I'm running SRE-V 1.5.1 on SRE-910 and IOS 15.1(4)M.  Customer has an existing 192.168.3.1/24 network and we'd like to place 2911, hypervisor, and all VMs on this same subnet.  Most of the user guides, how-to's, etc all discuss SRE-V setup using VLANs.  Is it possible to put the router, hypervisor, and all VMs on the existing subnet?  If so, can you offer some guidance or point me to some documentation?  Thanks much.
John

To Add to Brett¿s reply in this example the VM¿s would be in vSwitch0 and also you would need to add routes for the VM¿s Ip addresses in the router.





From: Cisco Developer Community Forums [mailto:cdicuser@developer.cisco.com]
Sent: Monday, December 05, 2011 11:22 AM
To: cdicuser@developer.cisco.com
Subject: New Message from Brett Tiller in Service Ready Engine Virtualization - SRE-V Technical Questions: RE: Route, Hypervisor, and VMs on same subnet



Brett Tiller has created a new message in the forum "SRE-V Technical Questions":

--------------------------------------------------------------
Hi John,

Yes this all-in-configuration is possible to do without VLANs. You can create a point-to-point connection between the Gigabit and SM interfaces, then set the IPs of the VM on the same subnet as well. I've provided a snippet below for the router configuration.

--Router Configuration
interface GigabitEthernet0/1
ip address 192.168.3.20

interface SM 1/0
ip unnumbered GigabitEthernet0/1
service-module ip address 192.168.3.21 255.255.255.0
service-module ip default-gateway 192.168.3.20

ip route 192.168.3.21 255.255.255.255 SM1/0

--VM Configuration
1. In the VM operating system set the IP to be on the same subnet as the Gigabit and SM interfaces.
2. You now have the router, service module and VMs all on the same subnet.


For optimal performance we recommend that you install an EtherSwitch card as it reduces the cpu load on the router. We've provided a white paper showing how to configure the router with the design you've mentioned in the paper 'EtherSwitch Configuration on SRE-V.pdf' located in our knowledge base at http://developer.cisco.com/web/srev/docs .

Thank
Brett
--
To respond to this post, please click the following link:

<http://developer.cisco.com/web/srev/forums/-/message_boards/view_message/4851063>

or simply reply to this email.

Hi John,

Can you ping the 192.168.3.1 default gateway from the router and the service module (DCUI)? Everything is on the same subnet so it all should be pingable. You can try setting the service module default gateway to the 192.168.3.1 ip and see if that helps. Regarding getting out to the internet, you'll need to set up NAT since the 192.168 ip address is private.

Thanks,

Brett

Hi John,

I too am running into the same issue as you had originally, by setting everything into the same subnet. You say that your problems have all been resolved, that it was a config issue. Can you share what you found? I would be grateful for any reply! Thanks!