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Date:      Tue, 29 Jan 2008 14:42:39 -0200
From:      "Alexandre Biancalana" <biancalana@gmail.com>
To:        "Tom Judge" <tom@tomjudge.com>
Cc:        freebsd-net@freebsd.org
Subject:   Re: VLAN problems
Message-ID:  <8e10486b0801290842l5d65bb3fk8a02d731c3ad1b91@mail.gmail.com>
In-Reply-To: <479F4C3C.5070801@tomjudge.com>
References:  <8e10486b0801290439y77568aeby6c6dbfbb5132f61d@mail.gmail.com> <479F4C3C.5070801@tomjudge.com>

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Hi Tom ! Thanks for your help!

I had to step back the chance an put the "old" gateway back, the
performance was unacceptable  :-(

Looking closer I see that still have the problem using the old gateway
too, in a small scale because I only use vlan to external links.

This old gateway is running 6.2-STABLE and have 4 network interfaces:
fxp0, fxp1, sk0 and sk1.

fxp0, sk0 and sk1 are no parent of any vlans, are connected to
internal networks and work without problems, follow the ifconfig
ouput:

fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=8<VLAN_MTU>
        inet 10.11.0.1 netmask 0xffff0000 broadcast 10.11.255.255
        ether 00:02:a5:41:c6:b2
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
sk0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=b<RXCSUM,TXCSUM,VLAN_MTU>
        inet 10.2.0.36 netmask 0xffff0000 broadcast 10.2.255.255
        ether 00:0a:5e:5c:9e:2e
        media: Ethernet autoselect (1000baseTX <full-duplex,flag0,flag1>)
        status: active
sk1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=b<RXCSUM,TXCSUM,VLAN_MTU>
        inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
        ether 00:0a:5e:5c:27:ef
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active

fxp1 is parent of 7 vlan interfaces: vlan16, vlan20, vlan200, vlan201,
vlan202 and vlan205 that connect my internal network to some external
links, follow the ifconfig output:

vlan16: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 10.16.0.1 netmask 0xffffff00 broadcast 10.16.0.255
        ether 00:0c:f1:ac:91:09
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
        vlan: 16 parent interface: fxp1
vlan20: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 10.20.0.1 netmask 0xffffff00 broadcast 10.20.0.255
        ether 00:0c:f1:ac:91:09
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
        vlan: 20 parent interface: fxp1
vlan200: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 10.200.0.1 netmask 0xfffffffc broadcast 10.200.0.3
        ether 00:0c:f1:ac:91:09
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
        vlan: 200 parent interface: fxp1
vlan201: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 10.200.0.5 netmask 0xfffffffc broadcast 10.200.0.7
        ether 00:0c:f1:ac:91:09
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
        vlan: 201 parent interface: fxp1
vlan202: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 10.200.0.9 netmask 0xfffffffc broadcast 10.200.0.11
        ether 00:0c:f1:ac:91:09
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
        vlan: 202 parent interface: fxp1
vlan204: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 10.0.0.85 netmask 0xfffffffc broadcast 10.0.0.87
        ether 00:0c:f1:ac:91:09
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
        vlan: 204 parent interface: fxp1
vlan205: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        inet 10.0.0.9 netmask 0xfffffffc broadcast 10.0.0.11
        ether 00:0c:f1:ac:91:09
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active

Like seen before netstat -niW show output errors in vlan interfaces

# netstat -niW
Name      Mtu Network       Address              Ipkts Ierrs    Opkts
Oerrs  Coll
fxp0     1500 <Link#1>      00:02:a5:41:c6:b2 80737726     0 93763586
   0     0
fxp0     1500 10.11/16      10.11.0.1            39361     -   781153
   -     -
sk0      1500 <Link#2>      00:0a:5e:5c:9e:2e 95954343     3 85444921
   0     0
sk0      1500 10.2/16       10.2.0.36          1504482     -  2626656
   -     -
sk1      1500 <Link#3>      00:0a:5e:5c:27:ef  7852065     0  5623251
   0     0
sk1      1500 192.168.0     192.168.0.1          22824     -    16590
   -     -
fxp1     1500 <Link#4>      00:0c:f1:ac:91:09  9790593     0  9423268
   1     0
lo0     16384 <Link#5>                            2519     0     2519
   0     0
lo0     16384 127           127.0.0.1          1592519     -     2519
   -     -
vlan2*   1500 <Link#6>      00:00:00:00:00:00        0     0        0
   0     0
vlan11*  1500 <Link#7>      00:00:00:00:00:00        0     0        0
   0     0
vlan16   1500 <Link#8>      00:0c:f1:ac:91:09     1369     0        1
   0     0
vlan16   1500 10.16/24      10.16.0.1                0     -        0
   -     -
vlan20   1500 <Link#9>      00:0c:f1:ac:91:09        0     0        1
   0     0
vlan20   1500 10.20/24      10.20.0.1                0     -        0
   -     -
vlan200  1500 <Link#10>     00:0c:f1:ac:91:09     1373     0        1
   0     0
vlan200  1500 10.200/30     10.200.0.1               0     -        0
   -     -
vlan201  1500 <Link#11>     00:0c:f1:ac:91:09    53524     0    52234
  63     0
vlan201  1500 10.200.0.4/30 10.200.0.5               0     -        0
   -     -
vlan202  1500 <Link#12>     00:0c:f1:ac:91:09     5907     0     4421
   4     0
vlan202  1500 10.200.0.8/30 10.200.0.9               0     -        0
   -     -
vlan203  1500 <Link#13>     00:00:00:00:00:00        0     0        0
   0     0
vlan204  1500 <Link#14>     00:0c:f1:ac:91:09     1459     0        1
   0     0
vlan204  1500 10.0.0.84/30  10.0.0.85                0     -        0
   -     -
vlan205  1500 <Link#15>     00:0c:f1:ac:91:09  9728659     0  9373148
87025     0
vlan205  1500 10.0.0.8/30   10.0.0.9           2453956     -  2417754
   -     -
tun0     1450 <Link#16>                              0     0        0
   0     0
tun0     1450 10            10.169.1.2               0     -        0
   -     -

(the vlan205 is the most used and the output error is increasing...)

Trying to ping with no fragmentation flag a packet bigger than 1472
bytes  throught vlan205 give me the message "Message too long"

# ping -D -s 1472 10.0.0.10
PING 10.0.0.10 (10.0.0.10): 1472 data bytes
1480 bytes from 10.0.0.10: icmp_seq=0 ttl=255 time=5.199 ms
1480 bytes from 10.0.0.10: icmp_seq=1 ttl=255 time=4.905 ms
1480 bytes from 10.0.0.10: icmp_seq=2 ttl=255 time=5.036 ms
^C
--- 10.0.0.10 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 4.905/5.047/5.199/0.120 ms
# ping -D -s 1473 10.0.0.10
PING 10.0.0.10 (10.0.0.10): 1473 data bytes
ping: sendto: Message too long
ping: sendto: Message too long
ping: sendto: Message too long
^C
--- 10.0.0.10 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss

Let me know if you need more information.

 Regards,

Alexandre



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