We set up a new point to point GRE tunnel between R1 and R2 running OSPFv3 and IPv6. This was a second tunnel on R1 that mirrored the other GRE tunnel.
Now, although we were able to ping each other's source interfaces, ping FF02::5 and had PIM neighborship, OSPF never came up. We saw that both R1 and R2 were each sending Hello packets, but neither end was receiving them. My other tunnel was fully up throughout this time.
Throughout the day, along with troubleshooting, we periodically deleted and recreated the tunnel. For some reason, maybe after a "clear ospf process", after we recreated the tunnel one more time it finally came up.
The question I have: what could have caused this issue and why didn't one of the prior attempts to recreate the tunnel work?
the scenario is :I'm replacing core Cisco switch 4506-E with switch 4507R-E. As I have one supervisor card on 4506-E and I'm going to take out all the card that I have in 4506-E and install it in the new 4507R-E. On the 4507R-E I have 2 slots for the supe...
Since its release in August of 2019, the SASE report released by Gartner has generated a lot of chatter regarding what SASE is all about. People are wondering whether it will be disruptive to the current network and network security designs and are curiou...
I tried to setup a virtual environment with 2960 switches and 2911 Router. In one part of the network where I connected PCs directly to the 2911 Router, I was able to communicate to the attached devices, having configured static route. In the th...
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