Re: [RRG] LISP question

[Tony Li <tli@cisco.com>]

On Dec 6, 2007, at 3:22 PM, Robert Raszuk wrote:

> In the interest of saving time tomorrow I would like to ask for  
> some clarification reg how large corporate enterprise sites (those  
> who run full table of BGP today) would auto discover ITRs ?
> Their network maybe multi-as as well as multi-area. The answer from  
> the audience of LISP tutorial was that EIDs-subnets would be  
> carried in those networks in BGP to attract traffic to ITRs. But on  
> the other hand we know that there can be much more EID subnets (I  
> think I heard 3 fold estimate) then there is today IP prefixes in  
> full BGP table ... not too mention 10^10 long term number.

Most likely, the ITRs would be co-located with the exact same routers  
that originated default into the IGP.

> What would be the benefit and driver for such large corporate sites  
> to install ITRs ?

Ability to advertise locators on a per-host basis and perform inbound  
TE.  Ability to effectively get current PI capabilities without  
actually justifying a PI prefix.
Tony

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