Service Providers behaviour for dual homed enterprises

Thu Sep 24 07:16:59 UTC 2015

Many transit providers support BGP communities to modify how your
announced routes are treated within their network. A quick search shows
that AT&T supports BGP community 7018:70 to lower the default local-pref
100 down to 70 (below peer routes).  If you tag your AT&T announced
routes with BGP community 7018:70, then even AT&T customers should
prefer to enter via Verizon.  

Clinton. 

On Wed, Sep 23, 2015, at 03:38 PM, Jason Bullen wrote:

> So if my research is correct, the internet prefers Verizon UNLESS they
> are
> a direct AT&T customer then they would use the AT&T circuit.
> Is this a standard practice that I should assume to encounter?
> 
> Thanks in advance