vlan and trunking

[BilalButt62333]

I am facing a strange issue in which the same vlan host can't ping each other but when on the trunk it's pingable. even inter-vlan routing rule is configured on the firewall.

ERP_Server------switch---trunk_link----switch-----PC

when the server and pc are on the same VLAN 35 pc can't ping the server but when I put the port of the server on the trunk then pc can ping the server.

Note: The server is connected through SPF on the TenGig switch SFP module port

[marce1000]

           - As a sanity check , verify if the PC can ping another host on (native) VLAN 35 (?)

 M.

[M02@rt37]

hello @BilalButt62333,

Please verify port config

ERP_Server------[ACCESS port] switch [TRUNK Port]---trunk_link----[TRUNK Port] switch[ACCESS port] -----PC

'vlan configuration'
vlan 35
name DATA
!
'ACCESS PORT'
interface X/X
switchport mode access
switchport access vlan 35
spanning-tree porfast
no shut
!
'TRUNK PORT'
interface X/X
switchport mode trunk
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 35
no shut

PC and server on same subnet (mask), no need Gateway.

[Flavio Miranda]

Hi @BilalButt62333 

 You need to change the servers port to access. As per the description the server might be configured as trunk and when you put the switch in access the communication fail.

 I believe this might be the problem

[BilalButt62333]

I mean to say trunk on the switch port . well, I don't know if there's an option on the server interface option to config access/trunk. if there is then might be a problem there 

[BilalButt62333]

'vlan configuration'
vlan 35
name DATA
!
'ACCESS PORT'
interface X/X
switchport mode access
switchport access vlan 35
no shut
!
'TRUNK PORT'
interface X/X
switchport mode trunk
switchport trunk encapsulation dot1q
no shut

Note: ERP_Server------[ACCESS port] 

we are not able to ping the server until the port is trunk 

[Flavio Miranda]

Because the Server is using trunk. Can you check the server side?

[MHM Cisco World]

1-The SW using different native vlan.

Match it.

2- the server send traffic with tag vlan-id' some SW accpet it other drop traffic 

When you change to trunk it make sw accept tag frame.

In server NIC no tag frame 

[MHM Cisco World]

HowTo Configure Multiple VLANs on Windows 2012 Server (site.com)

[BilalButt62333]

server is not windows server it's ERP

[BilalButt62333]

there's no native configured in the whole network

[MHM Cisco World]

then check second points I share above