Server not talking to certain VLANS

Posted on 2014-04-04
Last Modified: 2016-11-23
Here is the enviroment config:
Brocade ICX-6450 Layer 3 Switch as the Core Switch
Dell Poweredge server with VMWare hosting Windows 2008 R2 server with Sophos AV
HP Procurve 2510G layer 2 Switches on the floor

I discovered today that if I have endpoints that need to get updates from the Sophos server that they can't if they are in VLAN 2 - 8.  The end point can't ping the server and the server cannot ping the endpoint.  The exception to that is if the endpoint is in VLAN 9.  I am not sure if this is a network issue or a server issue.
Question by:BMCISAdmin
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LVL 18

Expert Comment

ID: 39979154
When switching the endpoint between vlans, I'm assuming you are changing the IP address also to match the vlan ip scope. If yes, there may be an access rule allowing only traffic from vlan 9 or you may not have the appropriate routes in place.

What vlan is the Sophos server in?

Author Comment

ID: 39979171
The endpoints can get anywhere else except this server.  I have two other servers hosted on this box that are in the same VLAN and endpoints have no problem getting to those.  Hense my confusion.
LVL 18

Assisted Solution

Akinsd earned 250 total points
ID: 39979180
So the servers are in a virtual environment.
- Verify that you change the IP address also whenever you change the vlan id.
- Are you using hyper V or VMware?
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Assisted Solution

by:Hassan Besher
Hassan Besher earned 250 total points
ID: 39979196
does the Sophos server has reachability to its gateway?
what is the output of tracing from that server to its clients?

Accepted Solution

BMCISAdmin earned 0 total points
ID: 39979213
Stumbled onto the answer myself.  I created a reservation on the DHCP server and then switched the server to DHCP.  It pulled the correct settings and started to talk to all endpoints.

Author Comment

ID: 39982378
I've requested that this question be closed as follows:

Accepted answer: 0 points for BMCISAdmin's comment #a39979213

for the following reason:

Proper configuration goes a long way.
LVL 18

Expert Comment

ID: 39980832
That is not stumbling on the answer though. That's the same thing the experts were telling you.

It pulled the correct settings

Apparently, the ip address you were using did not match your vlan id.

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