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Date:      Thu, 06 Aug 2015 22:53:58 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 202144] Routing stops working when we create a new vlan
Message-ID:  <bug-202144-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202144

            Bug ID: 202144
           Summary: Routing stops working when we create a new vlan
           Product: Base System
           Version: 10.2-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: gondim@bsdinfo.com.br

Let me illustrate a network topology, to tell where the problem occurs:

PC station: 192.168.8.253/24 (FreeBSD 10.2-PRERELEASE)

Router: 192.168.8.177/24 and 10.254.215.1/24 (FreeBSD 10.2-RC2) 

router(CPE): 10.254.215.188/24 (a customer)

>From Router:
===========

# ifconfig vlan201
vlan201: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=103<RXCSUM,TXCSUM,TSO4>
        ether 70:71:bc:87:31:2d
        inet 10.254.215.1 netmask 0xffffff00 broadcast 10.254.215.255 
        inet6 fe80::7271:bcff:fe87:312d%vlan201 prefixlen 64 scopeid 0x1a 
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        media: Ethernet autoselect (1000baseT <full-duplex>)
        status: active
        vlan: 201 parent interface: em0

>From PC station (192.168.8.253):
===============================

# ping -c 5 10.254.215.188
PING 10.254.215.188 (10.254.215.188): 56 data bytes
64 bytes from 10.254.215.188: icmp_seq=0 ttl=127 time=1.012 ms
64 bytes from 10.254.215.188: icmp_seq=1 ttl=127 time=0.864 ms
64 bytes from 10.254.215.188: icmp_seq=2 ttl=127 time=1.084 ms
64 bytes from 10.254.215.188: icmp_seq=3 ttl=127 time=1.618 ms
64 bytes from 10.254.215.188: icmp_seq=4 ttl=127 time=1.006 ms

--- 10.254.215.188 ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.864/1.117/1.618/0.261 ms

It works perfectly.

Now I'm going on the router and I just create a new vlan 202.

>From Router:
===========

# ifconfig vlan202 create
#

At that moment my PC station stops to ping the IP 10.254.215.188.

>From PC station (192.168.8.253):
===============================

# ping -c 5 10.254.215.188 
PING 10.254.215.188 (10.254.215.188): 56 data bytes

--- 10.254.215.188 ping statistics ---
5 packets transmitted, 0 packets received, 100.0% packet loss

For all work again I need to restart the router.
I don't know if I could correctly explain the problem.

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