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Author: Masood Ahmad Shah (Charles Sturt University)ObjectiveSDN1 Controllers are the brain and decision maker in the SDN-based network infrastructure. A controller consist of a set of application components to act as an essential control point in the network infrastructure and make decisions to programs the forwarding behavior for the packets ...
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Suppose, you have multiple following circuits that need to be removed from the configurations, and then have them disabled and marked as an [AVAILABLE]:et-1/0/0 to et-1/0/10et-1/0/13et-1/0/21With traditional approach the configlet would be pretty lengthy, however with wildcard command it's pretty damn ...
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Very, very cool Internet visualization application for Android and Iphones, they are using data from the folks at CAIDA.
http://money.cnn.com/2013/03/06/technology/innovation/map-of-the-internet/
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When buying or upgrading a Juniper device, there are always questions that come to mind (Is “this” feature supported on “that” platform, and if so “which” version did it come out?)As of July 1st, Juniper have released the Pathfinder tool: http://pathfinder.juniper.netThis tool is comprised of two features - Feature Explorer and Content ...
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Earned my JNCIP-SP certification on May 20, 2011 (A completely new certification by Juniper Networks ).
I hope to finish JNCIE-SP within next 3-4 week. Wish me all the luck :)
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<meta charset="utf-8">Earned my JNCIP-SP certification today
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Here's just a quick and handy tip for anyone who is after how to calculate CAR rate-limit.
normal burst = configured rate * (1 byte)/(8 bits) * 1.5 seconds
extended burst = 2 * normal burst
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At ICANN IPv6 News Conference, they officially announced, no more IPv4 left. http://youtu.be/gveJs6YRYXU
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Just in case if you want to simulate a fiber cut, you can enter a command from the FPC shell that cuts the power to the laser of an interfacestart shell pfe network fpcXtest xfp <index> laser offYou can find the XFP index by doing ''show xfp list'' from the shell prompt. I haven't seen a method that works for SFP interfaces.For sonet ...
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If you are familiar with Cisco switches, and using Cisco switches fairly well, this post will help you to boost your confidence as a Juniper network engineer.
If you can configure a Cisco switch, then you also can configure a JUNOS based switch :) here you go..
IOS#vlan-database(vlan)#vlan 5 name Internet(vlan)#vlan 6 ...
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A firewall filters provide rules that define whether to permit or deny packets that are transiting an interface on a switch or router from a source address to a destination address. They can be applied to ports, VLANs, or layer 3 interfaces. The following firewall filter types are supported for EX-series switches:Port (Layer 2) firewall ...
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You may have used traceroute in a Micrsoft OS or in Unix. It’s quite simple and can tell you a few things about the connection between you and any other device on the internet. So what if the problem were intermittent, or traceroute did not show any problems because perhaps the choke point is experiencing intermittent bursts of data? ...
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Would you like to see JUNOS defaults configuration. To view certain JUNOS default settings for dynamic profiles/system/services/applications, you must type the full command:
jahil@voyager# show configuration groups junos-defaults
Note: TAB/SPACE autocomplete does not work here :)
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Cisco released IOS 15.0. This is the next major release after 12.4. It’s been over 4 years since Cisco has delivered a major release of IOS code. The new features listed in the documentation include:
•BGP Event Based VPN Import;•BGP Per Neighbor Graceful Restart Configuration;•BGP RT Changes Without PE-CE Neighbor Impact;•BGP local ...
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The JUNOS command completion feature saves you lots of time and energy, and it provides syntax checking as you type. Gone are the days when you type a command on a line and after you press Enter the command is either invalid or not supported on that version of software. Any error or ambiguity will be detected early, and the router/switch will ...
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Remember Juniper's JUNOS is heavily influenced by Unix, afterall it does sit on top of FreeBSD. You can use EMACS commands for cursor movement, which include:
Ctrl-a Moves the cursor to the beginning of the command line, back to the promptCtrl-e Moves the cursor to the end of the command lineCtrl-b Moves the cursor back one characterCtrl-k ...
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Aggregated ethernet interface increases bandwidth, provides graceful degradation as failure occurs, and of course increases availability.
To configure an aggregated ethernet interface on Juniper's boxes, you can use the link aggregation feature to aggregate one or more links to form a virtual link.The client will treat this virtual link as if it ...
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On Juniper Router's if you want to sample all traffic, you don't really need a firewall filter, you can use the following simple form:
ge-0/0/0 { unit 0 { family inet ...
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Great interview with Randy Bush. Very interesting thoughts about costs experienced when hitting the IPv4 wall
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
Normal
0
false
false
false
EN-US
X-NONE
...
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Which Cisco IOS software version should I be using? Well no can answer this straight away. But Cisco offers the most software tools for its IOS routers so many of these
tools are only for them. Here are some of the best tools and research sites for
finding the code version you need on your Cisco security products.
IOS software Advisor Tool - ...
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Here I have some information on MTU Juniper, I had investigated it for a customer while ago. The actual frames transmitted also contain cyclic redundancy check (CRC) bits, which are not part of the media MTU. For example, the media MTU for a Gigabit Ethernet interface is specified as 1500 bytes, but the largest possible frame ...
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Aziz, Peter & Shadowman, Thanks
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Adding comments to configuration is always tricky with network devices. Annotate is just one of many cool features in JUNOS. The JUNOS CLI lets you leave comments about the configuration as a part of its listing. The comments can be quite handy when you or other team members are trying to troubleshoot a problem or need to make configuration ...
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@Khurram Bh, Fanx.
@Shivlue, Fanx.
@Rider, Fanx.
@ShahGhizaal, Fanx.
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The advantage of having a scripting language on your router seems to come in
pretty handy sometimes (though I bet most people don’t really use the Tcl
interpreter on their Cisco’s). I have been using TCL scripts for ages. The new EEM is just heavenly, you can trigger on almost everything. Even add your own syslog messages or create menus for ...
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So I just got engaged on Friday.. very exciting. We are planning on having Winter 09/10 wedding, so it will be a 7|8 months engagement.
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JUNOS now support MPLS-in-GRE & MPLS-in-IP. You guys can now encapsulate the MPLS label stack for a packet with an IP header, making it possible to tunnel MPLS over networks that do not have MPLS enabled on their core routers. The JUNOS software supports both types of IP-based encapsulations: MPLS-in-IP and MPLS-in-GRE. JUNOS can both push the ...
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CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 85
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CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 85
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CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 85
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CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 85
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