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New Member

How and why do people use BGP in corporate environment

Hi all

I see most people use IGP's when in a corporate company, however I have seen alot of people using BGP also in corporate environments, this is alongside another IGP such as eigrp or ospf.

Why would people use both BGP and and IGP together?

also if I used BGP on my WAN and OSPF in my core, do people normally redistribute the routes into each other?

and with BGP if I use no synchronization command, can BGP pass the routes over intermidiate hops that dont use BGP or will this not work?

cheers

5 REPLIES
Hall of Fame Super Gold

How and why do people use BGP in corporate environment

One reason is being multihomed to the Internet.

Another is using MPLS.

The the details of configuration vary by the needs.

New Member

How and why do people use BGP in corporate environment

Hi

but would we only need BGP on the router connecting to the internet? would we then normally just redistribute this route into our OSPF domain from BGP, what do most people do ? use a static to the internet routers running BGP then redistribute the static into the OSPF ?

Gold

How and why do people use BGP in corporate environment

In addition to  Paolos remarks, BGP gives you an new set of "knobs & switches " to manipulate the hows and whys of

route advertisements even within the enterprise.

There is a school of thought that suggests using the IGP to build  the infrastructure, then use BGP for policy.

New Member

How and why do people use BGP in corporate environment

can you ellaborate on this a little ?

Gold

How and why do people use BGP in corporate environment

You see some of this in an Sp environment. apps and routes to apps are all advertised via bgp, the IGP just exists to tie the pieces together. In the enterpise world, (its been a couple of years) we would use local preferences for gaining access to enterprise services and internet access.

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