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Webcast-Catalyst9k
New Member

VTP update troubles

     Hello.

Can anyone help me with this trouble

Thereis network with c3750e and 4900m switches.

nsk-cat6 is in server mode, all othears in client mode.

When adding new vlan on server? some of the switches das not update vtp database.

vtp domain is ok

vtp password is ok.

Here some logs and configs

SERVER

sh vtp st

VTP Version                     : 2

Configuration Revision          : 1233

Maximum VLANs supported locally : 1005

Number of existing VLANs        : 457

VTP Operating Mode              : Server

VTP Domain Name                 : rt-comm.nsk

VTP Pruning Mode                : Disabled

VTP V2 Mode                     : Enabled

VTP Traps Generation            : Disabled

MD5 digest                      : 0xFB 0xB1 0x37 0x72 0xA5 0x10 0xB5 0x16

Configuration last modified by 217.107.45.241 at 2-2-12 04:56:14

Local updater ID is 217.107.45.241 on interface Vl8 (lowest numbered VLAN interface found)

ON NOT UPDATED SWITCH

sh vtp sta                        

VTP Version                     : running VTP2

Configuration Revision          : 1216

Maximum VLANs supported locally : 1005

Number of existing VLANs        : 455

VTP Operating Mode              : Client

VTP Domain Name                 : rt-comm.nsk

VTP Pruning Mode                : Disabled

VTP V2 Mode                     : Enabled

VTP Traps Generation            : Disabled

MD5 digest                      : 0xB2 0x61 0xF0 0x11 0xA9 0x09 0x38 0x36

Configuration last modified by 95.172.144.132 at 2-1-12 11:00:01

Feb  2 09:04:58.569 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 102

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Summary packet received, domain = rt-comm.nsk, rev = 1233, followers = 10, length 80, trunk Te1/0/2

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Validate TLVs : #tlvs 1, max blk size 4

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Validate TLVs : #00, val 6, len 4

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Summary packet rev 1233 greater than domain rt-comm.nsk rev 1216

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Domain rt-comm.nsk currently not in updating state

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: pdu len 80, #tlvs 1

Feb  2 09:04:58.569 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 1506

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Subset packet received, domain = rt-comm.nsk, rev = 1233, seq = 1, length = 1484

Feb  2 09:04:58.569 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 1482

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Subset packet received, domain = rt-comm.nsk, rev = 1233, seq = 2, length = 1460

Feb  2 09:04:58.569 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 1494

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Subset packet received, domain = rt-comm.nsk, rev = 1233, seq = 3, length = 1472

Feb  2 09:04:58.569 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 1514

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Subset packet received, domain = rt-comm.nsk, rev = 1233, seq = 4, length = 1492

Feb  2 09:04:58.569 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 1498

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Subset packet received, domain = rt-comm.nsk, rev = 1233, seq = 5, length = 1476

Feb  2 09:04:58.569 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 1486

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Subset packet received, domain = rt-comm.nsk, rev = 1233, seq = 6, length = 1464

Feb  2 09:04:58.569 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 1502

Feb  2 09:04:58.569 MSK: VTP LOG RUNTIME: Subset packet received, domain = rt-comm.nsk, rev = 1233, seq = 7, length = 1480

Feb  2 09:04:58.577 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 1510

Feb  2 09:04:58.577 MSK: VTP LOG RUNTIME: Subset packet received, domain = rt-comm.nsk, rev = 1233, seq = 9, length = 1488

Feb  2 09:04:58.577 MSK: vlan manager pkt rcvd on TenGigabitEthernet1/0/2, length 134

ON UPDATE SWITCH

Feb  2 09:06:28.771 MSK: VTP LOG RUNTIME: Transmit vtp summary, domain rt-comm.nsk, rev 1233, followers 10, tlv blk size 8 (inc #tlv field),

   MD5 digest calculated = FB B1 37 72 A5 10 B5 16 9C 77 70 49 8F 5C E0 73

9 REPLIES
Cisco Employee

VTP update troubles

Hi Alexey,

What is the platform specification (IOS, model) for the switch that fail to get VTP update?

Nikolay

New Member

VTP update troubles

Cisco IOS Software, C3750E Software (C3750E-UNIVERSAL-M), Version 12.2(53)SE1, RELEASE SOFTWARE (fc2)

New Member

VTP update troubles

Hi, Nikolay,  

on working part

Cisco IOS Software, C3750E Software (C3750E-UNIVERSAL-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)

New Member

VTP update troubles

Hi;

    Looking at the outputs you attached above, the MD5 digest on both the switches doesn't match. So it looks like a VTP password mismatch. So could you double check the VTP passwords on both switches.

HTH

Regards;

Venkata

Cisco Employee

VTP update troubles

Hi Alexey,

I also offer to check the posibility of the following bug

CSCth44403 CBS3120 could not update vtp database correctly

That is affecting all 3k platforms and fix available in 12.2(58)SE

Please run the following commands several times each to see if SUP drop counters growing during VTP advertisments receivement:

show controller ethernet-controller port-asic statistics | inc Sup Queue 4

show buffers | be RxQ4

Nik

New Member

VTP update troubles

Hi.

I reenter password -  its not helping.

It's began   at same time on several swicthes.

The second fact is - all not working switches have same "not right"  MD5 digest. If i bring one of the NOT working switches to serverv mode, vtp updates on all of notworking switches.

New Member

VTP update troubles

     17162 Sup Queue 4 Drop Frames               0 Sup Queue 12 Drop Frames  

cat8#show controller ethernet-controller port-asic statistics | inc Sup Queue 4

         0 Sup Queue 4 Drop Frames               0 Sup Queue 12 Drop Frames  

     17163 Sup Queue 4 Drop Frames               0 Sup Queue 12 Drop Frames  

cat8#

DROPs encounted  during vtp updates

New Member

VTP update troubles

Thenks, Nikolay,   I think u right.

Will check after changing ISO.

New Member

VTP update troubles

ISO  read like IOS

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