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andrewcsaenger
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C9500-40X IOS-XE 17.15.5 — Inter-VLAN PIM Sparse Mode MFIB Permanently

06-16-2026
Platform: Cisco Catalyst C9500-40X, IOS-XE 17.15.5 (also reproduced on 17.9.4a)Issue: Inter-VLAN multicast routing fails. The MFIB hardware entry permanently shows NS (Negate Signalling) on the destination SVI OIF, resulting in zero packets forwarded...
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Member Since ‎03-18-2025 05:40 PM
Date Last Visited ‎07-23-2026 08:39 AM
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