Pete’s Packet

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

SARANSH, Inc. Middletown, NJ

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...

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...

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...

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...

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....

TEKsystems Greensboro-high Point-winsto, NCJob description: ...CCIEOur client is currently seeking a candidate with a CCIE certification aswell as experience in designing...

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....

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 […]

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 […]

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 […]

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/ […]

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 […]

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 […]

Quick announcement today: the 36x24" interior routing protocol posters are on sale this week for $9.99 plus shipping. They make great lab decor!

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 […]

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 […]

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.