4 Apr
                
                    2013
                
            
            
                4 Apr
                
                '13
                
            
            
            
        
    
                8:10 p.m.
            
        On 2013-04-04, at 15:53, Brian Dickson <brian.peter.dickson@gmail.com> wrote:
Leo Bicknell wrote:
Even if the exchange does not advertise the exchange LAN, it's probably the case that it is in the IGP (or at least IBGP) of everyone connected to it,
I have experience of several networks where that is not the case. IGP carries routes for loopback and internal-facing interfaces; external-facing interface routes are only known to the local router; pervasive next-hop-self for IBGP. So, no great survey, but don't assume that everybody does things the same way. Joe