No, x.y.z.a and p.q.r.s do not belong to the same IP network. They are
different. You've answered some part of my question because I traced the
packets. I'm not familiar with the vlan Linux code.
I have a couple of questions though.
If a packet comes in with a vlan id that corresponds to a vlan interface
that has been configured on a physical interface but with an IP address
that is different from the vlan interface will the packet be dropped?
e.g. If a vlan interface say eth1.3 has been configured with an IP address
of 10.1.1.1 and a packet with a vlan id of 3 comes in with an IP address
192.168.1.1 I presume the packet will be dropped even if
there is another vlan interface configured with the address 192.168.1.1 on
the same machine.?
Secondly if an interface is configured for vlan tagging and a packet
without a tag comes in, will it be dropped?
I have a hub chip here that can add a default vlan id as it egresses out
of an interface but it puts the same id on all the packets irrespective of
which port it came into the chip on.
Thanks
S
JOJAN <JOJAN@xxxxxxxxxx>
Sent by: vlan-bounces@xxxxxxxxxxxxxxx
02/01/2005 06:40 AM
Please respond to "Linux 802.1Q VLAN"
To: "'Linux 802.1Q VLAN'" <vlan@xxxxxxxxxxxxxxx>
cc:
Subject: RE: [VLAN] Vlan issues
Hi
Please tell me, if x.y.z.a and p.q.r.s belong to same IP network? If so,
this can happen.
thanks
jojan
-----Original Message-----
From: warrier@xxxxxxxxxxx [mailto:warrier@xxxxxxxxxxx]
Sent: Tuesday, February 01, 2005 1:55 AM
To: vlan@xxxxxxxxxxxx
Subject: [VLAN] Vlan issues
Hello
I'm working on the Linux kernel 2.4.25. I've not added any vlan
patches, all I have is the vlan code that came with the kernel. I'm
working on a PowerPC 8270 using one of the FCC's as an ethernet
controller.
This FCC is connected via MII to an vlan chipset that is capable of
supporting 10 ports.
I have two seperate networks connected to two of the ports. All traffic
from these ports are sent to the FCC of the 8270 using internal chip
configurations. The 8270 just accepts them as traffic coming from one
connection.
I have configured two VLAN interfaces on the 8270 to deal with network
traffic coming from both the networks.
Let us say the two network addresses are x.y.z.a and the other one is
p.q.r.s .
I have noticed that when I bring both of these vlan interfaces up the one
the comes up first works. The second one does not. Using ethereal and arp
I have managed to see that both the networks can send and receive arps but
when I dump the arp addresses on the 8270 board the arp addresses seem to
be always tied to the interface that was enabled first.
Has anybody seen such a problem? Is there a solution to this. Is this a
vlan issue?
S
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