https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250552
Bug ID: 250552
Summary: [net] [fib] dangling route table entry after
destroying interface
Product: Base System
Version: 12.1-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
I'm testing FreeBSD's multiple FIBs feature. Dangling route table entry remains
when deleting ip address from interface after migrating the interface's fib
number. It looks weird.
This can be reproduced on FreeBSD 12.1 RELEASE-p10 and FreeBSD 12.2 RC2.
Steps to repeat:
On a system with net.fibs=4, Run the following commands:
# ifconfig tap0 create fib 1
# ifconfig tap0 inet 192.0.2.1/24
# netstat -rnf inet -F 1
Routing tables (fib: 1)
Internet:
Destination Gateway Flags Netif Expire
192.0.2.0/24 link#4 U tap0
192.0.2.1 link#4 UHS lo0
# ifconfig tap0 fib 2
# ifconfig tap0 inet 192.0.2.1/24 delete
# netstat -rnf inet -F 1
Routing tables (fib: 1)
Internet:
Destination Gateway Flags Netif Expire
192.0.2.1 link#4 UHS lo0
**** Notice the loopback route table entry 192.0.2.1 remains after deleting
address's of tap0. ****
# ifconfig tap0 destroy
# netstat -rnf inet -F 1
Routing tables (fib: 1)
Internet:
Destination Gateway Flags Netif Expire
192.0.2.1 link#4 UHS lo0
**** Notice again the loopback route table entry 192.0.2.1 remains after
destroying interface tap0. ****
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