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	<title>Network Broadcast</title>
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	<link>http://networkbroadcast.co.uk</link>
	<description>The moans and groans of CCIE #38338</description>
	<lastBuildDate>Fri, 26 Apr 2013 08:19:22 +0000</lastBuildDate>
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		<title>SP Study Material &#8211; Routing Bits</title>
		<link>http://networkbroadcast.co.uk/2013/04/sp-study-material-routing-bits/</link>
		<comments>http://networkbroadcast.co.uk/2013/04/sp-study-material-routing-bits/#comments</comments>
		<pubDate>Fri, 26 Apr 2013 08:19:22 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[CCIE]]></category>
		<category><![CDATA[CCIE SP]]></category>
		<category><![CDATA[Exam]]></category>
		<category><![CDATA[General]]></category>
		<category><![CDATA[Off-Topic]]></category>
		<category><![CDATA[Snippet]]></category>
		<category><![CDATA[Studying]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=570</guid>
		<description><![CDATA[So most if not all RS candidates have at least heard if not used Ruhann&#8217;s routing bits handbook. I used it whilst studying during R&#38;S and am so happy that Ruhann has released a companion version for the SP track. Up until now he has hinted at its release but nothing has come out until today, if you head over to his blog here you can download a free sample of the upcoming SP handbook for free. Although it is geared towards candidates that are going for their CCIE I...]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Cisco Nexus 7K &#8211; Secret decoder ring</title>
		<link>http://networkbroadcast.co.uk/2013/04/cisco-nexus-7k-secret-decoder-ring/</link>
		<comments>http://networkbroadcast.co.uk/2013/04/cisco-nexus-7k-secret-decoder-ring/#comments</comments>
		<pubDate>Wed, 17 Apr 2013 21:59:27 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[Data Centre]]></category>
		<category><![CDATA[General]]></category>
		<category><![CDATA[Off-Topic]]></category>
		<category><![CDATA[Snippet]]></category>
		<category><![CDATA[Tips]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=566</guid>
		<description><![CDATA[Back when I first starting using the 7K&#8217;s I thought the naming of the line cards followed the same logical naming scheme of all other Cisco equipment (by that I mean there is no logic to it at all!). It was when I was watching one of this years Cisco Live presentations on the 7K architecture that it all became a lot clearer. So without further ado here is how to use the magical Nexus 7K linecard decoder ring: N7K-M224XP-23L N7K - Signifies that the card is for a Nexus...]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>CCIE Update and plaque</title>
		<link>http://networkbroadcast.co.uk/2013/04/ccie-update-and-plaque/</link>
		<comments>http://networkbroadcast.co.uk/2013/04/ccie-update-and-plaque/#comments</comments>
		<pubDate>Sun, 14 Apr 2013 14:41:07 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[CCIE]]></category>
		<category><![CDATA[Off-Topic]]></category>
		<category><![CDATA[Snippet]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=562</guid>
		<description><![CDATA[So this week my CCIE package arrived along with this little beauty. I had no idea these things weighed so much, mind you I suppose for $1500 its what you should expect I&#8217;m currently on with studying for the SP, all good so far as a lot of it is very familiar due to my day job but there are still a fair few new things to learn before I make an attempt. Perhaps try and make a lab attempt by the end of the year? I guess we will...]]></description>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Service Provider &#8211; Half-Duplex VPN&#8217;s</title>
		<link>http://networkbroadcast.co.uk/2013/04/service-provider-half-duplex-vpns/</link>
		<comments>http://networkbroadcast.co.uk/2013/04/service-provider-half-duplex-vpns/#comments</comments>
		<pubDate>Sun, 07 Apr 2013 21:35:31 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[CCIE]]></category>
		<category><![CDATA[CCIE SP]]></category>
		<category><![CDATA[Service Provider]]></category>
		<category><![CDATA[Topics]]></category>
		<category><![CDATA[Cisco]]></category>
		<category><![CDATA[MPLS]]></category>
		<category><![CDATA[SP]]></category>
		<category><![CDATA[Tips]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=552</guid>
		<description><![CDATA[The other day whilst reading up on some SP topics I came across a rarely used function available on some higher end Cisco models called half duplex VRF's (or HD VRF's in some places).

I know it is quite a common thing to see in service provider topologies where you have a radius / virtual-template driven platform such as a DSL LNS etc but up until now I wasn't aware that it can also be used on other platforms on regular (non virtual) interfaces.

For the demo topology I am going to use a faily simple network of three 7200's in GNS3. According to the Cisco documentation <a href="http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_vpn_half_dup_vrf.html">here</a> this feature has been around since 12.4(20)T or 12.2(33)SRC for the SR train.

In the topolgy I am using R1 and R2 to emulate customer sites which will be a member of the same VRF on R3 which will play the role of our PE.]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Cisco kills of first gen ASA&#8217;s</title>
		<link>http://networkbroadcast.co.uk/2013/03/cisco-kills-of-first-gen-asas/</link>
		<comments>http://networkbroadcast.co.uk/2013/03/cisco-kills-of-first-gen-asas/#comments</comments>
		<pubDate>Tue, 19 Mar 2013 21:21:52 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[Firewalls]]></category>
		<category><![CDATA[General]]></category>
		<category><![CDATA[Off-Topic]]></category>
		<category><![CDATA[Security]]></category>
		<category><![CDATA[Snippet]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=545</guid>
		<description><![CDATA[So yesterday Cisco announced that it has EoL'd some (most) of the first generation ASA series of firewall.

It's not really a surprise given that last year they released what I will call the second generation of ASA's and pretty much all aspects they wiped the floor with the first generation.]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Cisco RIB operations &#8211; AD comparisons</title>
		<link>http://networkbroadcast.co.uk/2013/03/cisco-rib-operations-ad-comparisons/</link>
		<comments>http://networkbroadcast.co.uk/2013/03/cisco-rib-operations-ad-comparisons/#comments</comments>
		<pubDate>Sun, 17 Mar 2013 18:23:34 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[CCIE]]></category>
		<category><![CDATA[CCNP]]></category>
		<category><![CDATA[General]]></category>
		<category><![CDATA[Off-Topic]]></category>
		<category><![CDATA[Route]]></category>
		<category><![CDATA[Tips]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=497</guid>
		<description><![CDATA[A post over at the IEOC forums got me thinking to something I picked up a long time ago but I can't really remember where...

When a prefix arrives at a device from two different sources the AD is compared and the lower AD wins out, simple CCNA level stuff right? Well what if the AD is the same due to AD manipulation?]]></description>
		<wfw:commentRss>http://networkbroadcast.co.uk/2013/03/cisco-rib-operations-ad-comparisons/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>DHCP and conflict logging</title>
		<link>http://networkbroadcast.co.uk/2013/03/dhcp-and-conflict-logging/</link>
		<comments>http://networkbroadcast.co.uk/2013/03/dhcp-and-conflict-logging/#comments</comments>
		<pubDate>Tue, 05 Mar 2013 23:53:07 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[General]]></category>
		<category><![CDATA[Off-Topic]]></category>
		<category><![CDATA[Snippet]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=489</guid>
		<description><![CDATA[DHCP is something that is kind of overlooked sometimes and is treat as a given. There was a recent DHCP issue at a customer site and I wanted to clarify my thoughts on what happened behind the scenes but I can&#8217;t say I have ever actually checked and proved that the conflict process works in the way I expected. When a fresh DHCP client first goes live on the network it carries out a pretty standard &#8216;handshake&#8217; of: DHCPDISCOVER &#8211; This is broadcasted on the local LAN with a request...]]></description>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Time to put my SP hat on</title>
		<link>http://networkbroadcast.co.uk/2013/03/time-to-put-my-sp-hat-on/</link>
		<comments>http://networkbroadcast.co.uk/2013/03/time-to-put-my-sp-hat-on/#comments</comments>
		<pubDate>Mon, 04 Mar 2013 21:24:18 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[CCIE]]></category>
		<category><![CDATA[CCIE SP]]></category>
		<category><![CDATA[Exam]]></category>
		<category><![CDATA[Studying]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=487</guid>
		<description><![CDATA[Well I&#8217;ve decided to take on the CCIE SP next. Given that there is a lot of overlap between the two tracks and that I use a lot of the technology (multicast aside) in my day job it should be quite good. I&#8217;ve started as I did with the R&#38;S by going through the INE ATC videos and have been going over IS-IS tonight, it&#8217;s something that is new to me as by the time I did the CCNP it had been removed so its my first time on the...]]></description>
		<wfw:commentRss>http://networkbroadcast.co.uk/2013/03/time-to-put-my-sp-hat-on/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Whats next?</title>
		<link>http://networkbroadcast.co.uk/2013/03/whats-next/</link>
		<comments>http://networkbroadcast.co.uk/2013/03/whats-next/#comments</comments>
		<pubDate>Sat, 02 Mar 2013 16:01:22 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[CCIE]]></category>
		<category><![CDATA[Exam]]></category>
		<category><![CDATA[General]]></category>
		<category><![CDATA[Studying]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=477</guid>
		<description><![CDATA[Well since passing my CCIE R&#38;S I've been sat at the crossroads of where to go to next.

I have multiple things that I'm interested in doing:

<ul>
<li>CCIE SP</li>
<li>CCIE DC</li>
<li>CCDA / CCDP</li>
</ul>

I think I'm going to go for the SP track next, it makes the most sense in what I do day-to-day but at the same time some of the new DC technologies are pretty interesting.]]></description>
		<wfw:commentRss>http://networkbroadcast.co.uk/2013/03/whats-next/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Who said re-reads are useless?</title>
		<link>http://networkbroadcast.co.uk/2013/02/who-said-re-reads-are-useless/</link>
		<comments>http://networkbroadcast.co.uk/2013/02/who-said-re-reads-are-useless/#comments</comments>
		<pubDate>Tue, 26 Feb 2013 11:12:37 +0000</pubDate>
		<dc:creator>David Rothera</dc:creator>
				<category><![CDATA[CCIE]]></category>
		<category><![CDATA[Exam]]></category>
		<category><![CDATA[General]]></category>
		<category><![CDATA[Rant]]></category>
		<category><![CDATA[Studying]]></category>
		<category><![CDATA[38338]]></category>
		<category><![CDATA[PASS]]></category>
		<category><![CDATA[re-read]]></category>

		<guid isPermaLink="false">http://networkbroadcast.co.uk/?p=457</guid>
		<description><![CDATA[As a follow up to my last post here on my CCIE lab failure&#8230; or so I thought. Those of you who have read through the post will remember that I couldn&#8217;t really see where I had gone wrong, if you would have put me in the same exam again I would end up doing the exact same thing again and this kind of bummed me out and made me doubt myself! When I got my score report and saw that I scored a 43% on Layer2 I thought something...]]></description>
		<wfw:commentRss>http://networkbroadcast.co.uk/2013/02/who-said-re-reads-are-useless/feed/</wfw:commentRss>
		<slash:comments>14</slash:comments>
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