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Cisco Bug: CSCul38883 - MVPN: RPFID of core route and vrf route don't match

Last Modified

Nov 06, 2019

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

4.1.0.MCAST 5.2.0.BASE

Description (partial)

Traffic is dropped on Egress MVPN PE, due to RPF failure. The RPF interface is set correctly in MFIB as an MDT interface, but the RPF-ID on the (*,G) or (*,G/m) route is incorrect. The RPF-ID should match with the one programmed on the core PIM route or LSP Label, but that is not the case here.

With PIM Sparse mode, this issue can happen if there are RP-mappings learnt/installed for a /32 (IPv4) or /128 (IPv6) Group range. The active group ranges can be found in "show pim vrf <> [ipv4|ipv6] group-map".

The issue can also happen for (*,G/m) routes if Bidir RP mappings are present in an MVPN.
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