reload of something is in order ;-) >>> >>> Also - curious. Even though MD5 checksums are different, are the VLANs >>> you create being propagated to clients? >>> >>> The debug you sent above - was it captured when you created new VLAN >>> and exited the database, or did you just enable it and watched the >>> output? >>> >>> -- >>> Marko Milivojevic - CCIE #18427 (SP R&S) >>> Senior CCIE Instructor - IPexpert >>> >>> On Thu, Mar 15, 2012 at 17:11, karthk kumar <[email protected]> >>> wrote: >>>> Hi Marko, >>>> >>>> I haven't enabled any passwords. Here is the debug output from sw4 and >>>> sw3. >>>> Thanks. >>>> >>>> SW4# >>>> SW4# >>>> SW4# >>>> 03:51:51: VTP LOG RUNTIME: Transmit vtp summary, domain CCIE, rev 11, >>>> followers 0, tlv blk size 8 (inc #tlv field), >>>> MD5 digest calculated = E1 92 86 29 E9 A5 D0 CC 6F 89 32 34 21 A0 C4 >>>> 6D >>>> >>>> 03:51:52: VTP LOG RUNTIME: Transmit vtp summary, domain CCIE, rev 11, >>>> followers 0, tlv blk size 8 (inc #tlv field), >>>> MD5 digest calculated = E1 92 86 29 E9 A5 D0 CC 6F 89 32 34 21 A0 C4 >>>> 6D >>>> >>>> SW4# >>>> 03:51:54: VTP LOG RUNTIME: Transmit vtp summary, domain CCIE, rev 11, >>>> followers 0, tlv blk size 8 (inc #tlv field), >>>> MD5 digest calculated = E1 92 86 29 E9 A5 D0 CC 6F 89 32 34 21 A0 C4 >>>> 6D >>>> >>>> SW3# >>>> 04:10:39: VTP LOG RUNTIME: Transmit vtp summary, domain CCIE, rev 11, >>>> followers 0, tlv blk size 8 (inc #tlv field), >>>> MD5 digest calculated = E1 92 86 29 E9 A5 D0 CC 6F 89 32 34 21 A0 C4 >>>> 6D >>>> >>>> SW3# >>>> 04:10:41: VTP LOG RUNTIME: Transmit vtp summary, domain CCIE, rev 11, >>>> followers 0, tlv blk size 8 (inc #tlv field), >>>> MD5 digest calculated = E1 92 86 29 E9 A5 D0 CC 6F 89 32 34 21 A0 C4 >>>> 6D >>>> >>>> SW3# >>>> 04:10:42: VTP LOG RUNTIME: Transmit vtp summary, domain CCIE, rev 11, >>>> followers 0, tlv blk size 8 (inc #tlv field), >>>> MD5 digest calculated = E1 92 86 29 E9 A5 D0 CC 6F 89 32 34 21 A0 C4 >>>> 6D >>>> >>>> ________________________________ >>>> From: Marko Milivojevic <[email protected]> >>>> To: karthk kumar <[email protected]> >>>> Cc: "Mills, Derek" <[email protected]>; >>>> "[email protected]" <[email protected]> >>>> Sent: Thursday, 15 March 2012 4:45 PM >>>> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 >>>> question >>>> 9 >>>> >>>> OK, good. One thing out of the way. SW1 is relaying the message. How >>>> about the same debug on SW3-4? What do you see there? >>>> >>>> Btw. have you checked the passwords on SW2-4? >>>> >>>> -- >>>> Marko Milivojevic - CCIE #18427 (SP R&S) >>>> Senior CCIE Instructor - IPexpert >>>> >>>> On Thu, Mar 15, 2012 at 16:23, karthk kumar <[email protected]> >>>> wrote: >>>>> Hi Marko, >>>>> >>>>> Seeing this msg on sw1 with that debug. I forced them to trunk. But, >>>>> still >>>>> same issue. Please, let me know. >>>>> >>>>> SW1#sh debug >>>>> Generic VLAN Manager: >>>>> vtp events debugging is on >>>>> SW1# >>>>> SW1# >>>>> SW1# >>>>> SW1# >>>>> SW1# >>>>> 03:52:10: VTP LOG RUNTIME: Relaying packet received on trunk Fa0/19 - in >>>>> TRANSPARENT MODE (nc = false) >>>>> >>>>> SW1# >>>>> One thing I noticed is while checking the port config continuous, I see >>>>> pruning cmd. Is it expected to see that?. Pruning is turned off already. >>>>> >>>>> SW1#sh run int f0/13 >>>>> Building configuration... >>>>> >>>>> Current configuration : 107 bytes >>>>> ! >>>>> interface FastEthernet0/13 >>>>> switchport trunk encapsulation dot1q >>>>> switchport mode dynamic desirable >>>>> end >>>>> >>>>> SW1#sh run int f0/13 >>>>> Building configuration... >>>>> >>>>> Current configuration : 145 bytes >>>>> ! >>>>> interface FastEthernet0/13 >>>>> switchport trunk encapsulation dot1q >>>>> switchport trunk pruning vlan 2-1000 >>>>>>>>>>>>>>>>>>> >>>>> switchport mode dynamic desirable >>>>> end >>>>> >>>>> SW1#sh run int f0/13 >>>>> Building configuration... >>>>> >>>>> Current configuration : 107 bytes >>>>> ! >>>>> interface FastEthernet0/13 >>>>> switchport trunk encapsulation dot1q >>>>> switchport mode dynamic desirable >>>>> end >>>>> >>>>> SW1#sh run int f0/13 >>>>> Building configuration... >>>>> >>>>> Current configuration : 107 bytes >>>>> ! >>>>> interface FastEthernet0/13 >>>>> switchport trunk encapsulation dot1q >>>>> switchport mode dynamic desirable >>>>> >>>>> ________________________________ >>>>> From: Marko Milivojevic <[email protected]> >>>>> To: karthk kumar <[email protected]> >>>>> Cc: "Mills, Derek" <[email protected]>; >>>>> "[email protected]" <[email protected]> >>>>> Sent: Thursday, 15 March 2012 3:03 PM >>>>> >>>>> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 >>>>> question >>>>> 9 >>>>> >>>>> I just labbed this up in ProctorLabs with 4 3560s running 12.2(46)SE >>>>> and I have no issues whatsoever. The transparent switch is passing on >>>>> the messages *if* STP was converged when the announcement happens. >>>>> >>>>> One thing that I notice is that your trunks on SW1 are "dynamic >>>>> desirable". Even though this shouldn't have anything to do with it >>>>> since their operational mode is trunking - have you tried actually >>>>> forcing trunks between switches? >>>>> >>>>> One last thing, what output do you get on SW1 when you enable "debug >>>>> sw-vlan vtp events" and create a new VLAN on SW2 and exit from VLAN >>>>> configuration mode? >>>>> >>>>> -- >>>>> Marko Milivojevic - CCIE #18427 (SP R&S) >>>>> Senior CCIE Instructor - IPexpert >>>>> >>>>> On Thu, Mar 15, 2012 at 14:57, karthk kumar <[email protected]> >>>>> wrote: >>>>>> Hi Marko, >>>>>> >>>>>> sh output posted below already for sw1. I am running 3560TS model >>>>>> switches >>>>>> with 12.2(44)SE6. One 3550 EMI running same IOS 12.2(44)SE6. Please, >>>>>> let >>>>>> me >>>>>> know. Thanks. >>>>>> >>>>>> SW1#sh int trunk >>>>>> >>>>>> Port Mode Encapsulation Status Native vlan >>>>>> Fa0/13 desirable 802.1q trunking 1 >>>>>> Fa0/14 desirable 802.1q trunking 1 >>>>>> Fa0/15 desirable 802.1q trunking 1 >>>>>> Fa0/16 desirable 802.1q trunking 1 >>>>>> Fa0/17 desirable 802.1q trunking 1 >>>>>> Fa0/18 desirable 802.1q trunking 1 >>>>>> Fa0/19 desirable 802.1q trunking 1 >>>>>> Fa0/20 desirable 802.1q trunking 1 >>>>>> Fa0/21 desirable 802.1q trunking 1 >>>>>> >>>>>> Port Vlans allowed on trunk >>>>>> Fa0/13 1-4094 >>>>>> Fa0/14 1-4094 >>>>>> Fa0/15 1-4094 >>>>>> Fa0/16 1-4094 >>>>>> Fa0/17 1-4094 >>>>>> Fa0/18 1-4094 >>>>>> Fa0/19 1-4094 >>>>>> Fa0/20 1-4094 >>>>>> Fa0/21 1-4094 >>>>>> >>>>>> Port Vlans allowed and active in management domain >>>>>> Fa0/13 1,7,43,58,67,79,146 >>>>>> Fa0/14 1,7,43,58,67,79,146 >>>>>> Fa0/15 1,7,43,58,67,79,146 >>>>>> Fa0/16 1,7,43,58,67,79,146 >>>>>> Fa0/17 1,7,43,58,67,79,146 >>>>>> Fa0/18 1,7,43,58,67,79,146 >>>>>> Fa0/19 1,7,43,58,67,79,146 >>>>>> Fa0/20 1,7,43,58,67,79,146 >>>>>> Fa0/21 1,7,43,58,67,79,146 >>>>>> >>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>> Fa0/13 7,43,58,67,79,146 >>>>>> Fa0/14 7,43,58,67,79,146 >>>>>> Fa0/15 7,43,58,67,79,146 >>>>>> Fa0/16 7,43,58,67,79,146 >>>>>> Fa0/17 7,43,58,67,79,146 >>>>>> Fa0/18 7,43,58,67,79,146 >>>>>> Fa0/19 1,7,43,58,67,79,146 >>>>>> Fa0/20 none >>>>>> Fa0/21 none >>>>>> SW1#sh vtp status >>>>>> VTP Version : running VTP2 >>>>>> 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 : 0xE9 0x1C 0x40 0xE8 0x44 0xDF 0x6E >>>>>> 0xE4 >>>>>> Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00 >>>>>> SW1# >>>>>> >>>>>> Thanks, >>>>>> >>>>>> Karthik. >>>>>> >>>>>> ________________________________ >>>>>> From: Marko Milivojevic <[email protected]> >>>>>> To: karthk kumar <[email protected]> >>>>>> Cc: "Mills, Derek" <[email protected]>; >>>>>> "[email protected]" <[email protected]> >>>>>> Sent: Thursday, 15 March 2012 2:45 PM >>>>>> >>>>>> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 >>>>>> question >>>>>> 9 >>>>>> >>>>>> Can you please post "show interface trunk" output from SW1? >>>>>> >>>>>> Also, what model of switches and which IOS versions are you running? >>>>>> >>>>>> -- >>>>>> Marko Milivojevic - CCIE #18427 (SP R&S) >>>>>> Senior CCIE Instructor - IPexpert >>>>>> >>>>>> On Thu, Mar 15, 2012 at 14:25, karthk kumar <[email protected]> >>>>>> wrote: >>>>>>> SW1#sh vtp status >>>>>>> VTP Version : running VTP2 >>>>>>> >>>>>>> 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 : 0xE9 0x1C 0x40 0xE8 0x44 0xDF 0x6E >>>>>>> 0xE4 >>>>>>> Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00 >>>>>>> >>>>>>> Thanks, >>>>>>> >>>>>>> Karthik. >>>>>>> >>>>>>> ________________________________ >>>>>>> From: karthk kumar <[email protected]> >>>>>>> To: Marko Milivojevic <[email protected]>; "Mills, Derek" >>>>>>> <[email protected]> >>>>>>> Cc: "[email protected]" <[email protected]> >>>>>>> Sent: Thursday, 15 March 2012 2:20 PM >>>>>>> >>>>>>> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 >>>>>>> question >>>>>>> 9 >>>>>>> >>>>>>> Hi, >>>>>>> >>>>>>> Here is the topology. Pls let me know if missing anything. Thanks. >>>>>>> >>>>>>> sw1 (f0/13-15) -- trunk - sw2(f0/13-15) >>>>>>> sw1 (f0/16-18) -- trunk - sw3 (f0/13-15) >>>>>>> sw1 (f0/19-21) -- trunk - sw4 (f13-15) >>>>>>> >>>>>>> sw2 is server >>>>>>> sw3 and sw4 are clients >>>>>>> sw1 made vtp mode transparent >>>>>>> >>>>>>> 1. create vlan X on sw2 >>>>>>> 2. it should go to sw1 (transparent) not learn but fwd them to sw3 and >>>>>>> sw4 >>>>>>> >>>>>>> Issue: >>>>>>> sw3 and sw4 are not learning vlan X. >>>>>>> >>>>>>> Trunks are formed. Domain name is matched. Enabled debugs but clients >>>>>>> are >>>>>>> not updating vtp database from server. >>>>>>> >>>>>>> Outputs: >>>>>>> >>>>>>> sw2 server >>>>>>> SW2#sh vtp status >>>>>>> VTP Version : running VTP2 >>>>>>> Configuration Revision : 9 >>>>>>> Maximum VLANs supported locally : 1005 >>>>>>> Number of existing VLANs : 22 >>>>>>> VTP Operating Mode : Server >>>>>>> VTP Domain Name : CCIE >>>>>>> VTP Pruning Mode : Disabled >>>>>>> VTP V2 Mode : Enabled >>>>>>> VTP Traps Generation : Disabled >>>>>>> MD5 digest : 0x15 0x4D 0x3A 0xF8 0xC5 0x96 0x09 >>>>>>> 0x49 >>>>>>> Configuration last modified by 155.30.8.8 at 3-2-93 18:38:03 >>>>>>> Local updater ID is 155.30.8.8 on interface Vl8 (lowest numbered VLAN >>>>>>> interface found) >>>>>>> SW2# >>>>>>> SW2# >>>>>>> SW2#sh int f0/13 tru >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/13 auto 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/13 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/13 1,5,7-10,22,43,58,67,79,124-129,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/13 1,5,7-10,22,43,58,67,79,124-129,146 >>>>>>> SW2#sh int f0/14 tru >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/14 auto 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/14 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/14 1,5,7-10,22,43,58,67,79,124-129,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/14 1,5,8-10,22,124-129 >>>>>>> >>>>>>> SW2#sh int f0/15 tru >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/15 auto 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/15 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/15 1,5,7-10,22,43,58,67,79,124-129,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/15 1,5,8-10,22,124-129 >>>>>>> SW2# >>>>>>> ====== >>>>>>> SW1#sh int trunk >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/13 desirable 802.1q trunking 1 >>>>>>> Fa0/14 desirable 802.1q trunking 1 >>>>>>> Fa0/15 desirable 802.1q trunking 1 >>>>>>> Fa0/16 desirable 802.1q trunking 1 >>>>>>> Fa0/17 desirable 802.1q trunking 1 >>>>>>> Fa0/18 desirable 802.1q trunking 1 >>>>>>> Fa0/19 desirable 802.1q trunking 1 >>>>>>> Fa0/20 desirable 802.1q trunking 1 >>>>>>> Fa0/21 desirable 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/13 1-4094 >>>>>>> Fa0/14 1-4094 >>>>>>> Fa0/15 1-4094 >>>>>>> Fa0/16 1-4094 >>>>>>> Fa0/17 1-4094 >>>>>>> Fa0/18 1-4094 >>>>>>> Fa0/19 1-4094 >>>>>>> Fa0/20 1-4094 >>>>>>> Fa0/21 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/13 1,7,43,58,67,79,146 >>>>>>> Fa0/14 1,7,43,58,67,79,146 >>>>>>> Fa0/15 1,7,43,58,67,79,146 >>>>>>> Fa0/16 1,7,43,58,67,79,146 >>>>>>> Fa0/17 1,7,43,58,67,79,146 >>>>>>> Fa0/18 1,7,43,58,67,79,146 >>>>>>> Fa0/19 1,7,43,58,67,79,146 >>>>>>> Fa0/20 1,7,43,58,67,79,146 >>>>>>> Fa0/21 1,7,43,58,67,79,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/13 7,43,58,67,79,146 >>>>>>> Fa0/14 7,43,58,67,79,146 >>>>>>> Fa0/15 7,43,58,67,79,146 >>>>>>> Fa0/16 7,43,58,67,79,146 >>>>>>> Fa0/17 7,43,58,67,79,146 >>>>>>> Fa0/18 7,43,58,67,79,146 >>>>>>> Fa0/19 1,7,43,58,67,79,146 >>>>>>> Fa0/20 none >>>>>>> Fa0/21 none >>>>>>> SW1# >>>>>>> ====== >>>>>>> SW3#sh vtp status >>>>>>> VTP Version : running VTP2 >>>>>>> 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 >>>>>>> SW3# >>>>>>> SW3#sh int f0/13 tru >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/13 auto 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/13 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/13 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/13 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> SW3#sh int f0/14 tru >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/14 auto 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/14 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/14 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/14 1,5,8-10,22,124-125 >>>>>>> SW3#sh int f0/15 tru >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/15 auto 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/15 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/15 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/15 1,5,8-10,22,124-125 >>>>>>> ====== >>>>>>> W4#sh vtp status >>>>>>> VTP Version : running VTP2 >>>>>>> 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 >>>>>>> SW4# >>>>>>> SW4#sh int f0/13 tru >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/13 auto 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/13 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/13 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/13 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> SW4#sh int f0/14 tru >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/14 auto 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/14 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/14 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/14 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> SW4#sh int f0/15 tru >>>>>>> >>>>>>> Port Mode Encapsulation Status Native vlan >>>>>>> Fa0/15 auto 802.1q trunking 1 >>>>>>> >>>>>>> Port Vlans allowed on trunk >>>>>>> Fa0/15 1-4094 >>>>>>> >>>>>>> Port Vlans allowed and active in management domain >>>>>>> Fa0/15 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> >>>>>>> Port Vlans in spanning tree forwarding state and not pruned >>>>>>> Fa0/15 1,5,7-10,22,43,58,67,79,124-125,146 >>>>>>> ________________________________ >>>>>>> From: Marko Milivojevic <[email protected]> >>>>>>> To: "Mills, Derek" <[email protected]> >>>>>>> Cc: karthk kumar <[email protected]>; >>>>>>> "[email protected]" >>>>>>> <[email protected]> >>>>>>> Sent: Thursday, 15 March 2012 1:57 PM >>>>>>> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 >>>>>>> question >>>>>>> 9 >>>>>>> >>>>>>> The topology diagram would also be of some value at this point. >>>>>>> >>>>>>> My guess is that you have mismatched domains. >>>>>>> >>>>>>> -- >>>>>>> Marko Milivojevic - CCIE #18427 (SP R&S) >>>>>>> Senior CCIE Instructor - IPexpert >>>>>>> >>>>>>> On Thu, Mar 15, 2012 at 13:52, Mills, Derek >>>>>>> <[email protected]> wrote: >>>>>>>> How about showing us "SHOW VTP STATUS" on the server switch and then >>>>>>>> the >>>>>>>> client switch, together in a response. >>>>>>>> >>>>>>>> >>>>>>>> DEREK >>>>>>>> >>>>>>>> -----Original Message----- >>>>>>>> From: [email protected] >>>>>>>> [mailto:[email protected]] On Behalf Of karthk >>>>>>>> kumar >>>>>>>> Sent: Thursday, March 15, 2012 1:57 PM >>>>>>>> To: Marko Milivojevic >>>>>>>> Cc: [email protected] >>>>>>>> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 >>>>>>>> question 9 >>>>>>>> >>>>>>>> Hi Marko, >>>>>>>> >>>>>>>> It is expected behavior for sw1 which is transparent mode. But for >>>>>>>> other >>>>>>>> switches that are client mode sw3 and sw4, I must see the vlan that >>>>>>>> was >>>>>>>> added on sw2 server mode right?. That is not happening now. >>>>>>>> >>>>>>>> >>>>>>>> Thanks, >>>>>>>> >>>>>>>> Karthik. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> ________________________________ >>>>>>>> From: Marko Milivojevic <[email protected]> >>>>>>>> To: karthk kumar <[email protected]> >>>>>>>> Cc: Zak Dandashi <[email protected]>; >>>>>>>> "[email protected]" >>>>>>>> <[email protected]> >>>>>>>> Sent: Thursday, 15 March 2012 11:53 AM >>>>>>>> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 >>>>>>>> question 9 >>>>>>>> >>>>>>>> MD5 checksum is the checksum over the VTP database. Transparent VTP >>>>>>>> will not be updated by the server-made changes - that's the whole >>>>>>>> point of the transparent VTP. Behavior you are observing is an >>>>>>>> expected one. >>>>>>>> >>>>>>>> -- >>>>>>>> Marko Milivojevic - CCIE #18427 (SP R&S) >>>>>>>> Senior CCIE Instructor - IPexpert >>>>>>>> >>>>>>>> On Thu, Mar 15, 2012 at 10:48, karthk kumar <[email protected]> >>>>>>>> wrote: >>>>>>>>> Hi, >>>>>>>>> >>>>>>>>> I have vtp version running as 2. Even though I enabled it globally I >>>>>>>>> am >>>>>>>>> still facing issue. >>>>>>>>> >>>>>>>>> To explain clearly. >>>>>>>>> >>>>>>>>> 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 doesnt 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)# >>>>>>>>> >>>>>>>>> >>>>>>>>> Thanks, >>>>>>>>> >>>>>>>>> Karthik. >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> ________________________________ >>>>>>>>> From: Zak Dandashi <[email protected]> >>>>>>>>> To: karthk kumar <[email protected]> >>>>>>>>> Cc: "[email protected]" <[email protected]> >>>>>>>>> Sent: Wednesday, 14 March 2012 10:56 PM >>>>>>>>> Subject: Re: [OSL | CCIE_RS] VTP mode transparent changed md5 vol 1 >>>>>>>>> question 9 >>>>>>>>> >>>>>>>>> >>>>>>>>> Kumar, >>>>>>>>> >>>>>>>>> try to enable vtp v2 as it is disabled. >>>>>>>>> >>>>>>>>> VTP Version reflects the capabilities of the device/code >>>>>>>>> revision; VTP >>>>>>>>> V2 >>>>>>>>> Mode reflects the vtp version it is currently configured to >>>>>>>>> operate in. >>>>>>>>> >>>>>>>>> Your output shows a device that is capable of running Version 2, but >>>>>>>>> is >>>>>>>>> running Version 1 currently, you can move it into version 2 by >>>>>>>>> entering >>>>>>>>> the >>>>>>>>> "vtp version 2" command in global configuration mode. >>>>>>>>> >>>>>>>>> >>>>>>>>> regards, >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> On Thu, Mar 15, 2012 at 8:30 AM, karthk kumar >>>>>>>>> <[email protected]> >>>>>>>>> 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. >>>>>>>>>>_______________________________________________ >>>>>>>>>>For more information regarding industry leading CCIE Lab training, >>>>>>>>>> please >>>>>>>>>> visit www.ipexpert.com >>>>>>>>>> >>>>>>>>>>Are you a CCNP or CCIE and looking for a job? Check out >>>>>>>>>> www.PlatinumPlacement.com >>>>>>>>>> >>>>>>>>>>http://onlinestudylist.com/mailman/listinfo/ccie_rs >>>>>>>>>> >>>>>>>>> _______________________________________________ >>>>>>>>> For more information regarding industry leading CCIE Lab training, >>>>>>>>> please >>>>>>>>> visit www.ipexpert.com >>>>>>>>> >>>>>>>>> Are you a CCNP or CCIE and looking for a job? Check out >>>>>>>>> www.PlatinumPlacement.com >>>>>>>>> >>>>>>>>> http://onlinestudylist.com/mailman/listinfo/ccie_rs >>>>>>>> _______________________________________________ >>>>>>>> For more information regarding industry leading CCIE Lab training, >>>>>>>> please >>>>>>>> visit www.ipexpert.com >>>>>>>> >>>>>>>> Are you a CCNP or CCIE and looking for a job? Check out >>>>>>>> www.PlatinumPlacement.com >>>>>>>> >>>>>>>> http://onlinestudylist.com/mailman/listinfo/ccie_rs >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- >>>>>>>> Anheuser-Busch InBev Email Disclaimer www.ab-inbev.com >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
