Introduction and Background
Bay Area Internet Solutions is bound by the policies of the IANA and ARIN with respect to IP address allocation
and routing of those IP addresses due to the diminishing number of available IPv4 addresses (32-bit
addressing). In order to efficiently allocate IP addresses, the policies outlined in the Internet
Registry IP Allocation Guidelines are followed stringently by ARIN and other
registration authorities that control the process. As a result, all Bay Area Internet
Solution customers have to follow the said policy:
All Bay Area Internet Solutions customers are assigned non-portable IP addresses(can
not be transferred away ) out of the CIDR blocks that are assigned to Bay Area Internet
Solutions by ARIN or upstream providers. Bay Area Internet Solutions reserves the right to
renumber or revoke a customer's allocation at any time with prior notice of at least 30
days.
ISDN and Analog Dialup Customers
All single-user dialup customers are assigned an IP address dynamically each time they
connect to Bay Area Internet Solutions. If a static IP address is required, one will be
provided if requested if it is needed for the purpose of allowing access to a firewall or
other related services.
Co-located Customers
Each Co-located server is allocated one IP address. Customers may request additional IP
addresses (as specified in "Additional Address Space" below).
Additional Address Space
Dedicated line, ADSL, ISDN that require more than one IP address can choose an IP
allocation package from the following table:
| IPs |
Subnet |
Price per Month |
| 1 |
/32 |
free |
| 2 |
/30 |
** |
| 6 |
/29 |
** |
| 14 |
/28 |
** |
| 30 |
/27 |
** |
| 62* |
/26 |
** |
| 126* |
/25 |
** |
| 254* |
/24 |
** |
*For more than 30
IPs, customers will need to submit a
justification plan as detailed under "Requesting more Address Space from Bay
Area Internet Solution" below.
** Additional monthly cost may apply depending on account
type, consult an account representative.
Although we encourage and support our customers in the expansion of their networks, we
have to examine all requests for IP-address space with care before assigning more
addresses. We will assign addresses to customers who genuinely require them, however, we
will request customers to re-design their networks if we feel that the current range of
addresses is sufficient for customer requirements.
Before requesting additional address space, please review the following options:
Options
If you wish to have more IP address space, please consider the use of DHCP and/or private
addressing. The following questions might prove helpful:
- Will you be using a firewall with Network Address Translation (NAT)?
A firewall or similar means of restricting access to and from machines connected to an
internal LAN that do not require globally routable IP addresses could allow the customer
to use a RFC-1918 specified private network (see [RFC
1918] Y. Rekhter, B. Moskowitz, D. Karrenberg, G.J. de Groot, E. Lear, "Address
Allocation for Private Internets").
If you use private addressing, the Bay Area Internet Solutions assigned block of
globally routable IP addresses may be used by the customer for the router, firewall, and
public servers (E-Mail, WWW, FTP, etc.) which need to be reachable from the outside world.
Many routers and Firewall/Proxy servers can use network address translation to allow
client machines that need access to the outside, to do so transparently.
- Do you have client machines that do not need a fixed IP address?
You might be able to use DHCP, a method of dynamically assigning IP addresses to hosts. If
you have hosts that are not in use all the time, you can use DHCP to allocate addresses to
those machines on a need basis. For further information, please take a look at some of the
following:
- Do you have an existing net block, either from another provider or from the ARIN
directly?
Customers who have existing IP address blocks smaller than a /19 with previous providers
or independently with the ARIN will be requested to re-number within the Bay Area Internet
Solutions CIDR (Classless Internet Domain Routing) blocks.
Customers who have a block with a mask prefix of /19 or smaller (32 or more contiguous
Class Cs) CIDR range should inform Bay Area Internet Solutions before line installation.
Bay Area Internet Solutions will not announce CIDR blocks longer than a /19 due to ISP Filter Policies which are
designed to prevent an explosion of the global routing table. You can monitor the size of
the global Internet routing table from the Routing Table
History taken from the Weekly CIDR Report.
For more information, please see: CIDR
FAQ - Explanation of CIDR notation and usage [RFC1518] Y. Rekhter, T. Li, An Architecture
for IP Address Allocation with CIDR [RFC1817] CIDR and Classful Routing
Requesting more Address Space from Bay Area Internet Solutions
If you will still need more IP addresses from Bay Area Internet Solutions, please ensure
you meet the following requirements and provide answers to the relevant questions via
email.
In order for Bay Area Internet Solutions to obtain more IP addresses from
ARIN, we have
to satisfy at least the following requirements:
- Inverse addressing in place for all current addresses
- At least 60% usage of our current IP address allocation
- Effective and efficient use of existing allocation
as determined by the registering authorities. Bay Area Internet Solutions follows the
same guidelines before assigning more IP addresses to our customers.
- Inverse DNS must be in place for existing hosts showing at least 60% utilization of
current address block.
Bay Area Internet Solutions requires that you have inverse addressing in place for
all of your hosts. Inverse addressing will not only make our network run smoother, but
will help the performance on your line as well. Many ftp and web servers look for an
inverse address for your host before allowing you to access them.
If you maintain your own DNS with Bay Area Internet Solutions acting as a
"silent" secondary, please make sure that your tables are up to date. If Bay
Area Internet Solutions acts as your primary DNS, make sure that you inform us of any
additions or changes you make to the number of machines that are addressable via DNS.
For more information, please see RFC
1293
- Hosts listed must respond to ping
(ICMP Echo).
Bay Area Internet Solutions requires that you use 60% of the IP addresses that are
already allocated to you. This prevents people from unknowingly wasting IP addresses. Bay
Area Internet Solutions defines using an address as being able to see that the machine
connected to that address is alive. We do this by using the ping utility.
- How many Internet accessible hosts do you have today; will you in the next 3 months, and
in the next year? It is on these numbers that Bay Area Internet Solutions bases
address assignments.
If you are requesting a new block of addresses for the purpose of creating two separate
networks, we suggest that you subnet your existing block of IP addresses first, if this is
possible. For some more information on subnetting, please refer to the following sources:
All requests for network address assignment should be accompanied by a network map. Bay
Area Internet Solutions will assign the appropriate size CIDR block to the customer based
on this map. In making the assignment Bay Area Internet Solutions may suggest
alternate means of network design to conserve address space based on the network map
provided.
The network map will usually consist of a drawn representation of what your network looks
like. The following should be shown on your network map:
The number of hosts and their placement relative to any routers, bridges, or
filters/firewalls. Any existing and planned subnetting. Planned network segments should be
clearly marked as "expansion areas". Do you use DHCP? where? Do you use Address
Translation on your internal networks? where? Firewalls, especially proxy firewalls
Dial-Up Ports (how many do you have?)
A simple diagram accounting for your presently assigned IP address space is essential.
Every IP address currently allocated to you must be represented in some fashion.
Also represented on this map should be your future expansion plans. Bay Area Internet
Solutions would like to know what you plan to do with your future allocations. We
use this map to help determine the allocation we will give you now and reserve for your
future use.
Some examples of an incorrect and correct network maps are:
Incorrect:
Router 1 computer, 2 PCs, printer
Empty Cube, My Cube Pentium,
Networked printer.
Incorrect:
bayarea.net router ---our network
Correct:
Bayarea.net <--> Router <--> Open
network
|20 workstations running DHCP
|Web server, Mail server, News server, /28
|Planned expansion: 20 more hosts.
|
+---Dialin Pool, 12 lines, /28
|Planned expansion: 16 lines
|
|
Proxy Firewall
|
|
+---Private network, numbered out of
10.0.0.0/8
Conclusion
After review of the network map and confirmation of your network utilization Bay Area
Internet Solutions will consider making additional address assignments.
Bay Area Internet Solutions will provide the customer with as many addresses as needed
to operate on the Internet. The customer is expected to utilize these addresses
effectively and not simply based on convenience. All requests for a change in a customers
IP allocation should be sent to support@bayarea.net with the necessary documentation as
specified above.
