ip - AWS setting CIRD -


i know topic has lot information on can't find answer simple question.

i willing have subnet each availability zone in region (3 zones). vpc cidr 10.0.0.0/19 , want each subnet have same amount of ips. question cidr block should assign each subnet?

10.0.0.0/19 has 8,192 ip addresses, 10.0.0.0 through 10.0.31.255

when dividing supernet subnets of equal size, can divide powers of 2 -- 2, 4, 8, 16, etc., block can't divided 3 blocks of equal size, can divided 4.

10.0.0.0/21 has 2,048 addresses 10.0.8.0/21 has 2,048 addresses 10.0.16.0/21 has 2,048 addresses 10.0.24.0/21 has 2,048 addresses

since 3 of these, reserve 1 of them use in 4th availability zone if given access 1 (some accounts have access more 3 availability zones in @ least 1 region) or other purposes.

however, though may not realize yet, you need @ least 2 subnets in each availability zone in each vpc. typically, instances go on private subnets, nat gateways or instances , elastic load balancers need in public subnets. see why need private subnets in vpc? more detail on how works.

so, need @ least 6 blocks. again, can't make 6 even-sized blocks, can make 8, , stash 2 leftovers away.

10.0.0.0/22 has 1,024 addresses 10.0.4.0/22 has 1,024 addresses 10.0.8.0/22 has 1,024 addresses 10.0.12.0/22 has 1,024 addresses 10.0.16.0/22 has 1,024 addresses 10.0.20.0/22 has 1,024 addresses 10.0.24.0/22 has 1,024 addresses 10.0.28.0/22 has 1,024 addresses

another important factor in vpc not need worry subnet machine on if communicating machine in same availability zone. there no difference in performance within availability zone whether 2 communicating instances on same subnets or not... may make sense use smaller subnets these, or variable length subnet masks, , segregate machines administrative convenience.


Comments

Post a Comment

Popular posts from this blog

php - How to add and update images or image url in Volusion using Volusion API -

actually have store importing products store product data insert , update image or image url not insert , update. this xml code name datapro.txt. <products_joined> <productcode>3710_012t</productcode> <vendor_partno>eah5450silent/di/1gd3(lp)</vendor_partno> <productname>test product ta</productname> <hideproduct>n</hideproduct> <stockstatus>20</stockstatus> <lastmodified>1/5/2016 10:25:00 am</lastmodified> <lastmodby>2</lastmodby> <productweight>0.9</productweight> <productprice>100</productprice> <productmanufacturer>asus tek</productmanufacturer> <vendor_price>32.69</vendor_price> <numproductssharingstock>0</numproductssharingstock> <categoryids>107</categoryids> <producturl>http://tebkq.mvlce.servertrust.com/productdetails.asp?productcode=3710_012t</producturl...
Read more

Laravel mail error `Swift_TransportException in StreamBuffer.php line 269: Connection could not be established with host smtp.gmail.com [ #0]` -

i developing website contact-us page guest users can send me email using gmail . anytime try send mail using contact-us form, error swift_transportexception in streambuffer.php line 269: connection not established host smtp.gmail.com [ #0] this mail.php return [ 'driver' => env('mail_driver', 'smtp'), 'host' => env('mail_host', 'smtp.gmail.com'), 'port' => 587, 'from' => ['address' => '', 'name' => ''], 'encryption' => env('mail_encryption', 'tls'), 'username' => env('mail_username'), 'password' => env(mail_password), 'sendmail' => '/usr/sbin/sendmail -bs', 'pretend' => env('mail_pretend', false), ]; this .env mail_driver=smtp mail_host=smtp.gmail.com mail_port=587 mail_username=afecjaped@gmail.com mail_password=********...
Read more

c# SetCompatibleTextRenderingDefault must be called before the first -

i tried search exception couldn't find solution on case i'am using code below invoke .net application : assembly assem = assembly.load(data); methodinfo method = assem.entrypoint; var o = activator.createinstance(method.declaringtype); method.invoke(o, null); the application invoked has form , in entrypoint of application : [stathread] static void main() { application.enablevisualstyles(); application.setcompatibletextrenderingdefault(false); //exception application.run(new form1()); } setcompatibletextrenderingdefault must called before first iwin32window object created in application. edit : assembly = assembly.load(data); methodinfo method = a.gettype().getmethod("start"); var o = activator.createinstance(method.declaringtype); method.invoke(o, null); you should create new method skips initialization...
Read more