| What is an IP address? | |
| How can I plan my network to use less IP addresses? | |
| How do I subnet the network EMBARQ provided me? | |
| How do I request IP address space from EMBARQ? | |
| What is BGP? | |
Thank you for asking, since IP numbers are being rapidly exhausted, it is more difficult to obtain IP addresses from the American Registry for Internet Numbers (ARIN). ARIN now requires extensive documentation for new IP address allocations. Only with valid justification can anyone obtain a partial, full or multiple Class C networks. Fortunately, the need for more IP numbers can be avoided, if you are simply providing web hosting services. In addition there are several technologies which allow you to conserve IP address space for WAN (Wide Area Networks) and LAN (Local Area Networks) as well. Please see the resources provided below. You can also find additional information using your favorite search engine and entering in the appropriate topic.
How can I plan my network to use less IP addresses?
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Address Allocation for Private Internets [Question list] |
2. |
Configuring Network Address Translation HTML or PDF |
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Virtual Web Hosting Virtual web hosting let's you assign any number of Virtual Hosts to the same IP number. You can have www.domain1.com and www.domain2.com both use the same IP number without changing how each site is reached through the Internet. [Question list] |
How do I subnet the network EMBARQ provided me?
IP Addressing and subnetting HTML or PDF
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How do I request IP address space from EMBARQ?
EMBARQ will provide IP address space to downstream, directly connected Internet customers. In accordance with the guidelines set forth from The American Registry of Internet Numbers (ARIN), EMBARQ will issue the smallest network which will provide you with the appropriate number of IP addresses to build your network. Currently the default assignment is a /29 network (6 usable IP addresses).
Because the number of available IP addresses on the Internet is limited, many factors must be considered in the determination of address space allocations. Therefore, IP address space is allocated to downstream customers using a slow-start model. Allocations are based on justified need, not solely on a predicted customer base.
If you require address space longer than a /20 (16 Class C Networks) or more, you should request your networks directly from ARIN.
In requesting the IP address space you must provide EMBARQ sufficient justification in the form of detailed documentation of network plans, and justification for use of all IP addresses, including previously assigned networks.
Customers must complete a IP REQUEST FORM. There are documents for ISPs (Organizations who provide IP services for other individuals or companies) and End Users (Organizations who only provide in house IP services).
IP requests will be processed within 96 business hours of reciept. This time many vary due to number of other IP requests recieved in addition to recieving sufficient justification and utilization documentation. If you need assistance in completing the EMBARQ Regional Dedicated IP form please call our IP services support team at 1.800.603.8044 Options 1,1.
EMBARQ will submit the proper Shared WhoIs Project (SWIP) documentation based on information provided by the IP Services subscriber, their sales representative or other entity representing said IP services subscriber. Once a SWIP registration is submitted the ORG ID becomes the responsibility of the IP Services subscriber for whom it was submitted. SWIP submissions can be viewed in ARIN's WhoIs database.
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What is BGP?
BGP (Border Gateway Protocol) is the current Internet standard for interdomain AS (Autonomous System) exterior routing. BGP4 allows traffic to use the best path available at the time of transmitting and recieving data. The current version in use is BGP4, which is based on RFC 1771, it provides intellegent route based selection on the most specific prefix and shortest AS path. BGP4 supports Classless Interdomain routing.
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BASIC REQUIREMENTS:
| You must be multi-homed to run BGP with at least a full T1 of bandwidth to both providers. | |
| You must have an (Autonomous System) AS number from ARIN. ASN Request template. | |
| You must have a class C network to announce, unless you run private BGP peering with EMBARQ. | |
| You must be capable of configuring your BGP session. EMBARQ can provide BGP configuration at a time and material rate. Please contact your sales representative for pricing. | |
| The customer will NOT allow unfiltered redistribution from interior routing into the BGP session. | |
| Explicit distribute-list, or network statements should be used to prevent injections of invalid routes into global tables. | |
| NO redistribution of BGP routes can be allowed into customer's interior routing protocols, as it corrupts AS-path information. | |
| The customer has to establish as-path filters, which will aid in preventing leakage of routing information from our customer's alternate Internet access provider to EMBARQ and vice versa. Filters should be inclusive, rather than exclusive (i.e. they should list customer AS-es instead of excluding other provider's AS-es). | |
| IP blocks for several specific routes should be aggregated into larger routes as much as possible. | |
| Networks listed in the BGP configuration should be sane (i.e. no networks assigned to other customers, subnets should never be announced outside, etc). [Question list] |
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| RESTRICTIONS: | |
| EMBARQ will not run EBGP Multi-hop except for load balancing purposes between the loopback addresses of the Customer and EMBARQ routers that share multiple serial connections. | |
| EMBARQ reserves the right to aggregate any announcement for a network smaller than /19 when advertising to external peers such as AT&T, UUnet etc. | |
| Customers will not be permitted to use '*' wildcards in their requested route filters. | |
WHAT TO EXPECT
CONVERSION FROM STATIC ROUTING
To change from static routing to BGP, complete and submit a BGP ROUTING REQUEST FORM. Upon successful submission you will receive a confirmation ticket number and a copy sent to your contact e-mail address. EMBARQ Engineers will configure the Internet Access router where your circuit terminates. The static routes will not be removed at this time.
MODIFICATIONS
Any time a modification need to be made to your BGP session (AS path filter or the IP filter), the BGP UPDATE REQUEST FORM should be submitted. Upon successful submission you will receive a confirmation ticket number and a copy sent to your contact e-mail address. EMBARQ will take action on all requests within 3-4 business days of recieving the request.
WHAT YOU CAN CONTROL
AS-PATH PREPENDS
If you request an AS based filter, EMBARQ automatically sets the filter to allow you to prepend your AS as much as you like to control the preference of your routes as advertised to the Internet. If you request an IP based filter, you can prepend your network without any special request or special configuration on the EMBARQ side.
METRICS
You can control the metric that is assigned to your announcements on the BGP session.
LOCAL PREFERENCE
You can set up local preferences on your incoming announcements to prefer a provider to a specific location. Filters can be IP or AS-path based filters. Recall, the default value for local-preference is 100 and the information is shared with all your IBGP neighbors.
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