A BGP handling bug caused significant internet routing instability on May 20th, 2025, due to unexpected behaviors in JunOS and Arista EOS implementations. A corrupt BGP Prefix-SID Attribute led to widespread shutdowns of internet-facing BGP sessions, affecting connectivity for numerous networks. The incident highlighted flaws in error handling and has implications for the robustness of internet infrastructure.
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What was the message?Who emitted the message?What is BGP Prefix-SID?Who was impacted?Vendors need to get their act togetherConclusionsSort: