IP Announcement systems

IP Announcement systems
what is IP announcement-min
what is an IP announcement?

Simply put, IP announcement is a system which provides services by linking groups of servers with dedicated terminals.  Many Managed Service Providers, including HostSailor, provide such a service as an IP Announcement (IPAN) service.

How to Announce IP Addresses?

IPAN enables you to make use of the large number of available IP addresses held on a rack server.  A specific advantage to the HostSailor IPAN service is that if you choose to move to a different service provider at a later stage, you have the option of keeping your IP addresses.

A prerequisite of operating an IPAN service is that the service provider is a registered provider, and has been assigned an AS number by the IP Address management authorities.

AS is an acronym for Autonomous Systems.  An Autonomous System (AS) groups IP networks with a single, clearly defined routing policy when run by one or more network operators.  Each AS is identified by a unique number: the Autonomous System Number (“ASN”) when exchanging exterior routing information.  A routing domain is an alternative description for an AS.

For example, HostSailor will advertise all your announced IP addresses from our HostSailor ASN, AS60117.

A Managed Service Provider usually also has a small number of requirements to keep in step with registration requirements:

  • The size of the IP prefix should be equal to or greater than a /24 range;
  • There is an accepted authorization method for announcing the IP ranges; and
  • A signed letter of authorization from the actual owner of the IP range.


BGP Announcement Lookup


BGP Announcement Lookup

BGP defines the exchange of routing information among AS on the Internet.   It is a standardized exterior gateway policy.   It exchanges, by the announcement, the preferred routes of Internet address blocks.

A further benefit is that there are no set limits for the amount of announced IP prefixes. Our IP announcement service will be available for dedicated servers in colocation services and shared/private racks.

The BGP Announcement Lookup operates in a similar way to DNS through Looking Glass Servers. Looking Glass servers hold routing tables setting out announced BGP preferred routes.

The BGP implementation on a network is able to access looking glass servers remotely to provide routing information. The looking glass servers access routers which belong to the looking glass service provider and return information about their announced BGP routing tables. This information can be used to verify routes are appropriately configured and propagated.  There are a range of third-party tools available for looking glass server lookup and retrieval of information.



Find the IP Address of a router

A router is often called the gateway and it has an IP address, IPV4 and sometimes IPv6 to identify and locate it on the network.

Find the Router Address on Windows

Carry out the following steps:

  1. Press the Windows Flag and R at the same time.  This brings up the Run window.
  2. Enter cmd. A DOS-style command window will appear.
  3. Enter Ipconfig at the command prompt.
  4. A list of information will now appear.
  5. The information you need is under Default Gateway.

Find the Router address on Mac

Carry out the following steps:

  1. Click on the Apple logo in the top-left corner than choose System Preferences
  2. Click on Network
  3. If you have a wired connection, the default gateway information will be displayed when you select Ethernet from the list
  4. If you have a WiFi connection:
    1. Click on the active network connection
    2. Click on Advanced on the information panel displayed
    3. Click on the TCP/IP tab on the next panel
    4. The router address is displayed next to Router.



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