cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
344
Views
0
Helpful
4
Replies
Highlighted
Contributor

why would i need my own public as number

Hi all

why would i need my own public as number? if i plan to use bgp witht he provider on my router would i need a public AS number myself ?

Everyone's tags (4)
4 REPLIES 4
Highlighted
Beginner

why would i need my own public as number

Hi

I was in same boat as you are now.  If ISP support BGP and you are comfortable with BGP config / support then no need for own AS number.

Highlighted
Contributor

why would i need my own public as number

why is this?

Highlighted
Hall of Fame Master

why would i need my own public as number

The AS number is needed for true multi-homing.

Usually ISPs are also Internet registries, and can get you one.

Highlighted
VIP Expert

why would i need my own public as number

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

Public IP address blocks are related to AS numbers.  When you connect to one ISP, they provide part of their address space for your usage.  If you want to multi-home, you can't advertise the provided addresses from one ISP as also belonging to another. If you get multiple ISP specific address blocks, you can NAT your internal addresses using the ISP provided address blocks, but true multi-homing requires your own address block and so your own AS.

One you have your own AS and public IPs, you can easily change ISPs and/or change how many you "peer" with as now you "own" the AS and IP address block.