On 16/Jun/16 21:36, Baldur Norddahl wrote:
Hi
If I need to speak BGP with a customer that only has 1G I will simply make a MPLS L2VPN to one of my edge routers. We use the ZTE 5952E switch with 48x 1G plus 4x 10G for the L2VPN end point. If that is not enough the ZTE 8900 platform will provide a ton of ports that can do MPLS.
The tunnel is automatically redundant and will promote link down events, so there is not really any downside to doing it this way on low bandwidth peers.
Personally (and at work), I stay away from such topologies. Centralizing IP connectivity like this may seem sexy and cheap in the start, but it has serious scaling and operational issues down the line, IMHO. We push IP/MPLS all the way into the Metro-E Access using a team of Cisco ASR920's and ME3600X's. The value of being able to instantiate an IP service or BGP session directly in the Metro-E Access simplifies network operations a great deal for us. Needless to say, not having to deal with eBGP Multi-Hop drama does not hurt. Centralizing is just horrible, but that's just me. The goal is to make all these unreliable boxes work together to offer a reliable service to your customers, so making them too inter-dependent on each other has the potential to that away in the long run. Mark.