CCIE Plaque has finally arrived!
After passing the CCIE Lab Exam in Routing & Switching v5 on August 27th 2015 my CCIE Plaque has finally arrived. After all the late nights and weekends of studying and the cost of the training, bootcamps, travel and the lab exam fee, what do you get for passing? Well apart from your digits which […]
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Optimizing Traffic Engineering with NorthStar Controller on Software Gone Wild
Content providers were using centralized traffic flow optimization together with MPLS TE for at least 15 years (some of them immediately after Cisco launched the early MPLS-TE implementation in their 12.0(5)T release), but it was always hard to push the results into the network devices.
PCEP and BGP-LS all changed that – they give you a standard mechanism to extract network topology and install end-to-end paths across the network, as Julian Lucek of Juniper Networks explained in Episode 43 of Software Gone Wild.
Read more ...Wi-Fi’s Whipping Boy Complex
If you’ve ever attended a large conference or exhibition, chances are everyone whined about the Wi-Fi. But the truth is, a lot of the time, it’s not Wi-Fi’s fault at all. While there is a litany of Wi-Fi-specific deployment options...Despite Loss, Extreme Networks Says It’s Turned the Corner
Bright days ahead, CEO Ed Meyercord says.
The Path for Cloudpath = Multi-Vendor Wi-Fi Security
Author: Greg Beach, Ruckus VP, Product Management Looks like we created a Ruckus last week with our Cloudpath acquisition. Many customers and partners jumped on board to praise the deal, which we believe will simplify Wi-Fi onboarding and security for...Creative foot-shooting with Go RWMutex
Hi, I'm Filippo and today I managed to surprise myself! (And not in a good way.)
I'm developing a new module ("filter" as we call them) for RRDNS, CloudFlare's Go DNS server. It's a rewrite of the authoritative module, the one that adds the IP addresses to DNS answers.
It has a table of CloudFlare IPs that looks like this:
type IPMap struct {
sync.RWMutex
M map[string][]net.IP
}
It's a global filter attribute:
type V2Filter struct {
name string
IPTable *IPMap
// [...]
}
CC-BY-NC-ND image by Martin SoulStealer
The table changes often, so a background goroutine periodically reloads it from our distributed key-value store, acquires the lock (f.IPTable.Lock()), updates it and releases the lock (f.IPTable.Unlock()). This happens every 5 minutes.
Everything worked in tests, including multiple and concurrent requests.
Today we deployed to an off-production test machine and everything worked. For a few minutes. Then RRDNS stopped answering queries for the beta domains served by the new code.
What. That worked on my laptop™.
Here's the IPTable consumer function. You can probably spot the bug.
func (f *V2Filter) getCFAddr(...) (result []dns.RR) {
f. Continue readingCentina Systems Takes Aim at Operationalizing NFV & SDN
Texas company joins the fray in providing service assurance in virtual environments.
Worth Reading: Cloud Access Security Brokers
The post Worth Reading: Cloud Access Security Brokers appeared first on 'net work.
PQ Show 62: Open Networking At Dell
We sit down with Tom Burns of Dell to get an update on Dell's open networking efforts, including support for additional switch OSs. We also discuss the risks the company took in embracing the concept, and the implications of HP's recent open-source switch OS release.
The post PQ Show 62: Open Networking At Dell appeared first on Packet Pushers.
Featured NetCracker Blog Post: Want to Prove the NFV Business Case? Look to the BSS
"Traditional BSS will not be able to handle the shift from the physical network to the virtual network."
