Currently viewing the tag: "routing"

Cisco: IP Policy Routing with IP SLA and EEM

By On May 31, 2010 · 6 Comments

Considering the same environment like in the post Cisco: Policy Routing with IP SLA, there is another way to achieve the same behavior using again IP SLA and EEM (Embedded Event Manager).

For those of you who are not so familiar with EEM please read http://www.cisco.com/en/US/products/ps6815/products_ios_protocol_group_home.html. You will find a nice explanation and some examples how to use EEM to achieve the desired result.

Now, going back to our example, please conside the same topology like in the previous [...]

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Cisco: Policy Routing with IP SLA

By On May 27, 2010 · Leave a Comment

Let’s assume that you have a Cisco router with 2 ISP connection. The first one it’s a 10Mbps connection with a decent latency and the second one it’s a 2Mbps connection with quite high latency.

Since you don’t want to load balance over this 2 connections for the obvious reasons described above, you decide to to use the 10Mbps connection as the primary link and the 2Mbps one as a backup, just in case that the primary link fails.

You have no dynamic routing protocol, just a [...]

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Cisco IP Routing Overview – Part IV

By On January 14, 2010 · Leave a Comment

Fourth part from IP Routing Overview.

All this material is produced by RouteHub Group consultants, so all the copyrights and greetings have to be directed to them. If was free shared on the Internet so, I hope that I’m not breaking any copyright rules here. All that i want is to make this material more visible on the Internet. This is true also for the more to come materials from them.

If you are curious who is

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Cisco IP Routing Overview – Part III

By On January 14, 2010 · Leave a Comment

Third part from IP Routing Overview.

All this material is produced by RouteHub Group consultants, so all the copyrights and greetings have to be directed to them. If was free shared on the Internet so, I hope that I’m not breaking any copyright rules here. All that i want is to make this material more visible on the Internet. This is true also for the more to come materials from them.

If you are curious who is

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Cisco: How to configure HSRP

By On September 25, 2009 · 3 Comments

In this post I proposed to discuss a little bit about Hot Standby Router Protocol and how it can be configured on a Cisco device. For this I have chosen the following topology:

I had in mind this scenario due to the fact that the traffic can take multiple paths in case of link being down and this give us the possibility to have a little bit of conversation on HSRP topic.
HSRP is defined in the document [...]

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CCIE R&S V4.0 Written: Beta Exam Announcement

By On August 12, 2009 · Leave a Comment

The beta version of CCIE Routing and  Switching Written Exam v4.0 (351-001) is available for scheduling at all worldwide,  Cisco-authorized Pearson VUE testing centers starting August 7, 2009 and continuing  through September 9, 2009.

Nevertheless the number of beta exams is limited, so as soon as all the seats are taken this beta test period will end, even if this is before September 9, 2009.

Candidates may schedule and take the exam on the same day.  The beta exam will [...]

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Cisco: The basics about VRF implementation

By On August 11, 2009 · 21 Comments

VRF, meaning Virtual Routing and Forwarding, is a technology implemented in the IP network routers that allows multiple instances of a routing table to exist on the same router in the same time. Since each VRF is independent, the same IP subnet can exist in 2 different VRFs. Basically you can overlap one IP address in 2 VRFs but without conflicting with each other. Even this is possible, I would not suggest [...]

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Routing + QoS + Security all free for you and your small business

By On July 9, 2009 · 2 Comments

OK, you catch me as this is not from Cisco, but is related to networking and security, so I believe it fit in the idea of this blog. What I’m talking about here?! Well, let’s assume that you are the IT guy of one small business or even your home network, and like all of us, you want what’s the best for your network. With today’s key words (even I don’t understand why) like saving, cost reduction, zero budget for new deployments no manager will [...]

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Cisco: OSPF conditional inject of a Default Route

By On June 16, 2009 · 5 Comments

I believe most of you are familiar how OSPF is injecting a default route in a normal area. If not, you can find here all the documentation that you need. Please be familiar with this concept before reading this article.

Now, let’s assume that we have the following topology (click on image to have a more detailed view) :

As you can see we [...]

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Two CCIE R&S Certification Webinars

By On May 11, 2009 · Leave a Comment

Source: https://cisco.hosted.jivesoftware.com/docs/DOC-4862

Cisco will conduct two webinar events on Wednesday, May 20, 2009 to describe recent enhancements to CCIE R&S certification and Cisco 360 Learning Program for CCIE R&S.
Attendees can choose from calls at 8:00 am and 7:00 pm PST.
Participants need only attend one event as content will be identical.

Registration information is as follows:

MEETING DETAILS

Meeting Name: CCIE R&S Refresh Date/Time: 5/20/2009 [...]

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