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December 3rd, 2013 08:00

Regarding VLAN implementation

For testing:

- I put 2 machines on different port of L3 Switch.
Machine 1 IP --> 172.16.9.10 /16 (Switch Port - 1g/2) (VLAN 10)
Machine 2 IP --> 192.168.11.19 /24 (Switch Port - 1g/24) (VLAN 11)

- Created 2 VLANs 10 & 11.

config
vlan database
vlan 10
vlan 11
exit

- Assign IP address to Both Vlans

interface vlan 10
ip address 172.16.9.2 /16
routing
exit

interface vlan 11
ip address 192.168.11.2 /24
routing
exit

- Enable Routing

ip routing

- Assign VLANs to both machines

interface ethernet 1/g24
switchport mode access
switchport access vlan 11
exit

interface ethernet 1/g2
switchport mode access
switchport access vlan 10
exit

Configured VLAN IPs as default gateways on Machines.

Queries:
1. Now I could able to Ping from Machine1(VLAN10)  to Machine2 (VLAN11) but I am NOT able to Ping Machine2 (VLAN11) to Machine1(VLAN10). However I can Ping Machine2  (VLAN11)  to VLAN10 IP (172.16.9.2)

2. I am not able to access machines using Hostname or Netbios Name across the VLANs. (When I tried to dig into it, I found that VLAN blocks Netbios protocol so we need to either setup DNS server or DHCP server for it. Is there any other way to resolve this?


One query regarding implementation:
My L2 stack is connected to L3 by Fiber. Can I assign that Fiber Port to one VLAN on L3 switch and assign one more VLAN to all other ports on L3 switch for Machines like above. So that All Mchines on L2 stack can talk with machines on L3 switches.
Will there be any issues if we configure like ths in first phase?

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December 3rd, 2013 09:00

Hi,

Yes that should work as long as your L3 switch is routing between the VLANs it should allow the traffic on the fiber connection from VLANs 10 and 11 to talk with the other VLANs.

12 Posts

December 4th, 2013 02:00

Hi Josh,

Thanks for your reply.

However what about my other 2 queries? Any points?

Regards

Neelesh

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December 4th, 2013 07:00

What firmware version is the switch at? If both computers are on the same switch it should be able to ping both ways. Are the computers running Windows? If you run the show ip route command what is the output?

 

The issue with netbios over VLANs is that they use broadcasts to find the other computers and the VLANs separate them into different broadcast domains. You may be able to get it to work if you set up a master browser server in each VLAN to handle the communication.

 

http://technet.microsoft.com/en-us/library/cc959923.aspx

http://technet.microsoft.com/en-us/library/cc959931.aspx

12 Posts

December 6th, 2013 10:00

Hi Josh,
My L3 switch details are:
Boot Version : 3.3.3.3

Image1 Version : 3.3.3.3
Image2 Version : 3.3.3.3

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December 6th, 2013 11:00

Let's try updating to the latest firmware there were some fixes for issues with dropping traffic and pinging. http://www.dell.com/support/drivers/us/en/19/DriverDetails/Product/powerconnect-6248?driverId=77XG3&osCode=NAA&fileId=3288111910&languageCode=en&categoryId=NI

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