VLAN and Trunk problem

[TimothyFan6510]

Hi all,

We have 2 network connected together with fiber connection.

Network A belongs to us and network B belongs to mother company with both side have multiple VLANs

Network A (our switch) have the following VLANs configured as follows:

interface Vlan1
no ip address
!
interface Vlan65
no ip address
!
interface Vlan100
no ip address
!
interface Vlan101
no ip address
!
interface Vlan102
no ip address
!
interface Vlan103
ip address 10.7.3.254 255.255.255.0
!

Our main local Vlanis 103, 65 is for Video Conference purpose. Trunk port config as follows:

interface GigabitEthernet1/1/1
description 16F-WS-C2960X Gig 1/0/52
switchport trunk native vlan 100
switchport trunk allowed vlan 2,65,100-109
switchport mode trunk

Network B have Vlan65 as follows:

interface Vlan65
ip address 10.65.2.65 255.255.255.248

(We just got this information from them)

We have also configured a port as follows:
interface GigabitEthernet2/0/14
switchport access vlan 65
switchport mode access
spanning-tree portfast

and connected to a device with IP:
10.65.2.68/255.255.255.248 Gateway:10.65.2.65

While mother company VLAN 65 have connect to a device IP 10.65.2.66

The problem is our switch now can ping both 10.65.2.65 and 10.65.2.66 but we cannot ping 10.65.2.68 which belongs to our VC Device. Nether do 10.65.2.68 ping or connect 10.65.2.65/66.

We cannot check the configuration of Network B switch. What seems to be the problem ? THX

[Edwin Portillo]

My Friend,
Have you verified that between the two switches the interface is a trunk?

[Edwin Portillo]

As far as I can see, you should configure an IP within the range in network A specifically in VLAN 65, as network B does.

[balaji.bandi]

As per your description below  you have confifgured L3 point to point interface.

The problem is our switch now can ping both 10.65.2.65 and 10.65.2.66 but we cannot ping 10.65.2.68 which belongs to our VC Device. Nether do 10.65.2.68 ping or connect 10.65.2.65/66.

you need to extend the vlan using Trunk configuration, how you did on Network A 

nterface GigabitEthernet1/1/1
description 16F-WS-C2960X Gig 1/0/52
switchport trunk native vlan 100
switchport trunk allowed vlan 2,65,100-109
switchport mode trunk

Network B - same configuration required other side where the interface connected from network A to network B

here is the steps :

1. remove the connected cable.

2. default the interface config

3 apply below config.

interface GigabitEthernet 1/0/52
description to Network-A
switchport trunk native vlan 100
switchport trunk allowed vlan 2,65,100-109
switchport mode trunk

4. We have also configured a port as follows:
interface GigabitEthernet2/0/14
switchport access vlan 65
switchport mode access
spanning-tree portfast

5. connect the device and test it.

[TimothyFan6510]

Thx for all your help. I was requested for the config of NETWORK B already but it take times to get it from the other party and want to ensure if i have donw anything wrong since it is long time since last i config switches. Will update again once i got it.

[TimothyFan6510]

Another side help checked  their switch that they had no such setting in the interface

switchport trunk native vlan 100
switchport trunk allowed vlan 2,65,100-109
switchport mode trunk

adding them back but still in vain. Any other possibility ?

[TimothyFan6510]

Anyone could offer help ? i got all the config. files. I can email to you if anyone can help. THX

[balaji.bandi]

sorry was away on vacation, can you post the latest config and tests done , so we can assits from here.