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Do external BGP (eBGP) sessions between confederations modify the next hop?

April 26, 2017BGP Confederations ebgp external hop sessions

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Do external BGP (eBGP) sessions between confederations modify the next hop?

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A. No, eBGP sessions between confederation sub-ASes do not modify the next hop attribute. All iBGP rules still apply to have the whole AS behave as a single entity. The metric and local preference values also remain unaltered among confederation eBGP peers. Refer to the BGP Confederation section of BGP Case Studies for more information about confederations.