IPv6 hardware support: new Cisco Catalyst 4948E Ethernet Switch

Cisco's new hardware: Catalyst 4948E Ethernet Switch.

How many subnets are in your network? A quick estimate

A quick method to estimate the total number of subnets in your network.

Cisco's ClearAir technology for Wireless LAN: my understandings

A whole new Wireless LAN security feature from Cisco.

BGP sample practice, in the new Packet Tracer 5.3

I created this practice to test the Packet Tracer 5.3 features of BGP.

Possible actions to begin with for entering IPv6 era

Internet Protocol Version 6 (IPv6) is no longer a brand new technology. Internet communication system workers like us would be expected to do well on IPv6 deployment, without doubt.

After Microsoft Windows Vista was delivered, however, we could no longer excuse ourselves procrastinating on IPv6 deployment.

In fact, it would be quite difficult now to find non-IPv6-capable client hosts! From computers with FreeBSD, Linux, Microsoft Windows, Apple (OS X), and mobile phones such as Nokia phones (Symbian OS), Windows Mobile, Google Android, and even to game consoles such as Nintendo Wii, Sony Playstation 3, all of them already support IPv6 right now!

We could have lived in a "Pure IPv6" world today, if the Internet were fully ready for IPv6. What a pity!

New CCNP Certification: Save some money before July 31, 2010

CCNP certification requirements will be revised after July 31, 2010. You will have to pass 3 new exams to get CCNP certified:

• ROUTE (original, BSCI)
• SWITCH (original, BCMSN)
• TSHOOT

Since the new CCNP does not count ISCW and ONT, your passed result of ISCW or ONT will remain valid only before July 31, 2010. BSCI and BCMSN, on the other hand, will still be counted as ROUTE and SWITCH respectively.

I think I found one timely approach to get your same CCNP with less costs!

Using "peer-group" shutdown to prepare BGP peer configurations without bothering

I was doing a BGP lab with my students.

I wanted to pre-configure some BGP neighbors, and I wanted all neighbor sessions to start at once only by some simple commands. Furthermore, I do not want to bother my students by retrying BGP neighbor connections before they completed their BGP neighbor configurations.

I came up this small trick to achieve above goals: