Hello
I have a network scenario similar to this:
Service Provider
------------ any-to-any --------
| 'Light Service' |
| |
-- --
|C | |D |
-- --
| .1 |.1
| |
------ ------
| 192.168.1.x | 192.168.2.x
| |
|.2 |.2
-- --
|A |------------1Gbps-----------|B |
-- --
| |
| |
------ ------
172.16.x.x 172.17.x.x
These are 2 Locations left and right.
Between, there's a 1Gbps link, which is mainly used to transmit Traffic from
Network 172.16.x.x to 172.17.x.x.
In addition to this, I have an MPLS/VPN-based any-to-any solution from my
service provider, which is used to connect these 2 Locations (192.168.x.x)
with 3 other locations. Unfortunately, this is just a 'light' service, which
means that the Service Provider only routes traffic between directly
connected networks (192.168.x.x) over the MPLS/VPN. Meaning, the SP won't
set up any additional routing. (light service = cheaper ;-)
Nevertheless, I'm thinking of using the Service Provider connection as a
backup for my 1Gbps link and the 172.x.x.x networks.
My idea is to use a GRE tunnel from 192.168.1.2 to 192.168.2.2, which means,
in normal condition traffic from 172.16.x.x to 172.17.x.x travels over the
1Gbps link, and if this fails, traffic is sent via a GRE-Tunnel over the
Service-Provider connection. GRE encapsulated traffic would appear to the
Service Provider as traffic between the 192.168.x.x networks.
Does this work and do you think this is a good idea? Are there any
constraints?
Any suggestions and comments would be appreciated.
Best regards
Lars
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