In addition to this topic, I found quite interesting having this topology, observing network traffic flow. Based on my observation, I noticed that there is a suboptimal routing on this design. Attach network diagram to ease your understanding.
With this type scenario, if prefix 172.16.5.1/32 behind CEB-2 going to 172.16.4.1/32 to CEB-1, it follows to CEHQ network as per below:
How can I force this traffic not going to CEHQ? Any manipulation on the OSPF metric? I tried not to used sham-link because in this scenario, it's not a backdoor link. It seems to be that CEHQ is dual CE connected to dual PE plus another 2 sites more connected to PE which multi homed CEHQ is attached. Is there any possibilities that we could use like SoO in BGP/EiGRP?
Maher, SOO would be in effect if you have BGP as the PE-CE, in OSPF you would have down bit set, so the route learnt via MPBGP is not sent back into MPBGP.
The domain tag is not configured defaults to your ospf process id.
Now from the inputs what I learn is that you have configured the same process id for both the sites, hence at PE1 or PE2 the routes are getting learnt via ospf between the sites(like in vrf lite/ multiple vrf interfaces belong to the same ospf vrf process) and hence the MPBGP route was not being preferred, as it gets treated as a inter area route.
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Cisco Software Manager Server
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CSM Server supports a set of finite RESTful APIs. The fir...