When configuring 2 VLANs to be on the same subnet, only one works.

[Stefan Lambrev]

Greetings,

For me your configuration looks invalid. Try with netmask 255.255.0.0
The question here is why freebsd allow this.

On Jan 13, 2009, at 3:09 PM, Eitan Shefi wrote:

> I'm testing a NIC driver.
> I use 2 directly connected FreeBSD-7.0 hosts.
> When I create 2 VLANs for the same interface (mtnic0), on each host,  
> and
> configure the VLANs on each host to be on the same subnet:
> ping works only to one of the VLANs.
>
> I run:
> On sw259:
> /sbin/ifconfig vlan1 create vlan 1 vlandev mtnic0
> /sbin/ifconfig vlan2 create vlan 2 vlandev mtnic0
> /sbin/ifconfig vlan1 91.154.12.5 netmask 255.0.0.0
> /sbin/ifconfig vlan2 91.155.12.5 netmask 255.0.0.0
>
> On sw260:
> /sbin/ifconfig vlan1 create vlan 1 vlandev mtnic0
> /sbin/ifconfig vlan2 create vlan 2 vlandev mtnic0
> /sbin/ifconfig vlan1 91.154.12.6 netmask 255.0.0.0
> /sbin/ifconfig vlan2 91.155.12.6 netmask 255.0.0.0
>
> Now on sw259 run:
> ping 91.154.12.6 - works.
> ping 91.155.12.6 - does not work.
>
> I saw the same behavior also when running via a different NIC.
>
>
> Is this expected ?
>
>
> Thanks,
> Eitan.
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--
Best Wishes,
Stefan Lambrev
ICQ# 24134177