Posts Tagged ‘OSPF’
| posted in Cisco Networking | |
| by Reggle on December 1st, 2011 | tags: Cisco, GNS3, OSPF |
The topology above is an example network, consisting of four OSPF areas (one backbone, area 0) and one external EIGRP area. I’ve set up an IP addressing scheme using 10.0.0.0/8 for OSPF and 172.16.0.0/12 for EIGRP. In case you didn’t notice, the second part of the IP address is the same as the area number (10.x.0.0 for area x).
| posted in Cisco Networking, Technical | |
| by hunter_thom on May 10th, 2010 | tags: EIGRP, IPv6, IS-IS, MP-BGP, OSPF, RIPng |
The purpose of this article is to discuss and compare different methods of routing in IPv6. In particular, we will cover configuration of static routing with IPv6, RIPng, OSPFv3, IS-IS for IPv6, Multi-protocol BGP, and EIGRP. We will also go over the application of some basic troubleshooting commands, including show commands.
To begin, we will use the below topology.
| posted in Cisco Networking, Technical | |
| by Steve on January 23rd, 2010 | tags: BGP, challenge, GNS3, ICMP, MP-BGP, MPLS, OSPF, VRF |
I spent some time using GNS3 to build out a 3 router lab focusing on a single customer MPLS VPN. Everything went fine initially, OSPF came up, BGP with route reflectors were fine, LDP neighborships established, and I even saw VRF route advertisements across the network. The problem came when I tried to PING across the network on the VRF from one customer subnet to the other, I got nothing. I spent about an hour troubleshooting, looking up examples, and pulling out my imaginary hair before I figured out the problem. In this blog post I will present the lab as it was originally built for the sake of discussion and leave it up to you to figure out where I went wrong and why exactly it wasn’t working.
Here is the networking drawing as built in GNS3:
