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Cannot ping or SSH vlan 1 from other switches

AdiMahluf
Level 1
Level 1

 Hi,

i have 3 Catalyst 2960-X switches:
1. sw1 - main switch, the other switches chained to it by trunk. contain 6 vlans (include vlan1). IP address 192.168.1.2.
2. sw3 - contain 6 vlans (include vlan1). IP address 192.168.1.3.
3. sw7 - contain 3 vlans (include vlan1). IP address 192.168.1.8.

When i try to ping from SW1 to SW3 and vice versa on vlan1 - it works.
When i try to ping from SW1 to SW7 and visa versa on vlan1- its not working.
when i try to ping from SW3 to SW7 and visa versa on vlan1- its not working.
The other VLANs working perfectly.
i checked "Show cdp neighbors" on sw1 and able to see SW3 but not SW7.

i checked vtp domain and mode configured, i check vlan1 is not shutdown. default gateway is configured.
i even tried to connect another switch (2960, not X) and configure it, and its also working properly)

i'm working on it for the last 2 days and start to feel like its a bug. what could be the problem?

i attached configuration file for the 3 switches.

Thank you!
Adi

17 Replies 17

Show VTP Status for all switches:
SW1

SW01#show vtp status
VTP Version capable : 1 to 3
VTP version running : 1
VTP Domain Name : domain
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : b4a8.b927.dc00
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
Local updater ID is 192.168.1.2 on interface Vl1 (lowest numbered VLAN interface found)

Feature VLAN:
--------------
VTP Operating Mode : Server
Maximum VLANs supported locally : 1005
Number of existing VLANs : 19
Configuration Revision : 0
MD5 digest : 0x2A 0x6A 0x0B 0xA8 0xC8 0xC3 0x4A 0xF3
0xAE 0x28 0x4A 0xF4 0xA2 0x21 0x15 0x58
*** MD5 digest checksum mismatch on trunk: Gi1/0/23 ***

SW3

SW3#show vtp status
VTP Version capable : 1 to 3
VTP version running : 1
VTP Domain Name : domain
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 0027.909e.0080
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00

Feature VLAN:
--------------
VTP Operating Mode : Transparent
Maximum VLANs supported locally : 1005
Number of existing VLANs : 10
Configuration Revision : 0
MD5 digest : 0x91 0xFE 0xED 0xBF 0xBC 0xF1 0x21 0x0F
0xC3 0x61 0x3F 0xC6 0xE7 0x05 0x11 0xB6

SW7

SW7#show vtp status
VTP Version capable : 1 to 3
VTP version running : 1
VTP Domain Name : domain
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 2790.9348.1080
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00

Feature VLAN:
--------------
VTP Operating Mode : Transparent
Maximum VLANs supported locally : 1005
Number of existing VLANs : 10
Configuration Revision : 0
MD5 digest : 0x91 0xFE 0xED 0xBF 0xBC 0xF1 0x21 0x0F
0xC3 0x61 0x3F 0xC6 0xE7 0x05 0x11 0xB6

Looks like you have an MD5 mismatch between SW1 and SW7 - this is typically caused by an incorrect VTP password. Given that the hash on SW7 and SW3 are the same, I would assume that the ‘bad password’ is on SW1. I don’t necessarily think that this is the root of the ping issue you’re having, but it is something you should rectify. 

Hello,

 

just to be sure you have that covered, try another port on SW7 connecting to SW3, and also another cable...

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