Underlay

In this episode of the Network Collective Community Roundtable, Tom Hollingsworth and Nick Buraglio join us again to expound on the topic of privacy in networking.

 

We would like to thank Core BTS for sponsoring this episode of Network Collective. Core BTS focuses on partnering with your company to deliver technical solutions that enhance and drive your business. If you’re looking for a partner to help your technology teams take the next step, you can reach out to Core BTS by emailing them here.

 

We also would also like to thank Cumulus Networks for sponsoring this episode of Network Collective. Cumulus is bringing S.O.U.L. back to the network. Simple. Open. Untethered. Linux. For more information about how you can bring S.O.U.L. to your network, head on over to https://cumulusnetworks.com/networkcollectivehassoul. There you can find out how Cumulus Networks can help you build a datacenter as efficient and as flexible as the worlds largest data centers and try Cumulus technology absolutely free.

 

Nick Buraglio Guest

In this Network Collective Short Take, Russ White examines why our industry continually introduces complexity even though most engineers recognize that simpler solutions are usually more robust and maintainable.

 

Russ White

The post Short Take – Complexity Sells appeared first on Network Collective.

In this Network Collective Short Take, Russ White examines why our industry continually introduces complexity even though most engineers recognize that simpler solutions are usually more robust and maintainable.

 

In this episode of the History of Networking, we are joined by Christian O’Flaherty of the Internet Society to discuss the growth of the Internet in Latin America, including the unique role internet exchanges have played in the region, and the resulting connectivity patterns.

 

Outro Music:

Danger Storm Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 3.0 License

http://creativecommons.or

In this episode of the History of Networking, we are joined by Christian O’Flaherty of the Internet Society to discuss the growth of the Internet in Latin America, including the unique role internet exchanges have played in the region, and the resulting connectivity patterns.

 

Christian O'Flaherty Guest Donald Sharp Host Russ White Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post History Of Networking – Christian O’Flaherty – The Latin American Internet appeared first on Network Collective.

At Interop ITX 2018, Network Collective sat down with a few of our favorite speakers from the Network Transformation Summit to chat about the topics they were presenting on. From the emergence and importance of disaggregations and whitebox switching (Peyton Maynard-Koran), multi-gig connectivity for getting more out of your cabling investments (Peter Jones), to business driven design (Denise Donohue), this episode has a little bit of everything.

The book referenced later in the episode is titled “Accelerate: Building and Scaling High Performing Technology Organizations” and can be found on Amazon here: https://www.amazon.com/Accelerate-Building-Performing-Technology-Organizations/dp/B07BMBYHXL

Outro Music:

Danger Storm Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 3.0 License

http://creativecommons.org/licenses/by/3.0/

At Interop ITX 2018, Network Collective sat down with a few of our favorite speakers from the Network Transformation Summit to chat about the topics they were presenting on. From the emergence and importance of disaggregations and whitebox switching (Peyton Maynard-Koran), multi-gig connectivity for getting more out of your cabling investments (Peter Jones), to business driven design (Denise Donohue), this episode has a little bit of ever

In today’s Network Collective Short Take, Russ White discusses his take on the intersection of culture and technology.

 

Russ White

The post Short Take – Culture and Technology appeared first on Network Collective.

In today’s Network Collective Short Take, Russ White discusses his take on the intersection of culture and technology.

 

In a continuation of our MPLS deep-dive series, Nick Russo, Russ White, Jordan Martin, and Eyvonne Sharp return to discuss some of the operational considerations when using MPLS VPNs.

 

We would like to thank Core BTS for sponsoring this episode of Network Collective. Core BTS focuses on partnering with your company to deliver technical solutions that enhance and drive your business. If you’re looking for a partner to help your technology teams take the next step, you can reach out to Core BTS by emailing them here.

 

We also would also like to thank Cumulus Networks for sponsoring this episode of Network Collective. Cumulus is bringing S.O.U.L. back to the network. Simple. Open. Untethered. Linux. For more information about how you can bring S.O.U.L. to your network, head on over to https://cumulusnetworks.com/networkcollectivehassoul. There you can find out how Cumulus Networks can help you build a datacenter as efficient and as flexible as the worlds largest data centers and try Cumulus technology absolutely free.

 

Show Notes:

When enterprise use the term “MPLS”, SP provided VPNS is often what they mean

Generally means a private WAN service, L2 or L3VPN

Quick packet walk (L3VPN only)

CE sends IP packet to ingress PE

Ingress PE performs lookup in FIB

Ingress PE pushes labels in the order in which route recursion occurs

Ingress PE sends to core

Core routers lookup in LFIB for label swaps

Egress PE receives from core

Assuming PHP, egress PE consults LFIB

Action is to remove all labels and send to CE

Overlapping routes in L3VPNs using RD. Makes routes unique, and can be used to engineer HA at the edge (unique RD == copies of same route)

Suppose there are 2 egress PEs which learn the same route. It would be good if the ingress PE could learn the route from both ASBRs. If RRs are in use, this might be harder since RRs hide topology. Unique RD means the RRs will keep routes separate, and advertise both to ingress PE

Enable BGP prefix independent convergence (PIC) edge to install both routes, one as primary, one as repair

L3VPN advantages

Massively scalable L3VPNs, easy extranet/central services support

Trivial to add new sites to existing VPNs, or make changes

Media independent

L2VPN advantages

No routing exchange with customer

Easier for customer to change things (non-IP, IPv6, multicast, etc)

Other handy uses

Internet VPN: for ISPs, there are obvious security advantages to putting the internet in a VPN. It’s easy to import to customers, and ensures the internet can never attack the core. Tradeoff is more state (memory consumed) due to RD and if multiple VRFs on a PE need internet, lots of route duplication. Compare this to route leaking from global table, which is more efficiently, but complex and less secure.

Scrubbing center: A central site where all traffic must traverse can be engineered by making a CE a transit site. Work the RTs appropriately.

Half-duplex VRF: Similar to example above, two access sites need to route via a central site to talk laterally (upstream and downstream VRF defined). Somewhat analogous to private VLANs.