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I have an Ubuntu Instance (10.20.20.122) in Microstack. I can reach outside world from it but it is not reachable from outside network.For example, from the host (physical) LAN it is not reachable ( it is reachable only from host). There is a br-ex (10.20.20.1) bridge already available with the installation of Microstack. My host is Ubuntu 1804 Desktop Host IP is 193.166.x.y I want to ping the instance from other hosts as well (such as 193.166.x.y1,y2,y3.. etc.). Your help/suggestion is greatly appreciated. Thanks a million.

Sabbir Ahmed
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  • Provide more information. Is your instance connected to a provider network or a tenant network? Does it have a floating IP, and are you trying to connect to the floating IP? You say that it is reachable from the host - what do you do to reach it? – berndbausch Dec 07 '20 at 11:24

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I'm not sure if you're still looking for a solution. I've just published an approach to solve this problem in my blog. The link is:

https://connection.rnascimento.com/2021/03/08/openstack-single-node-microstack/

I've included some explanation why we can't change the default CIDR for br-ex and suggested a workaround.

Dharman
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Rodrigo Nascimento
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  • Thanks a lot for your response. Actually, I managed it to comply with our LAN. I will check your blog for checking more details though. – Sabbir Ahmed Mar 19 '21 at 20:55