Hold-Queue & Hardware TX Ring: TX-Ring DEFAULT on 1841 (128) packets on a FastEthernet interface “tx-ring-limit X” verify with “sh controller fa 0/1 | in tx” FIFO Ingress queue is 75 packets by default and 40 packets on an 1841 FastEthernet interface “hold-queue X in|out” verify with “sh interface fa0/1 | in queue” Keep in mind that the software queue is only invoked when the hardware (TX-RING/FIFO) is full. CPU/packet spikes can tie up CPU cycles causing the router to use…
Preface: To clear old entries in the multicast table, use “clear ip mroute *”. This command usually will allow changes to be sync:ed, but not always. In the worst case scenario, you may have to reload the device. Modifications to a working multicast environment is not recommended if you cannot interrupt traffic forwarding. Be sure to schedule maintenance window in a REAL production environment. PIM: Signaling protocol that uses the unicast routing table to preform RPF checks. Dense mode: Flood to all multicast enabled interfaces and downstream routers prune…
Not sure if anyone really cares, but I’m a huge NeoGeo fan/collector.. Today I found quite a surprise at a local gaming store. English version of SvC Chaos (SNK vs. Capcom) for the NeoGeo AES. Needless to say, I did not even hesitate for a second and bought it. It’s in pristine condition and I’ll probably spend the rest of the night obsessing on how beautiful the condition is. Enjoy these pics and Thank You Play N Trade! Game Data: …
Braveheart spoof by Cisco marketing. http://www.cisco.com/go/rightnetwork
Enjoy this short (3min) cartoon. Link to YouTube Video
I forgot about the blackout until I was looking something up today. Amazing considering how much I use Wiki. Let’s face it, Wiki has become today’s de-facto encyclopedia. Without it, I’d be lost. Tell Congress: Don’t censor the Web! Google Action Page: http://www.foxnews.com/scitech/2012/01/18/wikipedia-goes-dark-for-24-hours-to-protest-us-web-piracy-bills/
So, first a little history on Spanning tree protocol (STP). Based on an algorithm created by Radia Pearlman in 1985. http://en.wikipedia.org/wiki/Radia_Perlman Became a standard IEEE protocol in 1990. Still widely deployed. Flavors of spanning tree. 802.1d (ieee), 802.1w (rapid), and 802.1s (mst). Evolution of STP, Cisco vPC (2-way non blocking, still requires STP) and Fabric Path (eliminates STP completely). TRILL is a standardized version of Fabric Path. Both TRILL and Fabric Path utilize a link state protocol (IS-IS) as their loop prevention method. Specific Cisco enhancement to 802.1d (prior to 802.1w):…
Worried about the locked/encrypted bootloader? Have no fear, viperMOD/NachoRoot is here. Source: Engadget.com
Most of you that know me are well aware about my excitement for the Asus Transformer Prime this month. I have been waiting since the announcement for a tablet utilizing the Tegra 3 (Quad Core) mobile chipset. Now I find out even better news today thanks to Engadget. ICS will be release on the 12th! Man this is double awesomeness. Share your thoughts. Will ICS work well on a tablet? Should it have dual modes/personalities to detect phone vs. tablet…
Cisco impresses with UCS: If you’re tempted to think of Cisco‘s Unified Computing System (UCS) as just another blade server — don’t. In fact, if you just want a bunch of blades for your computer room, don’t call Cisco — Dell, HP, and IBM all offer simpler and more cost-effective options. But, if you want an integrated compute farm consisting of blade servers and chassis, Ethernet and Fibre Channel interconnects, and a sophisticated management system, then UCS might be for you….