For many enterprise customers IPv6 is not an option, because critical applications are not IPv6 ready or not supported on IPv6.
There is some pressure towards IPv6 through US government/military and - for different reasons - asian countries.
So IPv6 is gaining more attention, but is far from completely replacing IPv4 (if ever).
ISIS is implemented in many large carrier and ISP networks. So I would not consider it to be obsolete. There are some pros and some cons compared to OSPF, f.e. there are still OSI protocol based applications requiring an OSI routing protocol. ISIS is the natural choice in such environments.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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