Networking Archives - Page 3245 of 3443

HSRP AWARE PIM

In environments that require redundancy towards clients, HSRP will normally be running. HSRP is a proven protocol and it works but how do we handle when we have clients that need multicast? What triggers multicast to converge when the Active Router (AR) goes down? The following topology is used:

One thing to notice here is that R3 is the PIM DR even though R2 is the HSRP AR. The network has been setup with OSPF, PIM and R1 is the RP. Both R2 and R3 will receive IGMP reports but only R3 will send PIM Join, due to it being the PIM DR. R3 builds the (*,G) towards the RP:

R3#sh ip mroute 239.0.0.1
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
       L - Local, P - Pruned, R - RP-bit set, F - Register flag,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry, E - Extranet,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report, 
       Z - Multicast Tunnel, z - MDT-data group sender, 
        Continue reading

U.S. carriers meet voluntary deadline for unlocking mobile phones

Unlocking a mobile phone from a single U.S. carrier has caused consumers headaches in recent years, but seven major carriers on Wednesday met a voluntary, industry-created deadline to set conditions for unlocking to occur.Software locks on smartphones and other mobile phones prohibit users from using a device on another operator’s network, which makes it hard for someone to take a device loaded with apps to another carrier or to use the device when traveling abroad.Even though carriers have adhered to ways for consumers to get phones unlocked, the CTIA wireless industry group said that an unlocked phone isn’t necessarily an interoperable phone, since different carriers use different technologies and wireless spectrum bands.To read this article in full or to leave a comment, please click here

Why Microsoft’s HoloLens is the next big enterprise thing

If you had followed along on Twitter or gone straight to the source and listened to the live streaming version of the big Microsoft Windows 10 event on Jan. 21, you probably felt the excitement. That energy was not just about Windows 10: Yeah, that operating system seems nice, and the fit and finish will probably make it the next Windows 7 — you know, the version of the product that corporations land on and run for a decade or more because it is just solid, reliable, and compatible. Everyone who skipped Windows 8 and Windows 8.1 will certainly gravitate toward a major migration toward Windows 10, and Microsoft understands this. It looks like a solid release.To read this article in full or to leave a comment, please click here

Panasonic’s Toughbook 54 gets lighter, but stays strong

Panasonic’s Toughbooks are known for their strength and durability, but the company is trying to resolve some of the heft and size issues with its latest model.The Toughbook 54 14-inch laptop is just 1.9 kilograms (4.19 pounds), much lighter than its predecessor, the Toughbook 53, which was over 2.5 kilograms. Panasonic has also doubled memory capacity of the laptop to 16GB, and included a spare bay to improve storage capacity.The Toughbook isn’t going to compete on weight with laptops marketed as being super light, such as Dell’s XPS 13, which weights a bit more than 1 kilogram. But it is much tougher, thanks to a magnesium alloy chassis that can withstand drops of just under 1 meter. The Toughbook 54 has a handle, making it look much like a mini-suitcase.To read this article in full or to leave a comment, please click here

The Upload: Your tech news briefing for Friday, February 13

Obama visits Silicon Valley to headline cybersecurity summitThe White House is heading west to Silicon Valley on Friday looking for ideas on how to improve the nation’s cybersecurity. At the first-of-its-kind summit at Stanford University, U.S. President Barack Obama is expected to sign an executive order that urges companies to share threat information with one another and with the government. There are some areas of discord between the government and the tech industry: surveillance and encryption. Apple CEO Tim Cook is the most high-profile executive in attendance, while top execs from Google, Facebook and Yahoo declined invitations to attend (but will be represented in discussions at the event).To read this article in full or to leave a comment, please click here

The Upload: Your tech news briefing for Friday, February 13

DMVPN Dynamic Multipoint VPN

DMVPN is dynamic, scalable and easy to configure Cisco specific VPN solution. DMVPN uses two major technologies for its operation : NHRP Next Hop Resolution Protocol mGRE Multipoint GRE In this post I will explain all the basics of DMVPN. For detailed routing protocol design over DMVPN will be covered in different post which will… Read More »

The post DMVPN Dynamic Multipoint VPN appeared first on Network Design and Architecture.

Asus seeks to expand smartphone presence in Europe, China and US

Asustek Computer isn’t exactly known for smartphones, but the Taiwanese PC maker is aiming to bring more Android phones to U.S. and European markets this year.A year ago, Asus introduced its ZenFone line, a range of Android handsets, and demand for the phones is growing.In the fourth quarter, Asus shipped 4.5 million smartphones, up from a mere 200,000 units in the first quarter of 2014.The shipments are still small compared to those of leading vendors such as Apple and Samsung Electronics, but Asus is among the PC makers hoping to break out from the notebook market by releasing more mobile devices. In 2017, Asus expects revenue from its mobile business to surpass that of its PCs.To read this article in full or to leave a comment, please click here

Musing: Who Cares About FCoE in 2015 ?

While I continue to scratch my head about who is foolish enough to actually deploy FCoE, perhaps a more important question is which vendors care about it ?

The post Musing: Who Cares About FCoE in 2015 ? appeared first on EtherealMind.

Birth of the virtual mainframe?

For this week’s blog, I wanted to share some perspective on technology transformation, over a time span of 20+ years – this

Jeb Bush’s email cache held another surprise: Viruses

In addition to personal phone numbers and email addresses for hundreds of people who corresponded with him, there’s something else inside the cache of emails that Jeb Bush released this week: computer viruses.Earlier this week, Bush, who some tip as a presidential hopeful, released thousands of emails from his time as governor of Florida, when he promoted his “[email protected]” email address as a way for voters to interact with him. The emails were released unredacted—a deliberate move intended to demonstrate transparency but one that backfired because the messages included the names, email addresses and phone numbers of thousands of people.Alongside a Web interface to read the emails, Bush also offered raw Microsoft Outlook files, and it’s in those files where the viruses lurked in file attachments.To read this article in full or to leave a comment, please click here

US lawmakers introduce two bills to protect email privacy

A long-standing effort to extend privacy protections to email and other data in the cloud got new life Thursday when U.S. lawmakers introduced not one, but two bills to reform the country’s electronic privacy laws.Both the Law Enforcement Access to Data Stored Abroad Act, called the LEADS Act, and the Electronic Communications Privacy Amendments Act would require law enforcement agencies to get court-ordered warrants to search data that’s been stored on Web-based or cloud-based services for more than 180 days.Under the 29-year-old Electronic Communications Privacy Act [ECPA], law enforcement agencies do not need a court-ordered warrant to search unopened email stored with a vendor for longer than 180 days, although they do need court approval to access unopened email less than 180 days old.To read this article in full or to leave a comment, please click here

GeoPoll, Control Union tap mobile tech to bring African farmers into supply chain

U.S.-based GeoPoll is partnering with Control Union, an international provider of agricultural inspection and safety services, to reach out to African farmers and bring them into global supply chain networks while ensuring compliance with standard business practices.GeoPoll provides technology for data collection, using mobile platforms for surveys. Control Union will be able to use GeoPoll technology to reach small-holding farmers to gain more information about their practices. The idea is to bring increased transparency to food supply chains globally, with a focus on key products such as cocoa, coffee, cotton, fruits and vegetables, palm oil, rice, and tobacco. To read this article in full or to leave a comment, please click here

GeoPoll, Control Union tap mobile tech to bring African farmers into supply chain

Microsoft releases Windows 10 technical preview for phones: What (some of you) will get

Microsoft opened its Windows 10 Technical Preview for Phones on Thursday by supporting just midrange to lower-end devices, disappointing some early adopters who were hoping to try out Microsoft’s new preview.Currently, just six phones can download the Windows 10 Technical Preview: the Lumia 630, 635, 636, 638, 730, and Lumia 830. Aside from the Lumia 830, Microsoft’s “affordable flagship,” the remainder are midrange Windows Phones that were released according to Microsoft’s principle of driving Windows Phone market share by expanding its user base.10 mobile startups to watch “We are starting with a limited set of devices supported for this first preview,” Gabe Aul, the engineering general manager at Microsoft who has been the point man for Windows 10, said in a blog post. “Windows 10 will drive innovation across screens of all sizes and we will have new hardware from Microsoft and our partners, including new flagship phones.”To read this article in full or to leave a comment, please click here

Cyberattacks in West Africa spark debate over online security

A wave of cyberattacks aimed at government-related websites in Nigeria, Ghana and Senegal over the last two months has triggered a debate over how to bolster online security and deal with politically motivated hacking.A popular Senegalese news site, Seneweb and the website of the government’s ICT management agency, L’Agence De l’Informatique de l’Etat (ADIE), were the first to be hacked in the latest round of attacks, in December and January, respectively (though the Seneweb hack was not disclosed until January).The attacks were reportedly launched in response to Senegalese President Macky Sall’s participation in a rally in support of the French magazine, Charlie Hebdo. Twelve people were killed on Jan. 7 by two heavily armed men at the Paris office of satirical news weekly Charlie Hebdo. The attack was reportedly prompted by satirical material involving Muslim themes and historical figures.To read this article in full or to leave a comment, please click here

Google fear a factor behind Orbitz-Expedia deal

After acquiring a competitor weeks ago and just announcing plans to buy another one, Expedia may look like the dominant player in online travel, but its CEO argues the deals are necessary to battle another rival: Google.Expedia offers online booking services for flights, car rentals and hotels under brands such as Hotels.com and Hotwire.com, and plans to beef up its business with Thursday’s US$1.6 billion proposed acquisition of rival Orbitz, which offers similar services and operates sites such as CheapTickets.com.Snatching up Orbitz will give Expedia the customers it needs to fend off companies that have muscled their way into the online travel agency space, including Google, said Expedia CEO Dara Khosrowshahi during a webcast held to discuss the Orbitz deal. Google, along with traditional travel industry players like hotels, are all trying to establish themselves as the best option for consumers looking to book travel.To read this article in full or to leave a comment, please click here

Google fear a factor behind Orbitz-Expedia deal

Experimenting with the CSR1000v REST API

This all started because we occasionally want to block traffic from an IP address or two for a short time. Our firewall is a pain to configure for this sort of thing: adding a drop for a single IP address literally takes 10 minutes. You have to open a fat client, create an object, add the object to a group, save the config, verify the config, push the config, etc.

I thought that SRTBH (Source-based Real-Time Black Hole) implemented by BGP would be the ticket: fast, easy, and theoretically easy to automate with the REST API in the Cisco Cloud Services Router 1000v. SRTBH is a simple and elegant way of dropping selected traffic on BGP speaking routers. In a nutshell:

You configure a "trigger router" that speaks iBGP with the rest of your BGP-speaking routers (usually your Internet edge or transit routers), but doesn't participate in traffic forwarding.
On each edge/transit router you configure a static route to null0 for an unused /32, usually 192.0.2.1: ip route 192.0.2.1 255.255.255.255 null0
On each edge/transit router you configure loose-mode unicast RPF filtering on your outside interfaces: ip verify source reachable-via any. Continue reading

Experimenting with the CSR1000v REST API

You configure a "trigger router" that speaks iBGP with the rest of your BGP-speaking routers (usually your Internet edge or transit routers), but doesn't participate in traffic forwarding.
On each edge/transit router you configure a static route to null0 for an unused /32, usually 192.0.2.1: ip route 192.0.2.1 255.255.255.255 null0
On each edge/transit router you configure loose-mode unicast RPF filtering on your outside interfaces: ip verify source reachable-via any. Continue reading

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