You can assigned the network address as a valid ip address from a /31, and this is defined in RFC 3021 (http://www.ietf.org/rfc/rfc3021.txt).
This is widely supported on network gear, and in modern operating systems. - Si ________________________________________ From: Remi Bergsma <r...@remi.nl> Sent: Thursday, May 21, 2015 10:31 AM To: dev@cloudstack.apache.org Subject: Re: support for /31 Networks Hi, This question was answered here as well: http://markmail.org/message/m7vi342uwm4zr5iv Support was removed as /31 has no available ip addresses. Regards, Remi 2015-05-21 16:42 GMT+02:00 Ian Southam <isout...@schubergphilis.com>: > Hi Devender, > > You have started quite a discussion in our office about using the .0 and > putting a host on the cast address …... > > Just as a matter of interest, why do you do this - we are presuming it > does actually work ;) > > — > Grts! > Ian > > > On 21 May 2015, at 10:29, Singh, Devender <dsi...@virtela.net> wrote: > > > > Hi Cloudstack Team, > > > > > > We had no problems building and using /31 networks on 4.2.0, but after > our upgrade to 4.4.2 we are no longer able to add new ones. > > We have a lot of them already in place. As an example I pasted some > output from cloudmonkey on a link that is already established and working. > > Does anyone have a workaround, or can point me in the right direction > for a patch? > > (local) > list networks id=e044c442-48f7-4bae-8c5d-530423a249f7 > > count = 1 > > network: > > id = e044c442-48f7-4bae-8c5d-530423a249f7 > > name = VLAN180 > > acltype = Domain > > broadcastdomaintype = Vlan > > broadcasturi = vlan://180 > > canusefordeploy = False > > cidr = 202.90.43.0/31 > > displaynetwork = True > > displaytext = VM-UTILITY-2 > > dns1 = 4.2.2.1 > > domain = ROOT > > domainid = 8acf0368-e5b1-11e2-b5cf-2ef4cf18a6ae > > gateway = 202.90.43.0 > > ispersistent = False > > issystem = False > > netmask = 255.255.255.254 > > networkofferingavailability = Optional > > networkofferingconservemode = False > > networkofferingdisplaytext = private-guest1_switch > > networkofferingid = 0b63d457-5f5e-426f-a81e-8797e522eb8c > > networkofferingname = private-guest1_switch > > physicalnetworkid = cf4c2846-2418-4ba4-b307-6a6405860799 > > related = e044c442-48f7-4bae-8c5d-530423a249f7 > > restartrequired = False > > service: > > specifyipranges = True > > state = Setup > > strechedl2subnet = False > > subdomainaccess = True > > tags: > > traffictype = Guest > > type = Shared > > vlan = 180 > > zoneid = 88066cb4-64ab-4c54-83a9-3279a1e030cb > > zonename = UTILITY-ZONE-1 > > > > (local) > list nics nicid=e062922f-c0ea-4f8a-beca-b86146dee622 > virtualmachineid=842054e6-c379-49fe-92f9-e2fdefa6779f > > count = 1 > > nic: > > id = e062922f-c0ea-4f8a-beca-b86146dee622 > > deviceid = 0 > > gateway = 202.90.43.0 > > ipaddress = 202.90.43.1 > > isdefault = True > > macaddress = 06:ca:b4:00:00:20 > > netmask = 255.255.255.254 > > networkid = e044c442-48f7-4bae-8c5d-530423a249f7 > > virtualmachineid = 842054e6-c379-49fe-92f9-e2fdefa6779f > > (local) > > > > > Devender Kumar Singh > >
