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Topic: BGP


Related Topics
EGP
WAN
WWE

In the News (Wed 3 Sep 14)

  
  RFC 1771 (rfc1771) - A Border Gateway Protocol 4 (BGP-4)
BGP Identifier: This 4-octet unsigned integer indicates the BGP Identifier of the sender.
Note that quite often BGP, as specified in RFC 1105, is referred to as BGP-1, BGP, as specified in RFC 1163, is referred to as BGP-2, BGP, as specified in RFC1267 is referred to as BGP-3, and BGP, as specified in this document is referred to as BGP-4.
When peering with a BGP implementation that does not compress multiple address prefixes into one message, it may be necessary to take steps to reduce the overhead from the flood of data received when a peer is acquired or a significant network topology change occurs.
www.faqs.org /rfcs/rfc1771.html   (14146 words)

  
  Border Gateway Protocol - Wikipedia, the free encyclopedia
BGP supports Classless Inter-Domain Routing and uses route aggregation to decrease the size of routing tables.
BGP was created to replace the EGP routing protocol to allow fully decentralized routing in order to allow the removal of the NSFNet Internet backbone network.
BGP neighbors, or peers, are established by manual configuration between routers to create a TCP session on port 179.
en.wikipedia.org /wiki/BGP   (1736 words)

  
 BGP
BGP is used for exchange of routing information between multiple transit autonomous systems as well as between transit and stub autonomous systems.
The BGP implementation expects external peers to be directly attached to a shared subnet, and expects those peers to advertise next hops which are host addresses on that subnet (though this constraint can be relaxed by configuration for testing).
For internal BGP group types (and for test groups), where possible a single outgoing message is built for all group peers based on the common policy.
www.unix.org.ua /gated/node33.html   (2977 words)

  
 [No title]
BGP version 2 removed from the protocol the concept of "up", "down", and "horizontal" relations between autonomous systems that were present in version 1.
BGP version 4 redefines the (previously class-based) network layer reachability portion of the updates to specify prefixes of arbitrary length in order to represent multiple classful networks in a single entry as discussed in [5].
BGP is used both for the exchange of routing information between a transit and a stub autonomous system, and for the exchange of routing information between multiple transit autonomous systems.
www.rfc-editor.org /rfc/rfc1773.txt   (2741 words)

  
 [No title]
BGP Topological Model When we say that a connection exists between two AS's, we mean two things: Physical connection: There is a shared Data Link subnetwork between the two AS's, and on this shared subnetwork each AS has at least one border gateway belonging to that AS.
BGP connection: There is a BGP session between BGP speakers in each of the AS's, and this session communicates those routes that can be used for specific destinations via the advertising AS.
For a given BGP speaker, some other BGP speaker with which the given speaker communicates is referred to as an external peer if the other speaker is in a different AS, while if the other speaker is in the same AS it is referred to as an internal peer.
www.rfc-editor.org /rfc/rfc1772.txt   (5590 words)

  
 [No title]
BGP Identifier: This 4-octet unsigned integer indicates the BGP Identifier of the sender.
A given BGP speaker shall apply the same jitter to each of these quantities regardless of the destinations to which the updates are being sent; that is, jitter will not be applied on a "per peer" basis.
When peering with a BGP implementation that does not compress multiple address prefixes into one message, it may be necessary to take steps to reduce the overhead from the flood of data received when a peer is acquired or a significant network topology change occurs.
www.ietf.org /rfc/rfc1771.txt   (14431 words)

  
 Border Gateway Protocol (BGP)
BGP is an exterior gateway protocol (EGP), which means that it performs routing between multiple autonomous systems or domains and exchanges routing and reachability information with other BGP systems.
BGP packets in which the type field in the header identifies the packet to be a BGP open message packet include the following fields.
BGP packets in which the type field in the header identifies the packet to be a BGP notification message packet include the following fields.
www.signaltonoise.net /library/bgp.html   (1850 words)

  
 What is BGP
BGP also is used to determine which router will serve as the connection point for specific external autonomous systems.
BGP Identifier---Provides the BGP identifier of the sender (an IP address), which is determined at startup and is identical for all local interfaces and all BGP peers.
BGP packets in which the type field in the header identifies the packet to be a BGP update message packet include the following fields.
www.pulsewan.com /data101/bgp_basics.htm   (1753 words)

  
 Border Gateway Protocol (BGP)
BGP is a very robust and scalable routing protocol, as evidenced by the fact that BGP is the routing protocol employed on the Internet.
BGP neighbors exchange full routing information when the TCP connection between neighbors is first established.
This is the mechanism that BGP uses to detect routing loops.
www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/bgp.htm   (1802 words)

  
 IP Routing Primer: Part Five | Full Story | December 4, 2000   (Site not responding. Last check: 2007-10-10)
BGP is the only widely implemented EGP (Exterior Gateway Protocol) and the only routing protocol used to link networks to one another on the Internet.
BGP is a Path Vector Protocol, which is similar to a Distance Vector Protocol, but with a key difference.
BGP routing can also be controlled through the community attribute that puts a predefined code on a group or community of routes so the receiving router takes a predefined action based on the value of that code.
www.networkcomputing.com /netdesign/1124iprpart5.html   (1713 words)

  
 O'Reilly Media -- Bookstore: BGP
BGP is the only protocol that is designed to deal with a network of the Internet's size, and the only protocol that can deal well with having multiple connections to unrelated routing domains.
BGP is for anyone interested in creating reliable connectivity to the Internet.
We were planning to deploy BGP, this book has helped me with the concepts required to deploy BGP with confidence.
www.oreilly.com /catalog/bgp   (497 words)

  
 BGP-4 Protocol Overview   (Site not responding. Last check: 2007-10-10)
BGP's basic unit of routing information is the BGP path, a route to a certain set of CIDR prefixes.
Conversely, as a BGP path advertisement is passed among BGP speakers in the same AS, the NEXT_HOP attribute is left untouched.
When a BGP routing update is received from a neighboring AS, it must be relayed directly to all other BGP speakers in the AS.
www.freesoft.org /CIE/Topics/88.htm   (611 words)

  
 Border Gateway Protocol (BGP)
BGP is a path vector protocol, a modified form of distance vector protocol.
BGP speakers within a single AS must be fully meshed.
A BGP speaker shall calculate the degree of preference for each external route based on the locally configured policy, and include the degree of preference when advertising a route to its internal peers.
www.estoile.com /links/bgp4.htm   (781 words)

  
 Amazon.de: BGP.: English Books: Peter I. VanBeijnum   (Site not responding. Last check: 2007-10-10)
BGP explores the capabilities and limitations of this exquisitely important protocol with an eye to teaching network engineers how to build systems that are faster, less costly, and more survivable than ever before.
BGP is the onl y protocol that is designed to deal with a network of the Internet's size, and the only protocol that can deal well with having multiple connections to unrelated routing doma ins.
BGP is for anyone interested in creating reliable connectivity to the Internet.
www.amazon.de /BGP-Peter-I-VanBeijnum/dp/0596002548   (535 words)

  
 Cisco Security Advisory: Cisco IOS Misformed BGP Packet Causes Reload
BGP runs over the Transport Control Protocol (TCP), a reliable transport protocol which requires a valid three way handshake before any further messages will be accepted.
The Cisco IOS implementation of BGP requires the explicit definition of a neighbor before a connection can be established, and traffic must appear to come from that neighbor.
The BGP updates, however, will not be processed until either the same secret is configured on both devices or the secret is removed from both devices.
www.cisco.com /warp/public/707/cisco-sa-20050126-bgp.shtml   (2033 words)

  
 GNU Zebra -- bgpd
BGP protocol uses the AS number for detecting the BGP connection is internal one or external one.
BGP version 4 is the default value used for BGP peering.
BGP view is almost same as normal BGP process without the result of route selection does not go to the kernel routing table.
manticore.2y.net /doc/zebra/bgpd.html   (1531 words)

  
 What is BGP? - a definition from Whatis.com - see also: Border Gateway Protocol
BGP is often the protocol used between gateway hosts on the Internet.
Hosts using BGP communicate using the Transmission Control Protocol (TCP) and send updated router table information only when one host has detected a change.
BGP is a more recent protocol than the Exterior Gateway Protocol (EGP).
searchsmb.techtarget.com /sDefinition/0,,sid44_gci213813,00.html   (348 words)

  
 BGP, Border Gateway Protocol   (Site not responding. Last check: 2007-10-10)
The COMMUNITIES path attribute may be used with BGP version 2 and all subsequent versions of BGP unless specifically noted otherwise.
All routes received carrying a communities attribute containing this value MUST NOT be advertised outside a BGP confederation boundary (a stand-alone autonomous system that is not part of a confederation should be considered a confederation itself).
This is an advisory qualification to readvertisement of a route prefix, permitting an AS not to readvertise the route prefix to all external bilateral peer neighbour AS's.
www.networksorcery.com /enp/protocol/bgp.htm   (761 words)

  
 Secure BGP
BGP is a critical component of the Internet's routing infrastructure.
However, it is highly vulnerable to a variety of attacks due to the lack of a scalable means of verifying the authenticity and authorization of BGP control traffic.
Third, IPsec is used to provide data and partial sequence integrity, and to enable BGP routers to authenticate each other for exchanges of BGP control traffic.
www.net-tech.bbn.com /sbgp/sbgp-index.html   (930 words)

  
 AS4637 - BGP Table Statistics
The RIB/FIB ratio is a function of the number of BGP peering sessions at the sample point.
The total span of address space advertised in the BGP table, and the relationship of this value to the number and size of address prefix objects in the table.
Compares the current BGP Table with the previous table and reports on the number of changes in the FIB.
bgp.potaroo.net /as4637   (352 words)

  
 What is BGP? - A Word Definition From the Webopedia Computer Dictionary
Short for Border Gateway Protocol, an exterior gateway routing protocol that enables groups of routers (called autonomous systems) to share routing information so that efficient, loop-free routes can be established.
BGP is commonly used within and between Internet Service Providers (ISPs).
Links to BGP standards documents (RFCs) as well as white papers and configuration information.
www.webopedia.com /TERM/B/BGP.html   (116 words)

  
 Understanding BGP misconfiguration   (Site not responding. Last check: 2007-10-10)
Yet little is known about the frequency of misconfiguration or its causes, except for the few spectacular incidents of widespread outages.
In this paper, we present the first quantitative study of BGP misconfiguration.
Surprisingly, we find that configuration errors are pervasive, with 200-1200 prefixes (0.2-1.0\% of the BGP table size) suffering from misconfiguration each day.
www.cs.washington.edu /homes/ratul/bgp   (214 words)

  
 MikroTik RouterOS V2.6 Border Gateway Protocol (BGP) Routing Protocol   (Site not responding. Last check: 2007-10-10)
The BGP feature is included in the bgp package.
For BGP description and implementation guidelines please refer to the readings mentioned in the list of Additional Resources.
The BGP management can be accessed under the /routing bgp submenu.
www.mikrotik.com /Documentation/manual_2.6/Routing/BGP.html   (769 words)

  
 [No title]
Value Name Reference ----- -------------- --------- 1 OPEN [RFC4271] 2 UPDATE [RFC4271] 3 NOTIFICATION [RFC4271] 4 KEEPALIVE [RFC4271] 5 ROUTE-REFRESH [RFC2918] BGP Path Attributes - per [RFC4271] Registration Procedures: Assignments are made using either the Standards Action process or the Early IANA Allocation process.
[RFC1998] Bates, T., Chandra, R, "BGP Route Reflection An alternative to full mesh IBGP", RFC 1998, June 1996.
[RFC4486] E. Chen and V. Gillet, "Subcodes for BGP Cease Notification Message", RFC 4486, April 2006.
www.iana.org /assignments/bgp-parameters   (239 words)

  
 Amazon.com: BGP: Books: Iljitsch Van Beijnum   (Site not responding. Last check: 2007-10-10)
So unless you work in such an environment or want to their may not be anything of immediate interest for you in it.
There are a lot of detailed explanations of all the components that make up BGP both from the perspective of a network that wants to use BGP and from the perspective of an ISP.
The author's approach is clear and simple, it capture the attention of a Cisco Professionals who already knows BGP from the Training Courses or from the lenghty and boring Routing TCP/IP Volume II of CiscoPress.
www.amazon.com /BGP-Iljitsch-Van-Beijnum/dp/0596002548   (1828 words)

  
 Secure BGP
BGP is a critical component of the Internet's routing infrastructure.
However, it is highly vulnerable to a variety of attacks due to the lack of a scalable means of verifying the authenticity and authorization of BGP control traffic.
Third, IPsec is used to provide data and partial sequence integrity, and to enable BGP routers to authenticate each other for exchanges of BGP control traffic.
www.ir.bbn.com /sbgp   (930 words)

  
 ONLamp.com -- Traffic Engineering: Queuing, Traffic Shaping, and Policing   (Site not responding. Last check: 2007-10-10)
In this fourth installment on Traffic Engineering, excerpted from O'Reilly's BGP, learn how to balance incoming traffic by announcing more specific routes.
In this second installment on Traffic Engineering, excerpted from O'Reilly's BGP, learn how to influence the BGP path-selection process.
In this first installment on Traffic Engineering, excerpted from O'Reilly's BGP, learn how to find the best route in a multihomed setup--the one that will take advantage of all available bandwidth.
www.onlamp.com /pub/a/onlamp/excerpt/bgp_ch06/index5.html   (1886 words)

  
 bgp.bg / Buy and sell Bulgarian Properties – off-plan apartments, chalets, rural houses, villas
Originally built in 1965, this house is completely renovated in order to be brought up to the standards and converted into a nice holiday home.
BGP has a great opportunity for investors or for anyone who wants to own a property in one of the most exclusive places on the Black sea coast – Kavarna town.
BGP Services Ltd. registered a great success during the 12th edition of REALTEX...
www.bgp.bg   (2414 words)

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