Connecting 2 site

[stein9700]

Good Morning,

I have 2 sites that we are going to merge into 1. I am not to concerned about IP Scheme as neither site has over lapping addresses. 

Site 1 10.32.24.0/21

Site 2 10.32.32.0/21

My concern is Vlans, both sites use the same vlan numbers and VTP. How can merge the 2 site and manage the VLAN?

Vlan examples 

Site 1 Vlan:

interface Vlan601
ip address 10.32.24.1 255.255.254.0

interface Vlan645
ip address 10.32.28.1 255.255.255.192

interface Vlan646
ip address 10.32.29.1 255.255.255.0

Site 2 Vlan:
interface Vlan601
ip address 10.32.32.1 255.255.254.0

interface Vlan646
ip address 10.32.36.1 255.255.254.0

interface Vlan678
ip address 10.32.38.1 255.255.255.128

Thanks

Stein9700

[Mark Malone · Accepted solution]

Hi
Make the links between the sites layer 3 , so there not trunked and they cant see same vlan ids , that will allow you keep sane vlan ids each side

[Jon Marshall]

If you want to use the same vlan numbers then you need to route the vlans on different L3 devices and route between those devices because you won't be able to create the same L3 interface twice on the same device. 

Jon

[Joseph W. Doherty]

When you say merge, you mean you want the two sites to have a trunk connection? For example, that trunk will have VLAN 601 on both sides, but they are different networks?

If they (the two sites) will have a L3 connection, why couldn't you continue to manage the two sites as their own VTP domain?

If you really had to trunk them together, VTP domain name would allow you to manage the VTP domains separately, and you could even have the same VLAN number, with an SVI, with an address for both sites (one a secondary) on a shared device, but that would intermix the two networks. The latter, you want to avoid?

If would be helpful if you could further clarify what your end goal "merged" result should be.

[stein9700]

Yeah

"merge" might have been a bad term.

Objective:

Site 1 is the main warehouse, Firewall, Layer 3 & 2 switches ISP is 50 mb circuit

Site 2 is the secondary warehouse Firewall, Layer 3 & 2 switches ISP a 4g modem 

The goal was for site 2 to share the ISP of site 1 leveraging a point to point wireless bridge. The building are 200 yards apart with no obstructions.

thanks

[Jon Marshall]

If each site has a L3 switch just make a routed link across the wireless and use a default route in site 2 pointing to site 1 for internet connectivity.

You may also want to run a routing protocol for each sites subnets or you could just use statics. 

Jon

[stein9700]

So site 2 has 2960s, not a true layer device.

I will try the routed interfaces first and see how it works. 

stein9700