Posts Tagged ‘OSPF’

Cumulus Linux on Dell Switches: Spine-Leaf Architecture & OSPF on Unnumbered Interfaces

Sunday, January 18th, 2015

In a prior blog, Cumulus Linux on Dell Networking Switches, I demonstrated how to install Cumulus Linux on a Dell S6000 switch and do some basic configuration. In this blog, I’ll demonstrate how to configure routing on Dell switches running Cumulus Linux. The example covered demonstrates a Spine-Leaf architecture with OSPF on unnumbered interfaces. In this example 2 x Dell S6000-ON and 2 x Dell S4810-ON switches [Cumulus Linux 2.1.1] are utilized. The lab setup is depicted by the network diagram below. (more…)

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Network Virtualization with Dell and VMware NSX [Video]

Thursday, August 28th, 2014

Check out my latest Dell Networking video on Network Virtualization with Dell and VMware NSX. You can view it on the Dell VMware wiki site, the Dell YouTube channel, or see the video embedded below via direct link. (more…)

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Dell Networking Extends Multipathing Capabilities with VLT Routing

Saturday, October 12th, 2013

Dell Networking recently released enhancements to their VLT multipathing technology in FTOS 9.2 now available on S4810, S4820T, and Z9000. For a quick primer on Dell’s VLT technology read my prior blog post here. The most noticeable enhancement is the support of layer 3 routing protocols over VLT. Additional enhancements include the ability of VLT peers to synchronize ARP entries learned from non-VLT interfaces, support for IPv6, and the ability to synchronize multicast routing tables between peer VLT ports. In this blog, I use 4 x Dell S4810s [FTOS 9.2] and 1 x Dell S60 (for a management switch) [FTOS 8.3.3.9] to demonstrate routed VLT.
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Deploying a Dell PowerEdge M1000e Chassis with Dell Blade Servers and Dell MXL Blade Switches

Monday, June 10th, 2013

In this blog I demonstrate how to setup a Dell M1000e chassis with a Dell PowerEdge M620 server and two Dell MXL blade switches [FTOS 8.3.16.2]. The Dell M1000e chassis is part of a larger network composed of three Dell S4810 switches [FTOS 9.1]. Windows Server 2008 R2 Enterprise is installed on the server. Below is the network diagram for this lab. (more…)

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Multi-Area OSPF in a Mixed Cisco and Dell Force10 Environment

Tuesday, November 20th, 2012

In this lab I use one Cisco 2621XM [IOS 12.4(2)T], one Cisco 2621 [IOS 12.3(18)], one Cisco 3660 [IOS 12.1(1)T], one Cisco 3640 [IOS 12.1(2)T], one Cisco 3550-24PWR-SMI [IOS 12.2(44)SE6], one Dell Force10 S60 [FTOS 8.3.3.7], and one Dell Force10 S50N [FTOS 8.4.2.6] to demonstrate multi-area OSPF in a mixed environment of Cisco and Dell Force10 switches. Below is a diagram of my lab setup. (more…)

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Multi-Area OSPF – Redundancy, Route Summarization, and LSA Filtering

Monday, July 9th, 2012

In this lab, all routers except for R4 and R5 are Cisco 3725 routers [IOS 12.4(15)T10]. Routers R4 and R5 are Cisco 7200 routers [IOS 12.4(24)T]. Below is the network diagram for this lab.
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Configuring OSPF with Multiple Areas

Friday, June 1st, 2012

In this lab, I use three Cisco 3725 routers [IOS 12.4(15)T10] to demonstrate how to setup OSPF with multiple Areas. Below is the network diagram for this lab. (more…)

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EIGRP and OSPF Redistribution on Cisco Routers

Tuesday, February 7th, 2012

This was a quick lab I threw together which I thought was pretty cool. In this lab I use five Cisco 3725 routers [IOS 12.4(15)T10] in which I have two groups of routers each on a different subnet and running a different routing protocol. A router is used to connect the two different subnets and EIGRP redistribution and OSPF redistribution allow nodes on the two different networks running different protocols to talk to each other. Below is the network diagram of the lab setup. (more…)

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OSPF Explained and Useful Troubleshooting Commands

Wednesday, January 4th, 2012

Open Shortest Path First (OSPF) is an open standard link-state routing protocol that supports multiple equal-cost routes to the same destination (four by default). OSPF constructs a shortest path tree and then updates the routing table with the best paths. In this blog I I will be explaining OSPF in the context of OSPF on Cisco routers, so I will be using Cisco IOS command syntax. For some of the commands I have included screenshots from a Cisco 2621XM [IOS 12.3(16a)] router. (more…)

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