Re: A PC with two NIC routing problem

I guest there might be reverse path filtering applied on linux
machine. Some linux distributions have it enabled by default.

Can you show output of command "cat
/proc/sys/net/ipv4/conf/all/rp_filter" and "cat
/proc/sys/net/ipv4/conf/<INTERFACE_HERE>/rp_filter" from you linux
box?

On Fri, Oct 1, 2010 at 8:55 PM, Jack <ccie.unnumbered_at_gmail.com> wrote:
> Yes, 10.10.10.1 and 11.11.11.1 respectively.
>
> On 10/01/2010 01:41 PM, Sergey Matashuk wrote:
>>
>> do host10 and host11 have defult gateway configured?
>>
>> On Fri, Oct 1, 2010 at 8:32 PM, Jack<ccie.unnumbered_at_gmail.com> wrote:
>>
>>>
>>> A linux PC has two NIC cards:
>>> eth0=10.10.10.100/24 belongs to VLAN 10
>>> eth1=11.11.11.100/24 belongs to VLAN 11
>>> the default gateway is 10.10.10.1
>>>
>>> A layer 3 switch has the following configuration:
>>> int vlan 10
>>> ip addr 10.10.10.1 255.255.255.0
>>> int vlan 11
>>> ip addr 11.11.11.1 255.255.255.0
>>>
>>>
>>> Host10 on vlan 10 with ip address 10.10.10.10/24 can ping 10.10.10.100,
>>> but
>>> cannot ping 11.11.11.100
>>>
>>> Host11 on vlan 11 with ip address 11.11.11.11/24 can ping 11.11.11.100,
>>> but
>>> cannot ping 10.10.10.100
>>>
>>>
>>> How to make the linux PC respond to all pings from both hosts?
>>>
>>>
>>> Thanks,
>>> Jack
>>>
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
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>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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Received on Sat Oct 02 2010 - 00:22:23 ART