Cisco buying tips: Catalyst G and Catalyst X Switches

In Cisco land, finding the right switch without any guidance is like wandering into a wild jungle without a map. Cisco is known to have dozens and dozens of variations of the same switch in the same line of switch. For example, even though WS-C3560X-48T-L and WS-C3560G-48TS-S are both in the same Catalyst 3560 family, the X is vastly superior than the G in terms of forwarding bandwidth. And this often times make our clients confused as to what is the exactly the difference between the two. With any other manufacturer, a huge difference in forwarding bandwidth usually makes them completely different tiers of switch by one using a completely different number, and not some variations of the number.

Whatever it is that Cisco does not want to or not able to use a different number due to other products occupying the space, client should be extremely tentative when buying Cisco’s Catalyst switches. Even with just a tiny letter change, it could mean the right switch or a completely incompatible switch. Today, we’ll examine the difference in the X and G version of the 3560s.
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VMware buys Nicira – $1.05 Billion: SDN the future of networking?

VMware took the IT industry by surprise yesterday with an announcement to acquire Nicira, a network visualization start-up for $1.05 billion.

Network Virtualization, or Software Defined Networking (SDN) is growing steadily, but it is still considered as a niche market. According to an interview by New York Tiems, analyst Brent Bracelin from Crest Security estimates the entire SDN industry is to generate about $100 million in revenue for 2012, but can grow to $2 billion in five years.

With VMware paying 10 times the amount of the entire industry’s revenue this year for Nicira, a lot questions will be asked: is this an over-valued acquisition or a game changer for VMware.

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Buying the right Chassis and Card that fit your needs: Cisco 6500 and SUP

We sell a lot of 6500 and 6500-E, as well as their supervisor engines, and often times clients will purchase simply because of the lower upfront cost. However, as networking and bandwidth requirement will only grow larger, it may be wise to absorb the larger upfront cost and enjoy the lower overhead that follows when in need of maintenance and upgrade.

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JUNOS QoS/CoS: Relationship between minimum and maximum bandwidth

How often do you get asked, “Hey John, can we get like minimum 500 kbps speed on this line?”

And when you hear this, you scramble to find documentation regarding how to set minimum bandwidth. And this often leads to confusion for some network admins that just started. In fact, the concept of “minimum bandwidth” is trivial. There is a reason for this.

When people think about minimum bandwidth, they think of the “at least”/”guaranteed” bandwidth; and in terms of QoS/CoS in JUNOS, it is essentially the “maximum bandwidth” or the bandwidth-limit when configuring a policer. This is, if you are looking for aggressive QoS policies since using policer will place strict policies on traffics (dropping packets). You can also configure a more lenient policy using shaping but for the sake of ease to demonstrate and discuss this topic, we’ll strictly talk about bandwidth limits and not shaping.
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