echo "1" > /proc/sys/net/ipv4/ip_forward

suomi

On 2011-05-31 09:34, Dan Track wrote:
> Hi,
>
> I've got a server where I've got two interfaces (vlan 200 and vlan
> 300). If I get traffic coming into vlan 200 but sourced from a network
> that vlan 200 subnet doesn't know about, the server should send the
> traffic out of it's default gateway i.e. vlan 300, but this isn't
> happening. If I do a tcpdump on both interfaces I can see traffic
> coming in on vlan 200 but failing to even be present on the return in
> vlan 300 (not even present on vlan 200 - did it for sanity sake).
> However, if I put in an explicit route in stating that this unknown
> network exists out of vlan 200 then everything works fine.
>
> My routing table is like this:
>
> ip route
> 166.14.134.144/28 dev vlan200  proto kernel  scope link  src 166.14.134.154
> 159.156.137.32/28 dev vlan300  proto kernel  scope link  src 159.156.137.42
> 127.0.0.0/8 dev lo  scope link
> default via 159.156.137.33 dev vlan300
>
> vlan 200 and vlan 300 sit on the same bonded interface. Trunking is
> set on the switch.
>
> It's almost as though the OS (kernel) is saying that you can't take
> input from one int and then send it out another int. Are there some
> parameters I need to change?
>
> Thanks for any help.
>
> Dan
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