NFA version 24.05 has just been released, introducing new features and significant...
Noction Blog
The latest BGP network optimization and IP flow analysis trends.
Diverting DDoS traffic using the FlowSpec redirect-to-IP next-hop capability (configuration example)
Distributed denial-of-service (DDoS) attacks can be a major threat to the availability and security of networks. These...
Diverting DDoS traffic using the FlowSpec redirect via VRF capability. Configuration example.
In the previous article, we described different DDoS attacks and their impact on network infrastructure. We focused on...
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BGP’s hold and keepalive timers, detecting dead neighbors and BFD
When the BGP session between two routers is established, the two routers exchange prefixes and then start sending...
Where do networks interconnect?
As end-users, we expect to connect to an Internet Service Provider which will take our packets and deliver them to all...
Debugging BGP states
Border Gateway Protocol is unique among routing protocols because it requires a number of parameters to be configured...
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 BGP Multi Exit Discriminator (MED) attribute and tie-breaking
When BGP needs to choose which route to reach a certain destination is best, it first looks at the local preference...
Understanding the AS path and AS path prepending
In earlier articles, we discussed the next hop and local preference attributes. Today we'll be looking at the AS_PATH...
What you should know about BGP’s LOCAL_PREF
In the previous blog post, we looked at the BGP NEXT_HOP attribute. Today we'll cover another attribute: the...
A fresh look at BGP’s NEXT_HOP
Once a BGP session is established, routers will exchange two types of messages: KEEPALIVE and UPDATE. Keepalive...
Optimizing network performance for online gaming
In many online games, very good network performance is a prerequisite for satisfactory gameplay. However, there are...
Network latency and its effect on application performance
We've talked about network latency several times in previous blog posts. Today, let's drill a bit deeper on that...
Optimizing network performance for video streaming
Video is an interesting network application. Many users consume hours of video per day, and an hour of HD video is...
Efficient and effective probing of Internet subnetworks
When flying, it's important to choose the right airline. Obviously, a direct connection is usually best, but if a...
Peace of mind during provider maintenance downtime
The network that never needs any maintenance, along with the associated downtime, hasn't been built yet. You can plan...
BGP security: the BGPsec protocol
In our last post, we took a look at RPKI. With RPKI, it's possible to reject prefixes that are originated by the wrong...
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...
BGP Security: the MD5 password and GTSM
[This post launches the “BGP Security Month” on Noction blog, which will continue with other 3 posts to come till the...
Do route optimizers cause fake routes?
Yesterday, an incident occurred where an Autonomous System (AS) advertised more than 7,000 prefixes that belong to...
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...
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...
Fixing packet loss: spending money to make money
As explained in our last blog post, packet loss and latency can seriously impact application performance. There's not...
Network latency and packet loss effects on performance
The triumvirate of network performance metrics are latency, loss and jitter. Today, we're going to take a look at how...