For over 18 years network professionals have turned to Observer, Network Instruments' flagship deep-packet analysis solution that boasts powerful application analysis, expert analysis, stream reconstruction, and trending with a 64-bit multi-threaded architecture. Our most widely used product is the GigaStor Packet Recorder solution. With up to 12 Gigabit or 10 Gigabit capture ports, it stores up to 5 PB’s of network data for days, weeks, or months, and allows administrators to rewind, analyze, and troubleshoot any issue.
Other Network Instruments solutions include the Observer Reporting Server, providing users with high-level, aggregate, enterprise-wide views, and packet level drilldown. The Observer Infrastructure is our newest solution, delivering comprehensive infrastructure tracking with issue prevention capabilities.
For more information, visit www.NetworkInstruments.com
South Central Region Sales Mgr
Network Instruments, LLC
972.821.2480 | Mobile
In the spirit of the relating to this month’s continued discussion topic (Multicast networking - PIM), Consider this bit of information to help remember the differences between PIM-DM and PIM-SM:
PIM-DM (Protocol Independent Multicast-Dense Mode) functions/operates like the Coupon Savers envelope you get in the mail. The source tree (Coupon Savers) thinks that everyone within a range of zip-codes (think of the zip codes as subnets) wants to receive their postal mail packet. By virtue of unknowingly having your mailing address sold to source tree – Coupon Savers (USPS subscribes to the Coupon Savers multicast group on your behalf by selling your mailing address in a blind dump list), you start receiving the Coupon Savers envelope of various content on a regular basis. You can stop the delivery by sending a request directly to Coupon Savers to cease “transmission”, which would be like a prune message. If you don’t do so, you will continue to receive the mailings because the source tree thinks you want the transmissions by virtue of being part of the subnet (zip code) that is blasted with their mailers.
Coupon Savers issues the command: ‘IP Multicast-Routing’ in their Sales department, and the Marketing department issues the command: IP PIM Dense-Mode on their Interface with the US Postal Service. The US Postal service issues the same commands on their system (Sales department and letter sorting facilities)
Now, PIM-SM (PIM-Sparse Mode) functions in the opposite premise. You subscribing to the DFW-CUG newsletter is a method of relating to this. The DFW-CUG Newsletter doesn't just get sent out to every soul on the Internet with an e-mail address. Instead, an individual request has to be made. Once the subscription request to the DFWCUG membership portal is done, then monthly mailers go out electronically to only those individual registrations. The RP (Rendezvous Point) would be your e-mail provider, who forwards your request to the DFWCUG member database. The DFWCUG Database would be considered the Core-Based Tree. You get pruned from the e-mail blast that is sent each month when one of two events occur: You either ask to be removed from the list, or your e-mail address registered with DFWCUG becomes invalid – i.e., mailbox full, e-mail address no longer recognized by mail domain because it was deleted, etc.
There are a few more factors to the functioning of both PIM-DM and PIM-SM, but hopefully this gives you a fair handle this specific portion of Multicast! I am quite sure Beau will do a much better bang-up job of clearing the muddy waters. <grin>
For Study Groups, It looks like everyone is either already obtained all their desired certifications (uhh, no.), or the summer break has been on extended leave.
If you are know of someone that is interested in a study group, or would be interested in leading a study group, have them ping my e-mail box!
Leading a study group does NOT mean you teach the group! A study group leader simply takes the responsibility on of coordinating meeting times and places, and helps keep the group motivated towards the end goal (Passing a Certification Exam!!). The Bonus for a group leader is that THEY choose the source of study and make the outline of study objectives, matching them to a flexible time line. The leader makes the plan, and the group executes the plan.
I have had only a couple of fellow Packet Heads show interest in a study group over the past several months. Surely fear is not the factor keeping your dreams and ambitions at bay!
Let’s get this party started and see some DFW-CUG members grow in their pursuit of Cisco Certification!
See you on October 3, 2012 at the Richardson Cisco Campus!!
Juniper plotting open source alternative to Cisco, VMware SDN controllers
SUNNYVALE, Calif. -- Juniper is working with other industry players on an open source-based controller for software-defined networks (SDN) that would be an alternative to proprietary offerings from VMware and Cisco.
Juniper hopes to have an open source SDN controller emerge as a de facto standard that's broadly supported by the industry, much like Linux, Apache and Hadoop have become in open source operating system, Web server and big data analytics, said Bob Muglia (pictured), executive vice president of Juniper's Software Solutions Division. He does not consider current open source SDN controllers, like Floodlight, Nox, Trema and others, to have attained that status yet.
"We think the likely thing and the best thing for the industry is to have an open source controller emerge that becomes a third standard controller," Muglia said in an interview with Network World this week. "One that is available broadly across companies and supports the broad set of capabilities that are needed. That has yet to emerge. And we are looking closely and working with a number of players in the industry to determine how it is likely to emerge."
COME ONBOARD! SDN bandwagon rolls ahead
TECH EXPLAINER: Software-defined networks
A couple of the other participants Muglia mentioned are IBM and Microsoft. Muglia was a longtime Microsoft executive before moving to Juniper a year ago.
Reprinted from Network World - By Jim Duffy 9/14/2012, Network World.
- November - UCS
- December - Network management - Tools and Techniques
- January - open