Secure branch connectivity is a critical business requirement in most of the enterprise campus network architecture. Most of the organization prefer to keep their business critical information safe and secure from site to site without vulnerable to eavesdropping.
Nice little feature I saw while surfing the Internet. This can be used to remove unnecessary connected routes from OSPF domain databases. If you use this in OSPF, you will lose interface IP addresses from your routing table. This saves lot of space from routing table if you have large OSPF domains consisting of hundreds of thousands OSPF speakers.
router ospf 1
This very easy to implement with single IOS command under the router configuration mode.
Sham Links or Sham-Links is another interesting technique in modern MPLS VPN recipes. Sham links are used to maintain continuos backbone connectivity over MPLS VPN cloud. Continue reading
Today wee are going to cover few basic technologies while building simple MPLS VPN. Our VPN has not fancy configuration, it would be simple VPN with single Route-Distinguisher and Route-Target. However, our underlying IGP will be IS-IS, which provides connectivity for iBGP neighbor relationship between PE routers.
In this exercise we are going to create BGP free service provider core network with MPLS. First of all let’s try to identify the issue behind BGP not running in every router in SP core. We are going to use following Layer 3 illustration through-out the exercise.
Please use "ip ospf network point-to-point" in Loopback Interfaces. Please look into comments area for background and troubleshooting.
Today let’s try to build simple MPLS VPN cloud. We are going to create VPNs for two independent customers. IP address space is overlap between two customers.
This article discusses file system expansion in a live environment. RHEL 6 comes with very high performance file system developed by SGI called XFS. Online file system growing is a supported feature in XFS.
Now we have pretty good Primary DNS server configured in DMZ3 server. Let’s go for Slave DNS server configuration.
We are going to create BIND DNS Primary/Slave setup on RHEL 6. IP Addressing is illustrated in following diagram.
After RHEL installation when we try to install software package, we usually get following message. This is due to our installation is not registered with RedHat Network.