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Cisco Bug: CSCta27671 - Change in NET_NOREDIST flag processed incorrectly by RIP

Last Modified

Feb 28, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

12.2(33)XNE 12.2(33.1.19)XNE 12.2(33.1.6)MCP6 12.2(33.1.7)MCP5 12.2(33.2.6)XNE1 12.2(33.4.9)SRE 12.2REC 15.1(0.9)T

Description (partial)

If the NET_NOREDIST flag is set on a route which currently exists in the RIB, a ROUTE_DOWN event will be signaled to any protocols which had previously received redistribution ROUTE_UP/MODIFY events for that route.
RIP does not properly process this notification- it does a lookup in the RIB, finds the route with a valid next hop, and incorrectly ignores the ROUTE_DOWN event.

Redistribute a route from EBGP and then redistribute the same route from IBGP peer with better bgp attribute so that BGP best path algorithm installs IBGP learned route in RIB.
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