Solved

BGP: Explanation for address-family ipv4 and vpnv4

Posted on 2010-09-19
2
6,152 Views
Last Modified: 2012-06-27
Experts,

Jr. Engineer for a service provider wondering about BGP. I am looking to solidify my understanding of ipv4 and vpnv4.
I was looking over our PE routers and see address-family ipv4 and address-family vpnv4.

Can someone explain to me what is the difference between the two? I've already read about the difference but would like to hear it from another point of view.
Is ipv4 is used to exchange regular ipv4 routes between bgp peers? vpnv4 is used to exchange vrf routes?
 
0
Comment
Question by:trojan81
2 Comments
 
LVL 14

Accepted Solution

by:
Otto_N earned 400 total points
ID: 33714911
IPv4 addresses is the usual IP address: NN.NN.NN.NN
VPNv4 is the IP address, but with the route-distinguisher appended: AS:RD:NN.NN.NN.NN

You are correct: "address-family ipv4" is configured to exchange IPv4 addresses between nodes (which can be used in the backbone of the ISP for infrastructure connectivity) while "address-family vpnv4" is used to echange routing information in the specific VPN (i.e. the subnets reachable inside the particular VPN, most likely the service offered to your customer).

To put it another way:  "address-family ipv4" exchange IPv4 routes in the Global Routing Table between BGP peers, while "address-family vpnv4 vrf <NAME>" exchange IPv4 routes in the specified VRF instance between peers.

Let me know if you need more info...
0
 

Author Closing Comment

by:trojan81
ID: 33732281
Makes sense. well done!
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

The article explains the protocols and technology which is involved when two computers on different TCP/IP networks communicate with each other. In the diagram, a router is used to segregate two networks. The networks are 192.168.1.0/24 and 192…
Please see preceding article here: http://www.experts-exchange.com/Networking/Operating_Systems/A_11209-Root-Bridge-Election.html Figure 1 After Root Bridge has been elected, then what?..... Let's start by defining a Root Port in la…
Viewers will learn how to properly install and use Secure Shell (SSH) to work on projects or homework remotely. Download Secure Shell: Follow basic installation instructions: Open Secure Shell and use "Quick Connect" to enter credentials includi…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

822 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question