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Date:      Fri, 07 Aug 2015 00:09:56 -0300
From:      Marcelo Gondim <gondim@bsdinfo.com.br>
To:        Eric van Gyzen <vangyzen@FreeBSD.org>,  FreeBSD Stable Mailing List <freebsd-stable@freebsd.org>
Subject:   Re: Routing stops working when we create a new vlan
Message-ID:  <55C42184.1080403@bsdinfo.com.br>
In-Reply-To: <55C3F5BB.20506@FreeBSD.org>
References:  <55C3E641.9060305@bsdinfo.com.br> <55C3F5BB.20506@FreeBSD.org>

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On 06-08-2015 21:03, Eric van Gyzen wrote:
> On 8/6/15 5:57 PM, Marcelo Gondim wrote:
>> Hi all,
>>
>> 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.
>>
>> PR: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202144
>
> The output of "ifconfig" and "netstat -nr -f inet", before and after 
> you create the new vlan, would be most helpful.
>
> Eric
>
Hi Eric,

I put the information you requested in PR.

[]'s
Gondim



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