[VLAN] problem with basic topology

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Hi Andreas,

Is your BOX A eth0 card VLAN aware. If it is unaware it would be dropped by
the card.


Regards
Salil


On 8/23/06, Fernando Rodriguez <frod@xxxxxxxxxxxxx> wrote:
>
> Andreas,
>
> Have you done an ifconfig to see your interfaces listed ??
>
> Maybe you need to add a eth0 with no vlan in order to keep those errors
> from
> showing
>
> It happened to me in a setup after i added an ip whith no vlan it stopped.
>
>
> Fernando Rodriguez
> AITelecom
> -----Mensaje original-----
> De: vlan-bounces@xxxxxxxxxxxxxxx [mailto:vlan-bounces@xxxxxxxxxxxxxxx] En
> nombre de Andreas S?bstad
> Enviado el: Martes, 22 de Agosto de 2006 04:14 p.m.
> Para: vlan@xxxxxxxxxxxxxxx
> Asunto: [VLAN] problem with basic topology
>
> Hi,
> I'm trying to implement the following very basic topology:
>
>
> box A:                        box B:
> _______ eth0           eth0 _______
> |          |_ _ _trunk _ _ _|           |
> |______|                      |_______|
>
> Both ethernetcards are 'PWLA8391GT (intel pro/1000 gt desktop adapter)'.
> The 'e1000' driver is used on both computers.
> The trunk is a crossover-cable connecting the two nics directly.
>
> Box A is runing debian etch(2.6.16-2-amd64-k8-smp)  and has been
> configured
> with the following configuration:
>
> ip link set up dev eth0
> modprobe 8021q
> vconfig set_name_type VLAN_PLUS_VID_NO_PAD
>
> vconfig add eth0 2
> ip addr add dev vlan2 10.10.2.2/24 broadcast 10.10.2.255  ip link set dev
> vlan2 up
>
> vconfig add eth0 3
> ip addr add dev vlan3 10.10.3.2/24 broadcast 10.10.3.255  ip link set dev
> vlan3 up
>
> vconfig add eth0 4
> ip addr add dev vlan4 10.10.4.2/24 broadcast 10.10.4.255  ip link set dev
> vlan4 up
>
> ip route add default via 10.10.2.1
>
> Box B is running debian sarge(2.6.15-1-686) and has been configured with
> the
> following configuration:
>
> ip link set up dev eth0
> modprobe 8021q
> vconfig set_name_type VLAN_PLUS_VID_NO_PAD
>
> vconfig add eth0 2
> ip addr add dev vlan2 10.10.2.1/24 broadcast 10.10.2.255  ip link set dev
> vlan2 up
>
> vconfig add eth0 3
> ip addr add dev vlan3 10.10.3.1/24 broadcast 10.10.3.255  ip link set dev
> vlan3 up
>
> vconfig add eth0 4
> ip addr add dev vlan4 10.10.4.1/24 broadcast 10.10.4.255  ip link set dev
> vlan4 up
>
>
> If I test the nics without  vlan they work perfectly. If I use them with
> the
> above mentioned conf then eth0 on box a won't recive anything while eth0
> on
> box b is able to both transmitt and recive.
>
>
> I did the following test:
>
> on box a:
>
> PING 10.10.2.1 (10.10.2.1) 56(84) bytes of data.
> From 10.10.2.2 icmp_seq=1 Destination Host Unreachable  From 10.10.2.2
> icmp_seq=2 Destination Host Unreachable  From 10.10.2.2 icmp_seq=3
> Destination Host Unreachable
>
> tcpdump: WARNING: eth0: no IPv4 address assigned
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
> 22:47:43.081271 arp who-has 10.10.2.1 tell 10.10.2.2 22:47:44.080780 arp
> who-has 10.10.2.1 tell 10.10.2.2 22:47:46.079810 arp who-has 10.10.2.1tell
> 10.10.2.2
> 22:47:47.079327 arp who-has 10.10.2.1 tell 10.10.2.2
> 22:47:48.078966 arp who-has 10.10.2.1 tell 10.10.2.2
>
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on vlan2, link-type EN10MB (Ethernet), capture size 96 bytes
> 22:48:34.087678 arp who-has 10.10.2.1 tell 10.10.2.2
> 22:48:35.087691 arp who-has 10.10.2.1 tell 10.10.2.2
> 22:48:36.087707 arp who-has 10.10.2.1 tell 10.10.2.2 22:48:38.087740 arp
> who-has 10.10.2.1 tell 10.10.2.2
>
> on box b:
>
> tcpdump: WARNING: eth0: no IPv4 address assigned
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
> 23:50:40.507796 arp reply 10.10.2.1 is-at 00:0e:0c:b3:9f:d6
> 23:50:41.507648 arp reply 10.10.2.1 is-at 00:0e:0c:b3:9f:d6
> 23:50:43.507542 arp reply 10.10.2.1 is-at 00:0e:0c:b3:9f:d6
> 23:50:44.507419 arp reply 10.10.2.1 is-at 00:0e:0c:b3:9f:d6
>
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on vlan2, link-type EN10MB (Ethernet), capture size 96 bytes
> 22:52:11.076059 arp who-has 10.10.2.1 tell 10.10.2.2
> 22:52:12.076072 arp who-has 10.10.2.1 tell 10.10.2.2
> 22:52:14.076104 arp who-has 10.10.2.1 tell 10.10.2.2
>
> If I do a 'cat /proc/net/dev' on box b I can see that data is being
> recived
> and transmitted on eth0 and vlan2 .
> If I do a ' cat /proc/net/dev' on box a I can only see data being
> transmitted on eth0 and eth2. There is no reciveing and no dropping of
> packages on the same interfaces. I have tested with another
> crossover-cable: same result. I have tried also to assign static macaddr
> in
> the arp table on both computers but  eth0  on  box a still wont recive
> anything.
>
>
> Anybody got any ideas on what I am doing wrong?
>
>
>
> Best Regards
>
> Andreas
> _______________________________________________
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> http://www.candelatech.com/mailman/listinfo/vlan
>
>
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>



-- 
Salil Mehta
Software Engineer
Conexant Systems, Inc
+91 981 007 3412
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