BGP network commands for private ip addresses

[Steve Coady]

Hello

When/why would an RFC1918 subnet be advertised via BGP network command?

[Jon Marshall]

Steve

Usually with an MPLS setup where the company uses private addressing which the vast majority of them do.

Jon

[Steve Coady]

John

Thank you for the response.

The service from the MPLS provider for any specific company would then be a private network?

When/why would an external subnet be advertised via BGP network command?

What scenario would there be to advertise both external and RFC1918 subnets via BGP?

[Jon Marshall · Accepted solution]

Steve

The MPLS service is considered a private network to all intents and purposes ie. each customer's traffic is kept separate from every other customer's.

Usually that it is. Obviously things like extranets allow multiple customers to communicate with each other if that is what they want.

If you mean public IPs when you say external subnet that would typically be used by a company where they have multiple peerings to an ISP or multiple ISPs for internet access and they have their own set of public IPs they are responsible for.

These are just general answers though.

Is there anything specific you had in mind ?

Jon

[Steve Coady]

John

Thanks again for the response. Nothing to specific.