From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Fri Jun 08 2007 - 19:26:04 ART
Victor,
This is the problem he is referring to:
http://www.groupstudy.com/archives/ccielab/200701/msg01364.html
It doesn't relate to VTP pruning on a switch that is in VTP transparent
mode. The problem is in regards to a switch in transparent mode between a
server and client with VTP pruning enabled.
--Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP) bdennis@internetworkexpert.com Internetwork Expert, Inc. http://www.InternetworkExpert.com Toll Free: 877-224-8987 Direct: 775-745-6404 (Outside the US and Canada)
On 6/8/07 3:02 PM, "Victor Cappuccio" <victor@ccbootcamp.com> wrote:
> Hi Michael, > > Can you elaborate a little bit more please this? > I have configured the following > > > Sw2#show vtp status > VTP Version : 2 > Configuration Revision : 0 > Maximum VLANs supported locally : 1005 > Number of existing VLANs : 6 > VTP Operating Mode : Transparent > VTP Domain Name : cisco > VTP Pruning Mode : Disabled > VTP V2 Mode : Disabled > VTP Traps Generation : Disabled > MD5 digest : 0xBE 0xF6 0xE5 0xB3 0x96 0x2C 0x86 0xEB > Configuration last modified by 10.10.8.8 at 3-3-93 05:27:43 > Sw2# > rack5>7 > [Resuming connection 7 to sw1 ... ] > > Sw1(config)#do show vtp status > VTP Version : 2 > Configuration Revision : 0 > Maximum VLANs supported locally : 1005 > Number of existing VLANs : 14 > VTP Operating Mode : Server > VTP Domain Name : cisco > VTP Pruning Mode : Disabled > VTP V2 Mode : Disabled > VTP Traps Generation : Disabled > MD5 digest : 0x26 0x18 0xF2 0x00 0xB5 0x36 0xA4 0x7A > Configuration last modified by 10.10.34.7 at 3-1-93 22:16:15 > Local updater ID is 10.10.34.2 on interface Vl200 (lowest numbered VLAN > interface found) > Sw1(config)#vtp prun > Pruning switched on > Sw1(config)#do show vtp status > VTP Version : 2 > Configuration Revision : 1 > Maximum VLANs supported locally : 1005 > Number of existing VLANs : 14 > VTP Operating Mode : Server > VTP Domain Name : cisco > VTP Pruning Mode : Enabled > VTP V2 Mode : Disabled > VTP Traps Generation : Disabled > MD5 digest : 0xF4 0xF8 0x17 0x2E 0xCA 0x4D 0x80 0x9B > Configuration last modified by 10.10.34.2 at 3-2-93 16:01:24 > Local updater ID is 10.10.34.2 on interface Vl200 (lowest numbered VLAN > interface found) > > So I enabled pruning and lets see what the sw2 has > > Sw1(config)# > rack5>8 > [Resuming connection 8 to sw2 ... ] > > 3d21h: VTP LOG RUNTIME: Relaying packet received on trunk Fa0/19 - in > TRANSPARENT MODE (nc = false) > > 3d21h: VTP LOG RUNTIME: Relaying packet received on trunk Fa0/19 - > Sw2#do sho > 3d21h: VTP LOG RUNTIME: Relaying packet received on trunk Fa0/20 - in > TRANSPARENT MODE (nc = false) > > 3d21h: VTP LOG RUNTIME: Relaying packet received on trunk Fa0/19 - in > TRANSPARENT MODE (nc = false) > > Sw2#show vtp stat > VTP Version : 2 > Configuration Revision : 0 > Maximum VLANs supported locally : 1005 > Number of existing VLANs : 6 > VTP Operating Mode : Transparent > VTP Domain Name : cisco > VTP Pruning Mode : Disabled > VTP V2 Mode : Disabled > VTP Traps Generation : Disabled > MD5 digest : 0xBE 0xF6 0xE5 0xB3 0x96 0x2C 0x86 0xEB > Configuration last modified by 10.10.8.8 at 3-3-93 05:27:43 > Sw2 > > > VTP Prunning is disabled yet! > > By > http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.1/11/configurati > on/guide/vtp.html#wp1020402 > > TransparentVTP transparent network devices do not participate in VTP. A VTP > transparent network device does not advertise its VLAN configuration and does > not synchronize its VLAN configuration based on received advertisements. > However, in VTP version 2, transparent network devices do forward VTP > advertisements that they receive on their trunking LAN interfaces. > > anyways if > > Sw2(config)#vtp mode client > Setting device to VTP CLIENT mode. > Sw2(config)# > 3d21h: VTP LOG RUNTIME: Transmit vtp request, domain cisco, start value 0 > > 3d21h: VTP LOG RUNTIME: Transmit vtp request, domain cisco, start value 0 > > 3d21h: VTP LOG RUNTIME: Summary packet received, domain = cisco, rev = 1, > followers = 1, length 77, trunk Fa0/20 > > 3d21h: > 3d21h: summary: 01 01 01 05 63 69 73 63 6F 00 00 00 00 00 00 00 > ....cisco....... > 3d21h: summary: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ................ > 3d21h: summary: 00 00 00 00 00 00 00 01 0A 0A 22 02 39 33 30 3 > Sw2(config)#3 ..........".9303 > 3d21h: summary: 30 32 31 36 30 31 32 34 F4 F8 17 2E CA 4D 80 9B > 02160124tx..JM.. > 3d21h: summary: 1C 17 F9 82 4A 36 7D 89 01 01 01 02 00 > ..y.J6}...... > 3d21h: > 3d21h: VTP LOG RUNTIME: Summary packet rev 1 greater than domain cisco rev 0 > > 3d21h: VTP LOG RUNTIME: Domain cisco currently not in updating state > > 3d21h: VTP LOG RUNTIME: pdu len 77, #tlvs 1 > > 3d21h: VTP LOG RUNTIME: Subset packet received, domain = cisco, rev = 1, seq = > 1, length = 384 > > 3d21h: > 3d21h: > Sw2(config)# subset: 01 02 01 05 63 69 73 63 6F 00 00 00 00 00 00 00 > ....cisco....... > 3d21h: subset: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ................ > 3d21h: subset: 00 00 00 00 00 00 00 01 14 00 01 07 00 01 05 DC > ...............\ > 3d21h: subset: 00 01 86 A1 64 65 66 61 75 6C 74 00 14 00 01 08 > ...!default..... > 3d21h: subset: 00 0C 05 DC 00 01 86 AC 56 4C 41 4E 30 30 31 32 > ...\...,VLAN0012 > 3d21h: subset: 14 00 01 08 00 0D 05 DC 00 01 86 AD 56 4C 41 4E > .......\...-VLAN > 3d21h: subset: 30 3 > Sw2(config)#0 31 33 14 00 01 08 00 1E 05 DC 00 01 86 BE 0013.......\...> > 3d21h: subset: 56 4C 41 4E 5F 42 42 31 14 00 01 08 00 28 05 DC > VLAN_BB1.....(.\ > 3d21h: subset: 00 01 86 C8 56 4C 41 4E 5F 42 42 32 14 00 01 07 > ...HVLAN_BB2.... > 3d21h: subset: 00 37 05 DC 00 01 86 D7 56 4C 41 4E 5F 35 35 00 > .7.\...WVLAN_55. > 3d21h: subset: 14 00 01 08 00 3C 05 DC 00 01 86 DC 56 4C 41 4E > .....<.\...\VLAN > 3d21h: subset: 5F 42 42 33 14 00 01 06 00 64 05 DC 00 01 87 04 > _BB3.....d.\.... > 3d21h: subset: 56 4C 41 4E 5F 42 > Sw2(config)# 00 00 14 00 01 06 00 C8 05 DC VLAN_B.......H.\ > 3d21h: subset: 00 01 87 68 56 4C 41 4E 5F 43 00 00 14 00 01 08 > ...hVLAN_C...... > 3d21h: subset: 00 C9 05 DC 00 01 87 69 56 4C 41 4E 30 32 30 31 > .I.\...iVLAN0201 > 3d21h: subset: 20 00 02 0C 03 EA 05 DC 00 01 8A 8A 66 64 64 69 > ....j.\....fddi > 3d21h: subset: 2D 64 65 66 61 75 6C 74 01 01 00 00 04 01 00 00 > -default........ > 3d21h: subset: 28 00 03 12 03 EB 05 DC 00 01 8A 8B 74 6F 6B 65 > (....k.\....toke > 3d21h: subset: 6E 2D 72 69 6E 67 2D 64 65 66 > Sw2(config)#61 75 6C 74 00 00 n-ring-default.. > 3d21h: subset: 01 01 00 00 04 01 00 00 24 00 04 0F 03 EC 05 DC > ........$....l.\ > 3d21h: subset: 00 01 8A 8C 66 64 64 69 6E 65 74 2D 64 65 66 61 > ....fddinet-defa > 3d21h: subset: 75 6C 74 00 02 01 00 00 03 01 00 01 24 00 05 0D > ult.........$... > 3d21h: subset: 03 ED 05 DC 00 01 8A 8D 74 72 6E 65 74 2D 64 65 > .m.\....trnet-de > 3d21h: subset: 66 61 75 6C 74 00 00 00 02 01 00 00 03 01 00 02 > fault........... > 3d21h: > 3d21h: VTP LOG RUNTIME: Transmit vtp summary, dom > Sw2(config)#ain cisco, rev 1, followers 1, tlv blk size 5 (inc #tlv field), > MD5 digest calculated = F4 F8 17 2E CA 4D 80 9B 1C 17 F9 82 4A 36 7D 89 > > 3d21h: VTP LOG RUNTIME: Transmit vtp summary, domain cisco, rev 1, followers > 1, tlv blk size 5 (inc #tlv field), > MD5 digest calculated = F4 F8 17 2E CA 4D 80 9B 1C 17 F9 82 4A 36 7D 89 > > 3d21h: VTP LOG RUNTIME: Transmit vtp request, domain cisco, start value 0 > > 3d21h: VTP LOG RUNTIME: Summary packet received, domain = cisco, rev = 1, > followers = 1, length 77, > Sw2(config)#do show trunk Fa0/19 > > 3d21h: > 3d21h: summary: 01 01 01 05 63 69 73 63 6F 00 00 00 00 00 00 00 > ....cisco....... > 3d21h: summary: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ................ > 3d21h: summary: 00 00 00 00 00 00 00 01 0A 0A 22 02 39 33 30 33 > ..........".9303 > 3d21h: summary: 30 32 31 36 30 31 32 34 F4 F8 17 2E CA 4D 80 9B > 02160124tx..JM.. > 3d21h: summary: 1C 17 F9 82 4A 36 7D 89 01 01 01 02 00 > ..y.J6}...... > 3d21h: > 3d21h: VTP LOG RUNTIME: Summary packet rev 1 equal to do > Sw2(config)#do show main cisco rev 1 > > 3d21h: VTP LOG RUNTIME: Subset packet received, domain = cisco, rev = 1, seq = > 1, length = 384 > > 3d21h: > 3d21h: subset: 01 02 01 05 63 69 73 63 6F 00 00 00 00 00 00 00 > ....cisco....... > 3d21h: subset: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ................ > 3d21h: subset: 00 00 00 00 00 00 00 01 14 00 01 07 00 01 05 DC > ...............\ > 3d21h: subset: 00 01 86 A1 64 65 66 61 75 6C 74 00 14 00 01 08 > ...!default..... > 3d21h: subset: 00 0C 05 DC 00 01 86 AC 56 4C 41 4E 3 > Sw2(config)#do show 0 30 31 32 ...\...,VLAN0012 > 3d21h: subset: 14 00 01 08 00 0D 05 DC 00 01 86 AD 56 4C 41 4E > .......\...-VLAN > 3d21h: subset: 30 30 31 33 14 00 01 08 00 1E 05 DC 00 01 86 BE > 0013.......\...> > 3d21h: subset: 56 4C 41 4E 5F 42 42 31 14 00 01 08 00 28 05 DC > VLAN_BB1.....(.\ > 3d21h: subset: 00 01 86 C8 56 4C 41 4E 5F 42 42 32 14 00 01 07 > ...HVLAN_BB2.... > 3d21h: subset: 00 37 05 DC 00 01 86 D7 56 4C 41 4E 5F 35 35 00 > .7.\...WVLAN_55. > 3d21h: subset: 14 00 01 08 00 3C 05 DC 00 01 86 DC 56 4C 41 4E > Sw2(config)#do show vtp .....<.\...\VLAN > 3d21h: subset: 5F 42 42 33 14 00 01 06 00 64 05 DC 00 01 87 04 > _BB3.....d.\.... > 3d21h: subset: 56 4C 41 4E 5F 42 00 00 14 00 01 06 00 C8 05 DC > VLAN_B.......H.\ > 3d21h: subset: 00 01 87 68 56 4C 41 4E 5F 43 00 00 14 00 01 08 > ...hVLAN_C...... > 3d21h: subset: 00 C9 05 DC 00 01 87 69 56 4C 41 4E 30 32 30 31 > .I.\...iVLAN0201 > 3d21h: subset: 20 00 02 0C 03 EA 05 DC 00 01 8A 8A 66 64 64 69 > ....j.\....fddi > 3d21h: subset: 2D 64 65 66 61 75 6C 74 01 01 00 00 04 01 00 00 > -default..... > Sw2(config)#do show vtp ... > 3d21h: subset: 28 00 03 12 03 EB 05 DC 00 01 8A 8B 74 6F 6B 65 > (....k.\....toke > 3d21h: subset: 6E 2D 72 69 6E 67 2D 64 65 66 61 75 6C 74 00 00 > n-ring-default.. > 3d21h: subset: 01 01 00 00 04 01 00 00 24 00 04 0F 03 EC 05 DC > ........$....l.\ > 3d21h: subset: 00 01 8A 8C 66 64 64 69 6E 65 74 2D 64 65 66 61 > ....fddinet-defa > 3d21h: subset: 75 6C 74 00 02 01 00 00 03 01 00 01 24 00 05 0D > ult.........$... > 3d21h: subset: 03 ED 05 DC 00 01 8A 8D 74 72 6E 65 74 2D 64 65 > .m.\....trnet-de > 3d21h: s > Sw2(config)#do show vtp status > VTP Version : 2 > Configuration Revision : 1 > Maximum VLANs supported locally : 1005 > Number of existing VLANs : 14 > VTP Operating Mode : Client > VTP Domain Name : cisco > VTP Pruning Mode : Enabled > VTP V2 Mode : Disabled > VTP Traps Generation : Disabled > MD5 digest : 0xF4 0xF8 0x17 0x2E 0xCA 0x4D 0x80 0x9B > Configuration last modified by 10.10.34.2 at 3-2-93 16:01:24 > Sw2(confubset: 66 61 75 6C 74 00 00 00 02 01 00 00 03 01 00 02 > fault......ig)#..... > 3d21h: > > So in order to work in a network with vtp mode in transparent make no sense to > enable or disable vtp prunning.. > it make more sence to enable it on a Server to client relationship > > Anyways the Switch in VTP in transparent mode, should be configured with the > necesary vlans. > > so for example > Sw2(config-if)#do show vtp status > VTP Version : 2 > Configuration Revision : 0 > Maximum VLANs supported locally : 1005 > Number of existing VLANs : 17 > VTP Operating Mode : Transparent > VTP Domain Name : cisco > VTP Pruning Mode : Enabled > VTP V2 Mode : Disabled > VTP Traps Generation : Disabled > MD5 digest : 0xAA 0xD5 0x77 0x45 0xCC 0x3A 0xF6 0x6 > > Sw2(config-vlan)#do show int trunk > > Port Mode Encapsulation Status Native vlan > Fa0/19 on 802.1q trunking 1 > Fa0/20 on 802.1q trunking 1 > > Port Vlans allowed on trunk > Fa0/19 1-4094 > Fa0/20 1-4094 > > Port Vlans allowed and active in management domain > Fa0/19 1,12-13,30,40,55,60,100,200-201 > Fa0/20 1,12-13,30,40,55,60,100,200-201 > > Port Vlans in spanning tree forwarding state and not pruned > Fa0/19 1,12-13,30,40,55,60,100,200-201 > Fa0/20 1,12-13,30,40,55,60,100,200-201 > > Sw2(config-if)#sw mo a > Sw2(config-if)#sw a vlan 666 > % Access VLAN does not exist. Creating vlan 666 > Sw2(config-if)#do show int trunk > > > Vlan 666 will pass the trunk link if we do not explicitly tell the trunk to > remove the vlan in the interface configuration > > Sw2(config-if)#do show int trunk > > Port Mode Encapsulation Status Native vlan > Fa0/19 on 802.1q trunking 1 > Fa0/20 on 802.1q trunking 1 > > Port Vlans allowed on trunk > Fa0/19 1-4094 > Fa0/20 1-4094 > > Port Vlans allowed and active in management domain > Fa0/19 1,12-13,30,40,55,60,100,200-201,405,500,666 > Fa0/20 1,12-13,30,40,55,60,100,200-201,405,500,666 > > Port Vlans in spanning tree forwarding state and not pruned > Fa0/19 1,12-13,30,40,55,60,100,200-201,405,500,666 > Fa0/20 1,12-13,30,40,55,60,100,200-201,405,500,666 > > thanks, > Victor Cappuccio.- > - CCSI# 31452 > > Network Learning Inc - A Cisco Sponsored Organization (SO) YES! We take > Cisco Learning credits! > victor@ccbootcamp.com > http://www.ccbootcamp.com (Cisco Training and Rental Racks) > http://www.ccbootcamp.com/groupstudy.html (groupstudy member discounts!) > Voice: 702-968-5100 > FAX: 702-446-8012 > > > > -----Original Message----- > From: nobody@groupstudy.com on behalf of Michael Zuo > Sent: Fri 6/8/2007 14:45 > To: thomas.rader@freesurf.ch; ccielab@groupstudy.com > Subject: RE: STP lab gotchas > > This is one of the biggest gotcha's I've run into: Be aware of the > combination of VTP transparent mode and VTP pruning, which can prune > vlans on switches where you don't want them pruned ;) > > Michael Zuo > CCIE #17800 > CCIE study notes for sale :) > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=003&sspagename=STRK%3AM > ESE%3AIT&viewitem=&item=130121212718&rd=1&rd=1 > > -----Original Message----- > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of > thomas.rader@freesurf.ch > Sent: Friday, June 08, 2007 2:17 AM > To: ccielab@groupstudy.com > Subject: STP lab gotchas > > Hello, > > I'm hearing more and more that with the 4 switch labs, candidates are > having issues with STP loops. > > Does anyone know of any STP gotchas that could give you issues in the > lab ? > > > Thanks, Thomas > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
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