BGP Border Designs

[Stewart Beam]

A quick question about BGP on the enterprise edge with the internet.

Most designs I see use a model where two border routers each have 1 connection to only 1 service provider.  Is there a reason for this as opposed to peering with both ISPs on both border routers? 

Any information about why one design would be used, or why peering with both ISPs on both routers should not be used would be appriciated.

[FullTimeWebHosting]

In the book of Sam halabbi of Internet Routing Protocols and the book of BGP Design Solution Guide you could find all designs and why is better a dual peer to both ISP if you want to archive 99.9999% availability + got more bandwidth on your WAN network

Sent from Cisco Technical Support iPhone App

[Stewart Beam]

Thanks Edgar,  I know Halabbi's book, but have been putting off really getting involved with it and more advanced BGP implementations until I started studying for my CCIE.  I guess I will have to take a look at both books now instead of waiting.

[FullTimeWebHosting]

When i get back to office I'll sent you some pics of what is on the BGP books I'll told you before

Sent from Cisco Technical Support iPhone App