Two Separate gateway same VLan.. Possible?

Hi there,

I have a question that I am not sure if it possible, please advise.

Here is the scenario.

I have a Wireless Cisco Controller model 4400, this device needs to be
connected to the same VLAN in my layer 3 Switch ( HP 54850A ) in order
for communication with the access points across the network (LWAAP)


In the Controller, I have setup two WLAN.

1. CompanyWiFi
2. CustomerWiFi

The companyWiFi SSID hands over the regular network IP address for
example 192.168.0.X
if you Connect to the CustomerWiFi you get the IP range of 172.16.0.X

Since the controller is connected to the same L3 Switch, same VLAN..
only the 192.18x.0.X is currently working and being router correctly.
The 172.16.0.X range is not being routed correctly. This is where my
question arises.



Is it possible to have two separate gateway on the same VLAN and
specify a GW to use according to the source IP?

for example.

192.168.0.x >>>> 192.168.0.254
172.16.0.x >>>>>>>> 172.16.0.254

I was thinking of connecting a linux firewall/router to the same VLAN
with the GW IP address of 172.16.0.254 , hence only the 172.16.0.X
will route through the linux box, everything else the ( 192.168.X )
will exit out of the 192.168.0.254 GW.



The other solution I was thinking is to add a Router inbetween the
Controller and the L3 Switch. Have the router with multiple nic and
let it do the routing. The L3 Switch will only contain the Vlans
which would be properly mapped via the router.


Any advise on this scenarion, would be highly appreciated.

Yader

On Jan 28, 3:13 pm, "YADER.C...@gmail.com" <YADER.C...@gmail.com>
wrote:
> Hi there,
>
> I have a question that I am not sure if it possible, please advise.
>
> Here is the scenario.
>
> I have a Wireless Cisco Controller model 4400, this device needs to be
> connected to the same VLAN in my layer 3 Switch ( HP 54850A ) in order
> for communication with the access points across the network (LWAAP)
>
> In the Controller, I have setup two WLAN.
>
> 1. CompanyWiFi
> 2. CustomerWiFi
>
> The companyWiFi SSID hands over the regular network IP address for
> example 192.168.0.X
> if you Connect to the CustomerWiFi you get the IP range of 172.16.0.X
>
> Since the controller is connected to the same L3 Switch, same VLAN..
> only the 192.18x.0.X is currently working and being router correctly.
> The 172.16.0.X range is not being routed correctly. This is where my
> question arises.
>
> Is it possible to have two separate gateway on the same VLAN and
> specify a GW to use according to the source IP?
>
> for example.
>
> 192.168.0.x >>>> 192.168.0.254
> 172.16.0.x >>>>>>>> 172.16.0.254
>
> I was thinking of connecting a linux firewall/router to the same VLAN
> with the GW IP address of 172.16.0.254 , hence only the 172.16.0.X
> will route through the linux box, everything else the ( 192.168.X )
> will exit out of the 192.168.0.254 GW.
>
> The other solution I was thinking is to add a Router inbetween the
> Controller and the L3 Switch. Have the router with multiple nic and
> let it do the routing. The L3 Switch will only contain the Vlans
> which would be properly mapped via the router.
>
> Any advise on this scenarion, would be highly appreciated.
>
> Yader

Hmm.. this is an interesting dilemma. My suggestion would be to
firmly grasp your L3 switch, tilt it sideways and forcefully shove it
into your rectum. Once inserted, the switch should be able to pass
traffic from both subnets without the need to configure a separate
gateway.

(E-Mail Removed) wrote:
> Hi there,
>
> I have a question that I am not sure if it possible, please advise.
>
> Here is the scenario.
>
> I have a Wireless Cisco Controller model 4400, this device needs to be
> connected to the same VLAN in my layer 3 Switch ( HP 54850A ) in order
> for communication with the access points across the network (LWAAP)
>
>
> In the Controller, I have setup two WLAN.
>
> 1. CompanyWiFi
> 2. CustomerWiFi
>
> The companyWiFi SSID hands over the regular network IP address for
> example 192.168.0.X
> if you Connect to the CustomerWiFi you get the IP range of 172.16.0.X
>
> Since the controller is connected to the same L3 Switch, same VLAN..
> only the 192.18x.0.X is currently working and being router correctly.
> The 172.16.0.X range is not being routed correctly. This is where my
> question arises.
>
>
>
> Is it possible to have two separate gateway on the same VLAN and
> specify a GW to use according to the source IP?

define a secondary adress on your L3 switch in the same vlan interface

from cisco sample ( I don't know hp l3 )
interface Vlan999
ip address 10.0.0.254 255.255.255.0 secondary
ip address 172.20.176.254 255.255.255.0


>
> for example.
>
> 192.168.0.x >>>> 192.168.0.254
> 172.16.0.x >>>>>>>> 172.16.0.254
>
> I was thinking of connecting a linux firewall/router to the same VLAN
> with the GW IP address of 172.16.0.254 , hence only the 172.16.0.X
> will route through the linux box, everything else the ( 192.168.X )
> will exit out of the 192.168.0.254 GW.
>
>
>
> The other solution I was thinking is to add a Router inbetween the
> Controller and the L3 Switch. Have the router with multiple nic and
> let it do the routing. The L3 Switch will only contain the Vlans
> which would be properly mapped via the router.
>
>
> Any advise on this scenarion, would be highly appreciated.
>
> Yader
>
>

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Hash: SHA1

(E-Mail Removed) wrote:
| Hi there,
|
| I have a question that I am not sure if it possible, please advise.
|
| Here is the scenario.
|
| I have a Wireless Cisco Controller model 4400, this device needs to be
| connected to the same VLAN in my layer 3 Switch ( HP 54850A ) in order
| for communication with the access points across the network (LWAAP)
|
|
| In the Controller, I have setup two WLAN.
|
| 1. CompanyWiFi
| 2. CustomerWiFi
|
| The companyWiFi SSID hands over the regular network IP address for
| example 192.168.0.X
| if you Connect to the CustomerWiFi you get the IP range of 172.16.0.X
|
| Since the controller is connected to the same L3 Switch, same VLAN..
| only the 192.18x.0.X is currently working and being router correctly.
| The 172.16.0.X range is not being routed correctly. This is where my
| question arises.
|
|
|
| Is it possible to have two separate gateway on the same VLAN and
| specify a GW to use according to the source IP?
|
| for example.
|
| 192.168.0.x >>>> 192.168.0.254
| 172.16.0.x >>>>>>>> 172.16.0.254
|
| I was thinking of connecting a linux firewall/router to the same VLAN
| with the GW IP address of 172.16.0.254 , hence only the 172.16.0.X
| will route through the linux box, everything else the ( 192.168.X )
| will exit out of the 192.168.0.254 GW.
|
|
|
| The other solution I was thinking is to add a Router inbetween the
| Controller and the L3 Switch. Have the router with multiple nic and
| let it do the routing. The L3 Switch will only contain the Vlans
| which would be properly mapped via the router.
|
|
| Any advise on this scenarion, would be highly appreciated.
|
| Yader
|
|
I think I just did something similar, and posted a question a few days
ago. "redhat FC8 routing problem"

Its out of the context of vlans but it would seem that you could
configure the host to use whatever gateway you wanted, as long as the
host has a route to the gateway.

(refer to other thread for diagram)
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