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IETF RFC 9494
[ACTIVE]

Long-Lived Graceful Restart for BGP

Metadata

Publisher
IETF
Doc Type
Standard
Pages
20
Abstract
This document introduces a BGP capability called the "Long-Lived Graceful Restart Capability" (or "LLGR Capability"). The benefit of this capability is that stale routes can be retained for a longer time upon session failure than is provided for by BGP Graceful Restart (as described in RFC 4724). A well-known BGP community called "LLGR_STALE" is introduced for marking stale routes retained for a longer time. A second well-known BGP community called "NO_LLGR" is introduced for marking routes for which these procedures should not be applied. We also specify that such long-lived stale routes be treated as the least preferred and that their advertisements be limited to BGP speakers that have advertised the capability. Use of this extension is not advisable in all cases, and we provide guidelines to help determine if it is. This memo updates RFC 6368 by specifying that the LLGR_STALE community must be propagated into, or out of, the path attributes exchanged between the Provider Edge (PE) and Customer Edge (CE) routers.
Publication Date
2023-11-01
Status Note
Proposed Standard
DOI
10.17487/RFC9494
Link
https://doi.org/10.17487/RFC9494
Author(s)
Jim Uttaro
Enke Chen
Bruno Decraene
John Scudder
Latest version of IETF RFC 9494

Document Versions — IETF RFC 9494

  • ▶ IETF RFC 9494 (2023-11-01)
    THIS DOC [ACTIVE] [LATEST VERSION]

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Amends:
IETF RFC 6368 [Active*]

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IETF RFC 9494, Long-Lived Graceful Restart for BGP. Available at https://doi.org/10.17487/RFC9494
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IETF RFC 9494, Long-Lived Graceful Restart for BGP. Available at https://doi.org/10.17487/RFC9494

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IETF RFC 9494, Long-Lived Graceful Restart for BGP. Available at https://doi.org/10.17487/RFC9494
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<span class="citation"><cite>IETF RFC 9494</cite>, Long-Lived Graceful Restart for BGP. Available at <a href="https://doi.org/10.17487/RFC9494" target="_blank" rel="noopener">https://doi.org/10.17487/RFC9494</a></span>

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IETF RFC 9494, Long-Lived Graceful Restart for BGP
doi: 10.17487/RFC9494
url: https://doi.org/10.17487/RFC9494
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<cite id="bib-rfc9494">IETF RFC 9494</cite>, Long-Lived Graceful Restart for BGP
<span class="doi">10.17487/RFC9494</span>
</li>