Home Tags Posts tagged with "BGP"

BGP

BGP – the protocol that runs the Internet

BGP Peer Groups

BGP peer groups, dynamic update peer groups and BGP templates

As a router gains more and more BGP neighbors, two issues arise. The first one is that with many neighbors, whenever the router needs to...

BGP errors

BGP errors, BGP error codes, and BGP error handling.

In this blog post we’ll be looking at BGP errors. For that, our first question should be: is there an error, or is everything...

BGP EVPN

BGP – the right tool for so many jobs

Like other very successful protocols such as HTTP and DNS, over the years BGP has been given more and more additional jobs to do....

BGP security: an overview of the RPKI framework

The Resource Public Key Infrastructure (RPKI) system is a way to couple an IP address range to an autonomous system number through cryptographic signatures,...

768K Blog

The 768k or Another Internet Doomsday? Here’s how to deal with the TCAM overflow at the 768k boundary.

On August 8th, 2014 some ISPs experienced a phenomenon called the “512k Day”. The global BGP routing table, which consists of the global Internet...

BGP LU

BGP Labeled Unicast (BGP-LU)

This blog post discusses BGP Labeled Unicast (BGP-LU) which is used in multi-regional networks to carry the label information. While the RFC3107 “Carrying Label...

Recursive Lookup in BGP

The aim of this article is to discuss the importance of Recursive Lookup in BGP. First of all we need to understand the purpose...

IGP Interior Gateway Protocol and BGP Border Gateway Protocol

Accumulated IGP and BGP

RFC 7311 defines an optional non-transitive BGP attribute called the Accumulated IGP Metric Attribute (AIGP). As we know, IGP stands for Interior Gateway Protocol...

QoS

QoS Policy and its propagation via BGP (QPPB)

Quality of Service (QoS) refers to a collection of technologies that networking devices use to apply different treatment to packets as they pass through...

BGP Conditional Route Injection

BGP Conditional Route Injection

We have recently posted the BGP Route Aggregation eBook that discusses the benefits of route aggregation and explains the various optional parameters associated with...

BGP route dampening

BGP Route Dampening: obsolete or still used in the industry?

The unstable route whose availability alters repeatedly is called a flap. When flaps occur, fexcessive number of BGP UPDATE messages are sent to BGP...

BGP attribute filter

BGP Attribute Filtering and Error Handling

The BGP Attribute Filter feature enables BGP speakers to take a certain action based on the presence of a specified path attribute inside the...

BGP Optimal Route Reflection

BGP Optimal Route Reflection as an alternative to BGP Add Path

Full iBGP Mesh and Route Reflection To avoid loops in a Full iBGP Mesh, BGP routers are only allowed to learn prefixes over iBGP from...

BGP and NAT

Network Address Translation (NAT) and BGP Explained

Network Address Translation (NAT) was originally described in RFC 1631. Although initially presented as a short term solution for preventing the IPv4 addresses depletion,...

Advertising Multiple Paths in BGP (BGP-Addpath)

The BGP advertisement of a prefix with new attributes replaces the previous announcement of that prefix. This behavior is known as an Implicit Withdraw,...

WISP

BGP and Traffic Engineering Mechanisms for WISPs

In this blog post, we will take a look at Kevin Myers's presentation where he discusses deployment of  both OSPF and BGP routing protocols...

Bit Indexed Explicit Replication BIER

Bit Indexed Explicit Replication and the BGP Extensions for BIER

In this article we’ll take a look at the architecture for multicast forwarding called the Bit Indexed Explicit Replication or simply BIER. However, we’ll...

BGP/MPLS Layer 3 VPNs Practical Configuration

In our previous blog article we’ve discussed the benefits and the fundamental principles of BGP/MPLS L3 VPNs. We have covered the definition of the...

BGP VPN

BGP / MPLS Layer 3 VPNs

What is VPN? Virtual Private Networks (VPN) are designed to provide users with the private networks capabilities over a shared infrastructure. They connect remote sites...

IoT BGP

Internet of Things and BGP

The Internet of Things (IoT) attracts huge public attention nowadays. It is a network of interconnected physical devices (things) which sense and interact with...

BGP and cryptocurrencies

BGP and Cryptocurrencies

What is Cryptocurrency? Cryptocurrency is a digital asset that works as a medium of exchange. It uses cryptography to secure transactions and to control the...

BGP in Large-Scale Data Centers

BGP in Large-Scale Data Centers

Large-scale data centers (DCs) connect hundreds of thousands or even more servers, having millions of users. Generally, every DC runs two kinds of applications....

BGP Looking Glass Servers

What BGP Looking Glass servers are and how network administrators use them.

Whether you are an experienced network administrator or you have just started to learn Border Gateway Protocol (BGP), Looking Glass (LG) is definitely a...

bgp flowspec

Noction bets on BGP FlowSpec

While networks are agnostic to the content of the serviced packets, end users have a very good understanding of what traffic they have and...

bgp and asymetric routing

BGP and asymmetric routing

What is Asymmetric Routing? Asymmetric routing is the situation where packets from A to B follow a different path than packets from B to A....

Migrating to BGP

Migrating to BGP

Here on the Noction blog we've covered many aspects of using BGP to connect your network to the internet. However, often implementing BGP isn't...

BGP and parallel links

BGP and equal-cost multipath (ECMP)

One given in the network world is that bandwidth will increase. So that Gigabit Ethernet link that provided bandwidth to spare a year ago...

bgp attributes

Lesser-known BGP path attributes

The past few weeks we've discussed the main BGP path attributes: the next hop, the AS path, the MED. We also covered the community...

game performance

Optimizing network performance for online gaming

In many online games, very good network performance is a prerequisite for satisfactory gameplay. However, there are many kinds of games, and their networking...

BGP security

BGP security: announcing prefixes without authorization

In our last post, we looked at protecting the TCP session that carries BGP information between two routers, mainly against spoofed TCP resets. However,...

MD5 password

BGP Security: the MD5 password and GTSM

Back in the late 1980s and the early 1990s when BGP was developed, security was still an afterthought for protocols used on the internet....

route optimizers

Do route optimizers cause fake routes?

Yesterday, an incident occurred where an Autonomous System (AS) advertised more than 7,000 prefixes that belong to other networks. These are "more specific" prefixes—subsets...

Peering policy

What should your peering policy look like?

As discussed in earlier posts, as networks grow larger it starts making sense to exchange traffic with other networks directly (peering) rather than pay...

IPv4 BGP vs IPv6 BGP

IPv4 BGP vs IPv6 BGP

BGP is older than IPv6. Even BGP-4, the version we still use today, predates IPv6: the first BGP-4 RFC (RFC 1654) was published in...

network downtime

The top 4 causes of network downtime

Business people often believe that in order to have a reliable system, you need reliable components. Using reliable components to build your network certainly...

BGP OSPF

BGP and OSPF. How do they interact.

In some ways, BGP is nice and simple. For instance, there's only one BGP: BGP version 4. Many network professionals have been asking the...

Understanding BGP Communities

After reading the title of this article you may be thinking of small neighborhoods in the world's most-connected cities where BGP-minded people live together,...

Filtering your BGP updates

One thing we all learn quickly after getting started with BGP is that if left to its own devices, the protocol will happily propagate...

Border Gateway Protocol Inforgrafic

Why BGP is not enough?

It’s common knowledge that Border Gateway Protocol has no ability to make performance-based routing decisions and often routes traffic through paths that are congested...

route reflector configuration

Route Reflectors – an alternative to full-mesh iBGP configuration

The typical fully-meshed iBGP configuration of routers can become very difficult to manage in large networks. Because of the increasing numbers of iBGP sessions...

routing anomalies

Routing anomalies – their origins and how do they affect end users

Nowadays, the Internet is made-up of more than 45,000 active Autonomous Systems (ASes), each with a different complexity level and specific configurations. To accomplish...

BGP-based inter-domain traffic engineering

BGP-based inter-domain traffic engineering: important considerations

Inter-domain traffic engineering aims to optimize traffic performance, originating and terminating in different administrative domains. At the moment, Autonomous Systems exchange traffic via exterior...

Deploying BGP for redundant IP connectivity

Deploying BGP for redundant IP connectivity

All organizations that depend on Internet for sales revenue or business continuity require internet redundancy. Downtime lowers productivity, yields losses and painfully affects the...

bgp

Is BGP multi-homing enough for WAN network performance?

BGP multihoming has become as necessary to the networks connected to Internet, as the use of redundant power sources or multiple data centers. No...


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