Cisco Bug: CSCsz87710 - RPF enabled by default on a newly created SVI
Feb 15, 2018
- Cisco IOS
Known Affected Releases
Symptoms: The RPF is enabled by default on a newly created SVI/loopback interface, which is causing ping failure. See the following example: switch(config)#int vlan 1103 switch(config-if)#mtu 9216 switch(config-if)#ip add switch(config-if)#ip address 172.16.2.1 255.255.255.0 switch(config-if)# logging event link-status switch(config-if)# mpls ip switch(config-if)#no sh switc#sh ip interface vlan 1103 Vlan1103 is up, line protocol is up Internet address is 172.16.2.1/24 ::: :::::::: ::::::::::::::::::::::: BGP Policy Mapping is disabled Input features: uRPF, MCI Check <<<<<<<<<< RPF is enabled by default Output features: IP Post Routing Processing, HW Shortcut Installation Post encapsulation features: MTU Processing, IP Protocol Output Counter, IP Sendself Check, HW Shortcut Installation Router#ping 172.16.2.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.2.1, timeout is 2 seconds: ..... Success rate is 0 percent (0/5) Conditions: This symptom occurs when RPF is enabled on the interface for the first time. Delete the interface. Create the interface again with the same name.
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