Building network automation solutions

9 module online course

Start now!

Category: MPLS VPN

Not So Fast Ansible, Cisco IOS Can’t Keep Up…

Remember how earlier releases of Nexus-OS started dropping configuration commands if you were typing them too quickly (and how it was declared a feature ;)?

Mark Fergusson had a similar experience on Cisco IOS. All he wanted to do was to use Ansible to configure a VRF, an interface in the VRF, and OSPF routing process on Cisco CSR 1000v running software release 15.5(3).

Here’s what he was trying to deploy. Looks like a configuration straight out of an MPLS book, right?

read more see 6 comments

EVPN Is More than VPLS on Steroids

Tiziano Tofoni wrote a lengthy comment on my EVPN in small data center fabrics blog post continuing the excellent discussion we started over a beer last October. Today I’ll address the first part:

I think that EVPN is an excellent standard for those who love Layer 2 (L2) services, we may say that it is an evolution of the implementation of the VPLS service, which addresses some limits in the original standard (RFCs 4761 and 4762).

I might be missing something, but in my opinion there’s no similarity between EVPN and VPLS (apart from the fact that they’re trying to solve the same problem).

read more see 1 comments

Automation Win: MPLS/VPN Service Deployment

I always encourage the students attending the Building Network Automation Solutions online course to create solutions for problems they’re facing in their networks instead of wasting time with vanilla hands-on assignments.

Francois Herbet took the advice literally and decided to create a solution that would configure PE-routers and create full-blown device configurations for CE-routers.

read more see 3 comments

Generating OSPF, BGP and MPLS/VPN Configurations from Network Data Model

Over a month ago I decided to create a lab network to figure out how to solve an interesting Inter-AS MPLS/VPN routing challenge. Instead of configuring half a dozen routers I decided to develop a fully-automated deployment because it will make my life easier.

I finally got to a point where OSPF, LDP, BGP (IPv4 and VPNv4) and MPLS/VPN configurations are created, deployed and verified automatically.

read more see 6 comments

Could You Replace MPLS/VPN with IPSec-over-Internet?

Someone recently sent me this scenario:

Our CIO has recently told us that he wants to get rid of MPLS because it is too costly and is leaning towards big Internet lines running IPSEC VPNs to connect the whole of Africa.

He was obviously shopping around for free advice (my friend Jeremy Stretch posted his answers to exactly the same set of questions not so long ago); here are the responses I wrote to his questions:

read more see 5 comments
Sidebar