Archive for the ‘Certifications’ Category

Top Ten IT Certs

| September 17th, 2011 | 3 Comments »
toptencerts

According to TechRepublic.com, SonicWALL's CSSA edges out Cisco's CCNA coming in at 5 and 6 respectively. I covered the CSSA course earlier this year that you can read here: SonicWALL CSSA I've honestly felt the last couple of years, Cisco has branched out a bit too far, this allowed other competitors into the market. With the recent downsizing ...

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When “deny any” doesn’t deny all!

| December 27th, 2010 | 9 Comments »

I recently came across this discussion and thought I'd shed some light. A user wants to deny all traffic outbound a specific interface. Let's say it is ethernetO. The best way to test this is to create an ACL and apply it to your interface outbound, and ping out from an internal device. You won't ...

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Implementing Cisco Switched Networks (SWITCH)

| July 9th, 2010 | 5 Comments »

This is a review of Implementing Cisco Switched Networks (SWITCH) Foundation Learning Guide. Written by CCIE's Richard Froom CCIE# 5102 and Erum Frahim CCIE# 7549 and Balaji Sivasubramanian. This is an excellent book on switching fundamentals. It clearly explains VLAN's, how and where to use them. How the old 80/20 rule is now 20/80. Security topics ...

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Random Blog Images

no keepalive up/up

| June 25th, 2010 | 9 Comments »

I learned this new trick from reading an old CCIE book. If you want to keep an interface with up/up status with no cable connected to it, especially for simulation purposes all you have to do is disable the keepalive like so: Router#sh ip int brie Interface                  IP-Address      OK? Method Status                Protocol FastEthernet0/0            unassigned      YES unset  administratively down ...

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VLAN Access Lists Lab#01

| June 23rd, 2010 | 8 Comments »

You can learn all you want about ACL's until you're blue in the face, but what if the traffic never traverses an interface? How do you control traffic within a VLAN? That's where VACL's come in. VLAN access-lists can handle packets within a VLAN since there are no actual IN/OUT direction to be applied as you ...

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Frame Relay LMI Autosense Lab#02

| June 21st, 2010 | 2 Comments »

In this lab, we're going to take a look at autosensing the LMI signaling protocol. As we've seen in Lab#01, you need this to be correct in order to bring the link up. We'll start with the frame relay switch configuration. FRAME RELAY SWITCH RTR-3620#config t RTR-3620(config)#frame-relay switching RTR-3620(config)#int s1/1 RTR-3620(config-if)#encapsulation frame-relay RTR-3620(config-if)#clock rate 64000 RTR-3620(config-if)#frame-relay intf-type dce RTR-3620(config-if)#end RTR-3620#sh run int s1/1 Building configuration... Current configuration ...

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