Currently viewing the category: "Cisco-switching"

MSFC, PFC and DFC on Cisco 6500 series

By On September 25, 2012 · Leave a Comment

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 you didn’t yet, you’re not almost there, working with large enterprise environments.

Even if I see an increasing [...]

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InterVLAN routing using Private VLANs

By On September 23, 2011 · 3 Comments

Private VLANs  is one possible solutions for service providers to offer secure connections to their customers and avoid inter-vlan communication in the same switched environment.

I’m sure that you heard (and most probably practice already) InterVLAN routing. When it comes to Private VLANs the routing part may be a bit tricky. Keep in mind that [...]

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Cisco: Port-channel load-balancing explanation [Part II]

By On September 30, 2010 · Leave a Comment

As I promised in Part I of this article, here is the second part covering the port-channel load-balancing method explanation. If you didn’t know what I’m talking about, please be sure that you have read the first part of this article. Everything remains the same in this scenario. We have 3 [...]

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Cisco: Port-channel load-balancing explanation [Part I]

By On August 30, 2010 · 7 Comments

Port-channel (or etherchannel) is a great way to increase the transport capacity between 2 switches or between a switch and an end device that suport load balancing (e.g. server). Today I don’t want to focus on how the Port-channel are configured, but more on how they load-balance the traffic over the multiple interfaces included in [...]

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Cisco: How to use CEF for load-balancing

By On June 29, 2009 · 5 Comments

According to Cisco’s website, Cisco Express Forwarding (CEF) is advanced, Layer 3 IP switching technology. CEF optimizes network performance and scalability for networks with large and dynamic traffic patterns, such as the Internet, on networks characterized by intensive Web-based applications, or interactive sessions.

The term Load balancing describes a [...]

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Cisco: Layer 2 traffic filtering

By On November 27, 2008 · 1 Comment

Layer 2 traffic filtering can be very useful when you want to drop packets closer to
the source because you can do this on L2 next-hop which is the switch where the
devices are connected. Based on mac-address, Layer 2 filtering can be apply using
one of the two most common method: [...]

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Interface macro command on a Cisco switch

By On November 16, 2008 · 1 Comment

From the beginning let me tell you that I don’t see very useful this command, as I prefer to use “interface range…” syntax, but since I saw it as a requirement in one of the task for CCIE RS lab exam, and maybe somebody will find it usable in real environment, I said I should [...]

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Limit traffic on a Cisco switch L2 port with minimal configuration

By On November 14, 2008 · 1 Comment

Let’s say that somebody (or some task in a test) ask you to limit the inbound traffic on a switch Layer 2 port by using minimal configuration possible. I must say that in the first steps I failed this task miserable, but actually is very simple to do it.

I will use a plain layer [...]

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