Learning BGP Module 1 Lesson 4: Intra-AS Models And Route Reflectors – Video
This lesson in Russ White’s BGP course delves into synchronization within an Autonomous System (AS) and confederation within an AS. It also discusses route reflectors, including how they prevent loops, route reflector clients, route reflector multi-path, and multi-path pros and cons. Russ White is a network architect, author, and instructor. You can subscribe to the […]
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BGP Route Reflector in Plain English
BGP Route Reflector in Plain English, in this post, I will explain you the BGP Route Reflector basics, after you read this post, you will be able to answer many questions regarding BGP Route Reflectors.
I am explaining this topic in deep detail in my Onsite CCDE , Live/Webex CCDE , Self Paced CCDE and also my specialized “BGP Zero to Hero” course.
Outline of this post is as below.
- What is BGP Route Reflector ?
- Why BGP Route Reflector is used ?
- What is the alternate methods ?
- Different type of BGP Route Reflectors
- Benefits of BGP Route Reflector
- Problems with the BGP Route Reflector
- BGP Route Reflector Redundancy
To have a great understanding of SP Networks, you can check my new published “Service Provider Networks Design and Perspective” Book. It covers the SP network Technologies with also explaining in detail a factious SP network. Click here
What is BGP Route Reflector ?
A route reflector (RR) is a network routing component for BGP (RFC 4456). It offers an alternative to the logical full-mesh requirement of internal border gateway protocol (IBGP).
Above is the wikipedia definition of BGP Route Reflector. Let’s extend the definition a bit.
BGP Route Reflector Continue reading
Short Take – BGP Optimal Route Reflection
BGP Route Reflection solves a fundamental problem in iBGP operation but introduces some tradeoffs to consider when implementing. In this Network Collective short take, Russ details these tradeoffs and some potential ways to mitigate unintended consequences.
Russ White
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BGP Route Reflection diagram
I had plans to cover Nokia (Alcatel-Lucent) BGP Route Reflectors (BGP RR) in a full-featured post, but… But a lot of new stuff suddenly hit me as I joined Nuage Networks team. Ok, lyrics aside, during my preparation for BGP exam I noticed that BGP route reflectors behavior defined throughout several chapters and there was noSite to Site IPSEC VPN between NSX Edge and Linux strongSwan
The following post will show how to configure a L3 VPN between VMware NSX Edge and a Linux box with strongSwan. L3 VPN with Pre-Shared Key (PSK) authentication The first example will show a L3 VPN configured with a Pre-Shared Key. The NSX Edge configuration is pretty simple. Open the Web Client and go to […]Various SSL errors while using VMware Web Client or vClient
Many errors can occur while using a misconfigured client. Below you can find the errors I found. Opening console from Web Client SSL verification failure for "vcenter1.example.com" due to a host thumbprint mismatch: stored thumbprint "8d:29:ae:69:87:e5:cc:a0:ff:01:51:25:84:8a:b4:d3:b5:a3:55:33" does not match certificate thumbprint "5B:E9:36:23:44:F0:4D:E5:6A:F3:7E:BC:4F:FE:9D:0D:93:64:03:E0". Opening console from vClient Unable to connect to the MKS: Login (username/password) incorrect. […]BGP Route Reflector Clusters
BGP Route reflectors are used as an alternate method to full mesh IBGP and helps for scaling. BGP Route reflector clustering is used to provide redundancy in an RR design. Route Reflectors and its clients create a cluster. In an IBGP topologies, every BGP speaker has to be in a logically full mesh. Route reflectors… Read More »
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VXLAN on VMware NSX: VTEP, proxy, Unicast/Multicast/Hybrid mode
Virtual Extensible LAN (VXLAN) is a network which help to build an overlay network and it’s the base of network virtualization. In simple words, VXLAN encapsulates Ethernet frames on a UDP routable packet. With VXLAN a single L2 segment can span L3 boundaries. Moreover VXLAN overcomes VLAN limits: 802.1q standard define a maximum of 4094 […]Configuring a load balancer with VMware NSX
In the previous post a NAT has been configured to allow access from external networks: Now the edge router will act as a load balancer too: connection to the edge router with destination port 2222 will be balanced on both internal VM using the port 22. Go to “Networking & Security -> NSX Edges”, […]Configuring NAT and firewall on a NSX Edge Router
On a previous post the edge router has been connected to external network: In this post NAT and Firewall will be configured to allow SSH access to VM1 from external networks. Go to “Networking & Security -> NSX Edges”, double click on the edge router and follow “Manage -> NAT”. Add a DNAT role so […]Connecting Edge Router to physical LAN using VMware NSX
On a previous post an Edge router has been deployed and configured with OSPF. Now the edge router must be connected to external networks: An uplink interface needs to be bound to a PortGroup not configured for NSX. In other words a PortGroup named 172.31.30./27 has been manually added to the same Distributed vSwitch used […]Configuring OSPF between Logical and Edge routers on VMware NSX
On previous posts the following topology has been deployed: The next step is adding an Edge router which can manage external traffic. On a next post the Edge router will be bridged to a physical network. The expected topology will be the following: Open the Web Client and go to “Networking & Security ->Logical Switches” […]Distributed routing on VMware NSX
On the previous post a NSX environment has been configured with three isolated logical switches. In this post a distributed router will be added to route packets between logical switches inside tenant 1. Open the Web client and go to “Networking & Security -> NES Edges” and add a new logical (distributed) router: Configure username, […]VMware NSX: a short introduction and HOWTO install it
NSX is the SDN solution by VMware. NSX is available as: NSX for vSphere (NSX-V) NSX Multi-Hypervisor (NSX-MH) NSX-MH is NSX for Multi Hypervisors (ESXi, KVM, Xen, Hyper-V). This post is focused on NSX-V. Acronyms DFW: Distributed FireWall DLR: Distributed Logical Router LIF: Logical InterFace UWA: User World Agent VDS: VSphere Distributed Switch VIB: VSphere Installation Bundle VNID: VXLAN […]Switching is not working on VMware NSX
In this scenario we have three VMs deployed on a NSX vSwitch with VNI 5002. Two are running on the same hosts and they can ping each other, the other one is running on a separated host and cannot ping the other VMs. Check if at least one interface is configured for VXLAN: ~ # […]No VMware NSX manager connected
If the VMware vSphere Web Client shows no connected NSX Manager, try to restart the NSX Manager service. The issue can happen if the vCenter is restarted or starts after the NSX Manager. Connect to the NSX Manager and in the summary view stop and restart the NSX Management Service : After a while the vCenter […]Moving a powered off VM from CLI
In this short post we’ll see how to move a powered off VM from one host to another one using CLI commands. The first step is list the required VM: ~ # vim-cmd vmsvc/getallvms Vmid Name File Guest OS Version 4 vcenter1 [esx1_datastore] vcenter1/vcenter1.vmx windows7Server64Guest vmx-08 The VM ID is 4. Let’s check the power […]Load balanced ESXi cluster with Host memory usage alarm
Sometimes a DRS enabled cluster could be in the following situation: The cluster is balanced even if three hosts triggered the host memory usage alarm: There is no recommendation, so the DRS is working. How can be three host with high memory usage? The answer is simple: the graph is showing consumed memory, […](Visited 12 times since 2013-06-04, 12 visits today)
Automatic logon to vCenter using vMA/SDK for Perl
One of the most useful appliance for vSphere administration is a Linux based VM called vMA (vSphere Management Assistant ). It’s a simple SUSE Linux installation with the vSphere SDK for Perl installed. Both method will provide useful tools like esxcli, vmkfstools, vicfg-* and so on. Each command can read credentials as parameters: $ esxcli --server vcenter.example.com --username example\vsphereadmin […](Visited 4 times since 2013-06-04, 4 visits today)