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| | Border Gateway Protocol - Wikipedia, the free encyclopedia |
 | | RFC 4271, A Border Gateway Protocol 4 (BGP-4) (obsoletes: RFC 1771) | | | The current version of BGP, BGP version 4, is specified in request for comment RFC 4271 (as per Jan 2006). | | | BGP neighbours, or peers, are established by manual configuration between routers to create a TCP session on port 179, BGP speaker will periodically, every 60 seconds by default, send 19-byte keepalive messages to maintain the connection. |
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http://en.wikipedia.org/wiki/Border_Gateway_Protocol
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| | RFC 1771 (rfc1771) - A Border Gateway Protocol 4 (BGP-4) |
| | 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. | | | If the route is learned from a BGP speaker in the local autonomous system, either the value of the LOCAL_PREF attribute shall be taken as the degree of preference, or the local system shall compute the degree of preference of the route based on preconfigured policy information. | | | Whenever an authentication mechanism is specified for use within BGP, three things must be included in the specification: - the value of the Authentication Code which indicates use of the mechanism, - the form and meaning of the Authentication Data, and - the algorithm for computing values of Marker fields. |
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http://www.faqs.org/rfcs/rfc1771.html
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| | Border Gateway Protocol (BGP) |
| | When BGP is used between autonomous systems (AS), the protocol is referred to as External BGP (EBGP). | | | Q—Assume that a BGP router is learning the same route from two different EBGP peers. | | | If the local preferences are the same, prefer the path that was originated by BGP running on this router. |
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http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/bgp.htm
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| | TCP / IP Protocols - AH ESP TLS BGP-4 EGP EIGRP GRE HSRP IGRP |
| | One such encapsulated protocol, the TLS Handshake Protocol, allows the server and client to authenticate each other and to negotiate an encryption algorithm and cryptographic keys before the application protocol transmits or receives its first byte of data. | | | In particular, the protocol protects against the failure of the first hop router when the source host cannot learn the IP address of the first hop router dynamically. | | | The Internet Assigned Numbers Authority has assigned Protocol Number 50 to ESP. The header immediately preceding an ESP header will always contain the value 50 in its Next Header (IPv6) or Protocol (IPv4) field. |
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http://www.protocols.com/pbook/tcpip5.htm
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| | Resource Reservation Aggregation |
| | To reduce the protocol message traffic, routers may reserve domain bandwidth beyond the current load, so that sources can join or leave the tree or change their reservation without having to send messages all the way to the tree root for every such change. | | | In case of paths of equal weight, current BGP practice dictates that the router forward all packets over only one path. | | | In today's Internet, all unicast routing algorithms, including OSPF, RIP and BGP, define sink-based trees, one for each destination. |
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http://www.cs.columbia.edu/~pingpan/projects/bgrp.html
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| | Border Gateway Protocol |
| | You can see the details of this networks bgp attributes in the show ip bgp output, the details of the routing information in the show ip route output and an overview of the BGP information in the second show ip bgp. | | | cisco#show ip bgp reg _7224$ BGP table version is 357084193, local router ID is 209.43.147.112 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? | | | I generally use a BGP community mechanism in addition to simple AS-PATH filters (or instead of, in more complex installations). |
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http://www.cyberflunk.com/~nikm/cisco/bgp.html
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| | Joe's BGP Page |
| | Send me any suggestions on new additions or broken links... | | | Tutorial in multi-homing with BGP on a Cisco |
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http://joe.lindsay.net/bgp.html
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