From: Raheel Itrat (syedraheel@gmail.com)
Date: Mon Oct 20 2008 - 17:26:12 ARST
Michael
There are 3 devices in total two routers connected to the same switch.( I
mistakenly wrote BB1...there is no BB1). I have tried enabling local proxy
arp as well....but still getting the encaps failed message... Below is the
config
R1:
int e0
ip local-proxy-arp
ip address 101.1.1.1 255.255.255.0
ip route 102.1.1.1 255.255.255.255 e0
R2:
int e0
ip local-proxy-arp
ip address 102.1.1.1 255.255.255.0
ip route 101.1.1.1 255.255.255.255 e0
SW1:
int e1/1
switch mode acc
switch acc vlan 10
int e1/2
switch mode acc
switch acc vlan 10
On Tue, Oct 21, 2008 at 12:30 AM, Michael Dorion <dorionm@gmail.com> wrote:
> The example is a little confusing without configs. Looks like you listed 4
> device but only 2 IPs and no masks. But to do proxy-arp on the same
> interface, the router needs to have local proxy arp enable. This is not
> enabled by default, and you can verify with the "sho ip interface
> <interface>" command. You should see proxy arp enabled but not local proxy
> arp. The router would also need a route to the destination, or a wider mask.
>
>
> On Mon, Oct 20, 2008 at 2:05 PM, <syedraheel@gmail.com> wrote:
>
>> Hi!
>> While doing some labing I came accross an interesting scenario,,,,
>>
>> R1 and BB1 are connected to the same switch SW1 in same vlan 10. But the
>> IPs of
>> their interfaces which connect to the switch are of different subnets like
>> 101.1.1.1 and 102.1.1.1
>>
>> its like R1(e0)-----(e1/1)SW1(e1/2)-----(e0)R2 , where e1/1 and e1/2 are
>> configured in the same access vlan10
>>
>> Now, I cant ping between the two router interfaces, I set a static route
>> 102.1.1.1 255.255.255.255 e0 on R1 and similarly a route back on
>> R2.......I
>> still see encapsulation failed on the debug.
>>
>> So whats happening is that when its arping for the destination address its
>> not
>> getting a reply back with a mac-address rite?...
>>
>> Can anyone explain this behaviour? How can I enable communication between
>> the
>> two routers?
>>
>> May be its too simple for a ccie forum ....but still we tend to forget the
>> basics while studying for advance topics sometimes
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
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