FirstDigest

Cisco 2600: How many IPv4 prefixes can fit in BGP table

Calin — Sun, 10 Mar 2013 19:40:16 +0000

Today I wanted to try and see how many IPv4 prefixes can a Cisco 2600 accommodate in BGP table both global and in VRF table. I have lying around a Cisco 2621XM with 64MB of RAM, so I said to stress...

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CCIE Home Lab, what to do when your router has too little Flash space for IOS

Calin — Sat, 09 Mar 2013 13:33:55 +0000

I already explained in an older post my home lab for CCIE preparation. My BB1-BB3 routers are Cisco 2600 series and the rest of R1-R6 are emulated with Dynamips. The only problem is that one of the...

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Overlay MPLS over provider backbone

Calin — Sat, 09 Feb 2013 15:11:31 +0000

Imagine that you have two or more sites which you want to connect together using MPLS technology. You cannot afford dark fiber and your Service Provider cannot offer you L2 connections of any kind....

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vCSA Web Management Network error

Calin — Sun, 27 Jan 2013 11:02:06 +0000

A few days ago I installed two additional NICs in my server that handle the virtual machine for vCenter Server Appliance (vCSA).After the NICs installation, the Management web interface for vCSA was...

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Cisco: IPv6 over IPv4 MPLS (6PE)

Calin — Sun, 30 Sep 2012 18:46:21 +0000

Let’s assume that you have an IPv4 core backbone on which you did enable MPLS. Your customers are connected to your PE routers and they need to have IPv6 reachability between their sites. To...

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MSFC, PFC and DFC on Cisco 6500 series

Calin — Tue, 25 Sep 2012 16:30:12 +0000

If you are in routing and switching industry, it’s almost impossible not to hear words like MSFC, PFC and DFC in relation with Cisco Catalyst 6500 series, chassis, supervisor and modules. If...

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[Twitter IT] Cisco Live 365 – Cornerstones of CCIE Success

Calin — Thu, 20 Sep 2012 10:11:58 +0000

Cisco Live 365 describe this as: “Anthony Sequeira, CCIE, CCSI educates students on four key cornerstones for success in the journey to CCIE. These cornerstones include technical knowledge,...

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Cisco vs Juniper: different eBGP behavior

Calin — Wed, 19 Sep 2012 21:37:13 +0000

Last week I had to troubleshoot a problem about eBGP peering with an external provider and I think my findings will be interesting for some of you out there. Let me start with some background...

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[Solution] Speed / Duplex auto-negotiation fails between Cisco and Tandberg

Calin — Wed, 18 Jul 2012 13:33:26 +0000

In the last weeks I was working closely with a Cisco Telepresence team to identify a issue regarding poor performance of the video systems. We did find pretty quickly the issue as being the failure...

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[Cisco Live] SDN controller interview

Calin — Wed, 18 Jul 2012 12:55:23 +0000

The original name of this video is “SDN controller DEMO”. I think the “demo” word there is a bit inappropriate used, as actually is more like a Cisco marketing video than...

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