Internet Edge Router replacement - IPv6 route tablesizeconsiderations

Richard A Steenbergen ras at
Fri Mar 11 14:27:32 CST 2011

On Fri, Mar 11, 2011 at 12:55:33PM -0600, James Stahr wrote:
> link-local address.  Then I realized, why even assign a global in the 
> first place?  Traceroutes replies end up using the loopback. BGP will 
> use loopbacks.  So is there any obvious harm in this approach that I'm 
> missing?

Traceroute replies most assuredly do NOT use loopbacks on most networks, 
and it would make troubleshooting massively more difficult if this was 
the only option. Imagine any kind of complex network where there is more 
than one link between a pair of routers (and don't just picture your own 
internal network, but imagine customers connecting to their ISPs as 
well) , and now tell me how you plan on identifying a particular link 
with a traceroute. The two words that best sum this up would be "epic 

Richard A Steenbergen <ras at>
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)

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