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vxp

6 Posts

54280

May 23rd, 2013 03:00

vlan communication between 2 switches 5524

Hello

I am trying to setup a VLAN network between 2 switches 5524 connected with each other through the 10Gbit port:

- VLAN 2 with subnet 192.168.2.1 netmask 255.255.128.0 between port 12-17

- VLAN 3 with subnet 192.168.130.1 netmask 255.255.128.0 between port 18-23

I set the port SFP in trunk mode and all the port related to VLAN in access mode

I can't seem to ping devices when one is connected on 1 switch and the one machine connected on the other switch.

Here is parts of my configuration related to that:

Switch 1:

no spanning-tree
vlan database
vlan 2-3
exit
interface vlan 2
 name VLAN2 
 ip address 192.168.2.1 255.255.128.0 
 ip dhcp relay enable 
!
interface vlan 3
 name VLAN3
 ip address 192.168.130.1 255.255.128.0
 ip dhcp relay enable
!
interface gigabitethernet1/0/12
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/13
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/14
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/15
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/16
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/17
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/18
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/19
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/20
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/21
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/22
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/23
 qos cos 7 
 switchport access vlan 3 
!
interface tengigabitethernet1/0/1
 switchport mode trunk 
!
 

Switch 2:
 

no spanning-tree
vlan database
vlan 2-3
exit
 

interface vlan 2
 name VLAN2 
 ip address 192.168.2.128 255.255.128.0 
!
interface vlan 3
 name VLAN3
 ip address 192.168.130.128 255.255.128.0
!
 

interface gigabitethernet1/0/12
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/13
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/14
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/15
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/16
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/17
 qos cos 7 
 switchport access vlan 2 
!
interface gigabitethernet1/0/18
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/19
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/20
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/21
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/22
 qos cos 7 
 switchport access vlan 3 
!
interface gigabitethernet1/0/23
 qos cos 7 
 switchport access vlan 3 
 

!
 

interface tengigabitethernet1/0/1
 switchport mode trunk 
 

 

Can you see the problem? Thank you for your help.
vxp
6 Posts
May 23rd, 2013 07:00
Hello
 

I tried to do so but the command is not taken into account.
 

For example when I type:
 

console(config)# interface tengigabitethernet 1/0/1
 

console(config-if)# switchport mode trunk
 

console(config-if)# switchport trunk allowed vlan add 2-3  (here cannot write tagged or untagged as it is in trunk mode)
 

console(config-if)#exit
 

Then i do a show running-config:
 

interface tengigabitethernet1/0/1
 

  switchport mode trunk
 

!
 

NO SIGN OF THE PARAMETER switchport trunk allowed vlan add 2-3
 

I tried then to do it in general mode but no success either.
 

Any suggestion??
 

To answer your question, right now I want VLAN to be separate.
 

I only need VLAN to communicate within itself: Devices connected on ports of VLAN2 of Switch 1 with other devices on ports VLAN2 of Switch 2
 

When/If I need VLAN 2 and 3 to communicate, I will use a router.
hohrlaum
11 Posts
May 23rd, 2013 12:00
for your trunk port you should only need:
 

switchport mode trunk
 

switchport trunk allowed vlan add 2-3
hohrlaum
11 Posts
May 23rd, 2013 12:00
or maybe try individual:
 

switchport trunk allowed vlan add 2
 

switchport trunk allowed vlan add 3
vxp
6 Posts
May 24th, 2013 02:00
I feel like the command "switchport trunk allowed vlan add 2-3" doesnt show because the trunk mode allows vlan 2 and 3 by default (it's the same as switchport mode access it is the default mode so even if I type it it doesnt show on the running-config.
 

The workstations are communicating just fine on VLAN1... but only vlan 1!! I am trying to see what is the difference between VLAN1 and the others.
 

The DHCP is disabled for now, I am entering the IP addresses manually, for example:
 

Station A : 192.168.2.2 (on Switch1)
 

Interface VLAN2 (on Switch 1): 192.168.2.1 netmask 255.255.128.0
 

Station B (on Switch2) : 192.168.2.129
 

Interface VLAN 2 (on Switch 2): 192.168.2.128 netmask 255.255.128.0
 

Later on, I will set up a DHCP with DHCP pools dividing the subnet in 2 or more if I add Switches
 

But I don't think I have set up any default gateway. Could that be the problem??
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