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IETF RFC 4576
[ACTIVE]

Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs)

Metadata

Publisher
IETF
Doc Type
Standard
Pages
7
Abstract
This document specifies a procedure that deals with a particular issue that may arise when a Service Provider (SP) provides "BGP/MPLS IP VPN" service to a customer and the customer uses OSPFv2 to advertise its routes to the SP. In this situation, a Customer Edge (CE) Router and a Provider Edge (PE) Router are OSPF peers, and customer routes are sent via OSPFv2 from the CE to the PE. The customer routes are converted into BGP routes, and BGP carries them across the backbone to other PE routers. The routes are then converted back to OSPF routes sent via OSPF to other CE routers. As a result of this conversion, some of the information needed to prevent loops may be lost. A procedure is needed to ensure that once a route is sent from a PE to a CE, the route will be ignored by any PE that receives it back from a CE. This document specifies the necessary procedure, using one of the options bits in the LSA (Link State Advertisements) to indicate that an LSA has already been forwarded by a PE and should be ignored by any other PEs that see it. [STANDARDS-TRACK]
Publication Date
2006-06-01
Status Note
Proposed Standard
DOI
10.17487/RFC4576
Link
https://doi.org/10.17487/RFC4576
Author(s)
Eric C. Rosen
Peter Psenak
Padma Pillay-Esnault
Keyword(s)
Service Provider, Provider Edge, OSPF
Latest version of IETF RFC 4576

Document Versions — IETF RFC 4576

  • ▶ IETF RFC 4576 (2006-06-01)
    THIS DOC [ACTIVE] [LATEST VERSION]

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IETF RFC 4576, Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs). Available at https://doi.org/10.17487/RFC4576
Snippet:
IETF RFC 4576, Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs). Available at https://doi.org/10.17487/RFC4576

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IETF RFC 4576, Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs). Available at https://doi.org/10.17487/RFC4576
Snippet:
<span class="citation"><cite>IETF RFC 4576</cite>, Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs). Available at <a href="https://doi.org/10.17487/RFC4576" target="_blank" rel="noopener">https://doi.org/10.17487/RFC4576</a></span>

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Preview:
IETF RFC 4576, Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs)
doi: 10.17487/RFC4576
url: https://doi.org/10.17487/RFC4576
Snippet:
<li>
<cite id="bib-rfc4576">IETF RFC 4576</cite>, Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs)
<span class="doi">10.17487/RFC4576</span>
</li>

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