Policy-based Tunnel Selection (PBTS) on Cisco IOS-XR

pbts

Recently, I had to look after PBTS on Cisco ASR9K platform and faced some issues, here are some results about my tests. PBTS … [Read more...]

HTIRW: Standards Bodies

(yes, I know, it's been a while... But it's time to get back to this series) Up to this point in this series, we've been … [Read more...]

NG mVPN-Control Plane Overview

mVPNFig.1

In this post we will be exploring the shortcomings of MVPN (Draft Rosen/RFC 6037), with a focus on how NG-MVPN technologies … [Read more...]

Network Design Concepts Part-3

In the first article of the series, reliability and resiliency are covered. We should know that whatever device, link type or … [Read more...]

HTIRW: Provider Peering and Revenue Streams (Part 2)

This is a continuation from last week's post on provider peering streams. Second Example: Customer to Noncustomer Assume … [Read more...]

HTIRW: Provider Peering and Revenue Streams (Part 1)

htirw-fig-02

In the last post in this series, I described several types of providers -- and even how those descriptions are no longer … [Read more...]

Thinking Through Title II Regulation

Over at CircleID, Geoff Huston has a long'ish article on Title II regulation of the Internet, and the ideals of "net … [Read more...]

EVPN: Intro to next gen L2VPN

Fig 1

Introduction: With the ascent of DCI, a new set of requirements emerged which are not fully addressed by current L2VPN … [Read more...]

Video over Internet

Video_Drop

Couple days ago I made an interesting talk about Video Traffic over Internet. Sales engineer goes to company and he claims … [Read more...]

HTIRW: The Business Side of DNS (2)

</a>continued from part 1 The top level server is either paid for by the domain owner (if they are managing the TLD … [Read more...]

HTIRW: The Business Side of DNS (1)

dns-02

So your host queries a DNS server to map the name to a location (an IP address), which sets off a chain of queries across a … [Read more...]

Secret CEF Attributes Part 6, The BGP Connection

In the first five parts of this series we covered all the steps necessary to distribute QoS and monitoring to a large … [Read more...]

Using Next Generation MVPN to optimize your MPLS core – Part 1

Intra-AS

Like many network engineers I have had difficulties with multicast, the logic is all messed up right!? The only … [Read more...]

Secret CEF Attributes, Part 5

So far we've explored some very cool features of CEF and the attributes we can push into the FIB to identify certain kinds of … [Read more...]

Secret CEF Attributes, Part 4

In Parts 1, Part 2 and Part 3 we saw we can use the CEF table to express all sorts of different QoS policies. In Part 4 we … [Read more...]