https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278654
Bug ID: 278654
Summary: The -ifa modifier to route(8) is ineffective
Product: Base System
Version: 14.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
In 14.0 and -current as of this bug report, the -ifa modifier to route(8) has
no effect. For example, if 10.0.3.99 is an alias on vtnet0 or lo0, and a route
is added via vtnet0 with -ifa 10.0.3.99, ping to that destination uses the
primary address on vtnet0 as source. route get shows no indication of the ifa
address. ping -S 10.0.3.99 works as expected.
Details (this example from -current):
vmguest1# ifconfig lo0 alias 10.0.3.99/32
vmguest1# netstat -rnf inet
Routing tables
Internet:
Destination Gateway Flags Netif Expire
default 10.0.3.254 UGS vtnet0
10.0.3.0/24 link#1 U vtnet0
10.0.3.1 link#2 UHS lo0
10.0.3.99 link#2 UH lo0
127.0.0.1 link#2 UH lo0
vmguest1# route add freebsd-test -ifa 10.0.3.99 -ifp 10.0.3.1 10.0.3.254
add host freebsd-test: gateway 10.0.3.254
vmguest1# route -n get freebsd-test
route to: 10.0.2.21
destination: 10.0.2.21
gateway: 10.0.3.254
fib: 0
interface: vtnet0
flags: <UP,GATEWAY,HOST,DONE,STATIC>
recvpipe sendpipe ssthresh rtt,msec mtu weight expire
0 0 0 0 1500 1 0
vmguest1# route delete freebsd-test
delete host freebsd-test
vmguest1# route add freebsd-test -ifa 10.0.3.99 -ifp 10.0.3.1 10.0.3.254
add host freebsd-test: gateway 10.0.3.254
vmguest1# route -nv get freebsd-test
route to: 10.0.2.21
destination: 10.0.2.21
gateway: 10.0.3.254
fib: 0
interface: vtnet0
flags: <UP,GATEWAY,HOST,DONE,STATIC>
recvpipe sendpipe ssthresh rtt,msec mtu weight expire
0 0 0 0 1500 1 0
ping 10.0.2.21 then uses a source address of 10.0.3.1. The result is the same
if the alias is placed on vtnet0.
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