• Categories

  • Best practices
    • Real World
  • Other
  • Q&A
    • Load Balancing
  • Routing & Switching Lab
    • BGP
    • CATALYST
    • EIGRP
    • FHRP
    • FRAME-RELAY
    • IP Services
      • NAT
    • IPV6
    • IRDP
    • MPLS
    • Multicast
    • ODR
    • OSPF
    • QOS
    • Redistribution
    • RIP
    • Security
  • Troubleshooting
  • Uncategorized
  • Virtualization
  • VOIP
  • VPN

• Blog Stats

  • 60,871 hits

• Global visitors

  

• US visitors

  

• CCIE Jobs – Metro NY area

  • Cisco Network Engineer
    Forrest Solutions New York, NYJob description: ...support Multi-cast feeds. Required skills:- Cisco- Multi-castMajor pluses: - Certification: CCIE (Cisco Certified Internetwork Expert) - FIX connectivity Contact:Bruce Ormondbormond@forrestsolutions.com
  • Network Engineer
    SARANSH, Inc. Middletown, NJ
  • Network Engineer
    Subex Technologies Inc. Middletown, NJJob description: ...including skillful interaction under difficult situations. Required Certifications: Certification One: CCNA Certification Two: CCIE Skills Inventory Skill Experience Need 1) Extensive knowledge of FR, ATM, IP, MPLS...
  • Network Engineer
    Goahead Solutions New York, NYJob description: ...in Engineering, Computer Science or related technical degree.-Any of the following a plus: CCNP, CCDP, CCIP, CCDE, CCIE -ITILv3Type of Work and Required Skills: -Network Engineer with experience working with large complex...

• Meta

  • Log in
  • Entries RSS
  • Comments RSS
  • WordPress.com

•  

  July 2009

  M	T	W	T	F	S	S
  « Jun				Aug »
  		1	2	3	4	5
  6	7	8	9	10	11	12
  13	14	15	16	17	18	19
  20	21	22	23	24	25	26
  27	28	29	30	31

• Archives

  • March 2010
  • February 2010
  • January 2010
  • December 2009
  • November 2009
  • October 2009
  • September 2009
  • August 2009
  • July 2009
  • June 2009
  • May 2009
  • April 2009
  • March 2009
  • February 2009
  • January 2009
  • December 2008
  • November 2008
  • October 2008

• Recent Posts

  • Cisco Catalyst 6509 Switch = End-of-sale and end-of-life
  • Undocumented OSPF command SHOW IP OSPF EVENTS
  • Cisco End-to-End IPTV Solution with Define-Preserve-Realize Domains
  • WAN Throughput Calculator
  • NONAG presentation archive’s !!!

• Subscribe

  • Entries (RSS)
  • Comments (RSS)

• Blogroll

  • NetLink IT Inc – my company

• CCIE lab sudy links

  • ardenpackeer.com
  • bitbucketblog.com/
  • CCIE Candidate
  • CCIE Pilot
  • Cisco blog
  • Cisco Design Guides
  • Cisco Subnet
  • Communication Technologies Tips and Tricks (CT3)
  • http://www.protocols.com/
  • IOS tips and tricks
  • IP Routing Design Guides
  • IP Routing Design TechNotes
  • Lab tips
  • Narbik's bootcamp
  • Packet Life
  • Routing-Bits
  • The Cisco learning network
  • Various Site-to-Site IPSec VPN: Cisco, Juniper, Checkpoint, Sonicwall, Zywall

• Tools

  • Bit Calculator
  • http://mon.itor.us/
  • just-ping.com
  • OSPF Bandwidth Calculator
  • subnet calculator

• CCIE jobs – US

  • Network / Wireless Systems Engineer
    Chaash Washington, DCJob description: 7+ years-related experience. Typically requires BS/BA (EE/CS) or equivalent. CCIE or similar certification highly preferred.- Target subject skills include: WiMax, WiFi, 3G, 4G, Capacity Planning, Backhaul, Internet, Fiber...
  • Cisco Network Engineer
    TEKsystems Dearborn, MIJob description: ...interpersonal and communications skills.Skills Preferred:Cisco Certifications are highly desirable (CCNA, CCNP, CCDA, CCDP or CCIE).Firewalls Linux/Unix Cisco Works Alcatel-Lucent QIP, DNS/DHCPExperience Required:Yes...
  • Sr Network Engineer
    Netflix Los Gatos, CAJob description: ...based networking experience BA/BS or higher in computer science or a related field or equivalent experience CCIE, CCNP, or JCNIE certification highly desirable Other: Must be currently authorized to work in the US....
  • CCIE Sr. Network Engineer
    TEKsystems Greensboro-high Point-winsto, NCJob description: ...CCIEOur client is currently seeking a candidate with a CCIE certification aswell as experience in designing...
  • LAN Engineer
    Sentinel Technologies Downers Grove, ILJob description: ...*Must have 5 years hands-on experience with routers, switches, firewalls, wireless and various other LAN hardware.*CCIE, CCNP, CCDP, Security certification, Checkpoint certification or other related certification a plus.*Must have current or MCSE certification....

• Packet Life

  • RFC 5798 Brings IPv6 to VRRP
    RFC 5798 was published this week, formalizing the latest incarnation of Virtual Router Redundancy Protocol (VRRP). VRRPv3 introduces support for IPv6 in addition to IPv4. One might wonder why VRRP is necessary for IPv6 at all, given that IPv6 includes robust router discovery as part of its Neighbor Discovery (ND) protocol. Section 1.3 of the RFC explains it […]
  • The Science of Network Troubleshooting
    A number of people have written asking me what happened to a paper I wrote back in 2008 entitled "The Science of Network Troubleshooting." Unfortunately, I neglected to republish the paper after revamping packetlife.net in late 2009, so here it is again as a blog article. Troubleshooting is not an art. Along with many other IT methodologies, it is […]
  • Navigating Cisco.com Documentation
    From what I've seen interacting with other engineers, it seems that most of us, when we need to research something relevant to Cisco networking, go straight to Google. This is typically the most expedient path toward an answer, but it isn't necessarily the most reliable or the most accurate. The problem is that Google or another search engine will […]
  • Cisco "Go" links reference in the wiki
    One of my (very) slow-paced background projects has been building a list of all the handy Cisco.com "go" links I come across. "Go" links are easily remembered shortcut links to various content throughout Cisco.com. For example, http://cisco.com/go/fn redirects to Cisco's feature navigator tool at http://tools.cisco.com/ITDIT/CFN/jsp/ […]
  • Teaching binary and other bases
    I've seen a lot of people struggle when first learning decimal-to-binary and other conversions, mostly because they find themselves overwhelmed with conversion charts and don't quite grasp the concept of a numbering base. I decided to write this post when I realized the method I use to teach people binary and hexadecimal isn't used in any of t […]
  • OSPFv2 versus OSPFv3
    OSPFv3 is to IPv6 what OSPFv2 is to IPv4. The two versions of OSPF naturally have much in common, however there are several important differences in the way the two protocols operate. This article seeks to highlight some of the more noteworthy deviations. (For a more thorough discussion, see section 2 of RFC 5340.) For illustration, both OSPFv2 and OSPFv3 ha […]
  • IGP posters on sale for $9.99 this week
    Quick announcement today: the 36x24" interior routing protocol posters are on sale this week for $9.99 plus shipping. They make great lab decor!
  • Experimenting with VLAN hopping
    Most network engineers have been told at one point or another never to use VLAN 1 for user access. The motivation behind this warning is the result of fear concerning VLAN hopping attacks, wherein an attacker can send packets with a specially-crafted 802.1Q header(s) to "hop" from one VLAN to another. This theory relies on the assumption that a swi […]
  • SOHO configuration management
    In large enterprise and service provider environments, it is considered best practice to routinely back-up and archive the configurations of all network devices. These backups can be used in an emergency to restore a device's configuration which was inadvertently altered or erased. Such a scheme is typically accomplished via automated FTP or SCP transfe […]
  • Network Address Translation (NAT) cheat sheet
    Announcing cheat sheet #25: Network Address Translation (NAT). I realize it's been a while since I came out with the prior cheat sheet (though in fairness I did produce a pretty slick poster more recently). I promise I'll try not to wait so long before the next one.

Archive for July 28th, 2009