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Posted by iwetzel@gmx.net on July 25, 2006, 11:26 am
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Hello again
now a can specify my request a little bit more
I have to enable a proxy arp at the edge router for the hole ip subnet.
afterwards the router should anser each arp request with his own MAC.
Ho i configure this at Alpine/Summit/Cisco/ERX
Best regards
iwetzel@gmx.net wrote:
> Hi
>
> following state. I have a switch with e.g. 48 userports and one uplink
> port. This switch is a carrier grade switch which supports only
> residential mode. Therefore all frames from the user ports are
> forwarded to the uplink if. All frames are inside the same Vlan. at the
>
> uplink port a router is connected.
>
> Now a new requirement was defined which says sometimes for a special
> Vlan a communication between each userport should be possible on
> ethernet base. That means a routing via subnets with a 30 bit subnet
> mask is not allowed.
>
> And now the question. What can be the right configuration option for a
> router /L3 switch (cisco/extreme)to ensure this functionality?
>
> The high level engineers says there is some kind of option at some
> edge router which enables some kind of packet loop. Normaly the
> router/switch only forwards a package to all other ports at the same
> vlan but it is prohibited to froward the frame to the same port.
> This function should be disabled from my point of view.
>
> thanks for your hints tips and hands of brain
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