I think in the same guest network we can't have few VMs with dynamic IP addresses and others with static.
-----Original Message----- From: Alex Hartner [mailto:ahart...@thunderhead.com] Sent: Friday, March 21, 2014 10:39 AM To: users@cloudstack.apache.org Subject: RE: Reserving IP address in DHCP range Hi Sanjeev, Thanks for getting back to me. I found this article as well, however it mentions: "If your customers wish to have non-CloudStack controlled VMs or physical servers on the same network, they can share a part of the IP address space that is primarily provided to the guest network." In our case we want to allocate some cloudstack contolled VM with dynamic IP addresses and others with static ones. We don't have any non-cloudstack controlled VMs in this scenario. Would this approach still work in this case ? If this is the case what are the options of configuring the size of the reserved range. Using /26 gives us : 10.1.1.64 to 10.1.1.254 which is quite large. Ideally we would only need a static range of around 50 addresses with the remainder open to dynamic allocation. Regards Alex Alex Hartner Enterprise Architect T +44 20 8238 7423 F M mailto:ahart...@thunderhead.com Thunderhead.com is the trading name of Thunderhead Limited which is registered in England under No. 4303041 whose registered office is at Ingeni Building, 17 Broadwick Street, Soho, London. W1F 0DJ. ---------------------------------------------------------------------- The contents of this e-mail are intended for the named addressee only. It contains confidential information. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it. ---------------------------------------------------------------------- -----Original Message----- From: Sanjeev Neelarapu [mailto:sanjeev.neelar...@citrix.com] Sent: Friday, 21 March 2014 12:57 PM To: users@cloudstack.apache.org Subject: RE: Reserving IP address in DHCP range Hi Alex, We can reserve few IP address range from the guest CIDR for static allocation. E.g. if guest CIDR is 10.x.x.0/24 you can reserve IP range 10.x.x.0/26 for static allocation. For more information please refer to http://cloudstack.apache.org/docs/en-US/Apache_CloudStack/4.2.0/html/Installation_Guide/reserved-ip-addresses-non-csvms.html Regards, Sanjeev -----Original Message----- From: Alex Hartner [mailto:ahart...@thunderhead.com] Sent: Thursday, March 20, 2014 4:43 PM To: CloudStack-Users Subject: Reserving IP address in DHCP range Hi all, Most of our systems are allocated IP addresses from the CIDR of the guest network which is defined at 10.X.X.0/24. Some of our VMs require a static IP address, so we allocate these manually on startup and specify the IPADDRESS attribute on the startup request (example : nic>ipaddress=10.X.X.254). Since the “static” ip addresses are assigned from the top end of the range and the “dynamic” ones are assigned starting from the bottom we didn’t have an issue initially. However with the number of VMs growning we not entered a phase where the address ranges overlap. My question is what are the options for reserving certain addresses on the guest network for manual allocation. Is it sufficient to acquire the ip addresses, and will I be able to assign an acquired IP address to a VM on startup ? Regards Alex Alex Hartner Enterprise Architect T +44 20 8238 7423 F M ahart...@thunderhead.com<mailto:ahart...@thunderhead.com> [http://thunderhead.com/email_signature/images/thf2.gif] Thunderhead Limited www.thunderhead.com<http://www.thunderhead.com> WE'RE HIRING[http://thunderhead.com/email_signature/images/ar.gif]<http://www.thunderhead.com/company/careers/available-roles/> THE BLOG[http://thunderhead.com/email_signature/images/ar.gif]<http://www.thunderhead.com/blog> [http://thunderhead.com/email_signature/images/lki.jpg]<http://www.linkedin.com/company/25033> [http://thunderhead.com/email_signature/images/tw.jpg] <http://twitter.com/Thunderheadon> [http://thunderhead.com/email_signature/images/rss.jpg] <http://www.thunderhead.com/rss-feeds> [http://thunderhead.com/email_signature/images/yt.jpg] <http://www.youtube.com/ThunderheadOn> Thunderhead.com is the trading name of Thunderhead Limited which is registered in England under No. 4303041 whose registered office is at Ingeni Building, 17 Broadwick Street, Soho, London. 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