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&lt;p class="std-text">Matching a single origin ASN on SROS now demands 700 policy terms because as-path-group limits cap at just 128 lines. We must abandon legacy regular expression matching for &lt;strong>tree lookup architectures&lt;/strong> to survive the scaling collapse of modern routing tables. &lt;strong>AS-SET objects&lt;/strong> replace brittle regex chains, a shift validated by Jakob Heitz&amp;#039;s demonstration of origin matching on IOS-XR. The strategic necessity of migrating toward &lt;strong>million-line prefix-lists&lt;/strong> is no longer theoretical; Cisco Live 2026 data confirms AI agents generate 450% more traffic per task than humans, forcing this hand.&lt;/p></description></item></channel></rss>