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Posted by Merv on August 13, 2008, 10:06 am
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> In the message
> wrote:
>
> | > | Any particular reason the provider is not providing you with a dynamic
> | > | routing protocol so that you can address subnets at any of your sites
> | > | the way you want without having to use kludges like proxy-ARP?
> | > | What is the backbone transport technology used by your provider ?
> |
> |
> | > It's MPLS.
> |
> |
> | And you have PE-CE routing protocol of static due to - cost or some
> | other factor ?
>
> I don't know the reason. It was allready set up and I'm just trying to
> implement the VLAN's without too much change.
> I configured the switches and everything seems to be working fine (with
> proxy arp).
> What are the drawbacks of this configuration? Will this be too much
> processor load for the 3560 (because od proxy arp) or something else?
As an interim measure what you have done is fine.
I would encourage you to speak to your provider to see why you have
static PE-CE routing and if dynamic routing is avialbel ( at what
cost) , etc, etc. At a minimum you will learn more about what is
available.
The advance of dynamic PE_CE is that you will be able to restructure
your LAN sub-netting at each site without having to use proxy-ARP.
In general, the use of proxy ARP is not encouraged.
see
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080094adb.shtml#disadvantages
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