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	<title>CCIE, the beginning!</title>
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		<title>CCIE, the beginning!</title>
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		<item>
		<title>DHCPv6 fake attack</title>
		<link>http://cciethebeginning.wordpress.com/2012/01/27/dhcpv6-fake-attack/</link>
		<comments>http://cciethebeginning.wordpress.com/2012/01/27/dhcpv6-fake-attack/#comments</comments>
		<pubDate>Fri, 27 Jan 2012 09:21:16 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[DHCPv6]]></category>
		<category><![CDATA[IPv6]]></category>
		<category><![CDATA[Security]]></category>
		<category><![CDATA[rapid-commit]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/?p=892</guid>
		<description><![CDATA[DHCPv6 relies on stateless UDP communication using UDP 546 and UDP 547 ports. As stated in the RFC 3315 this is makes DHCPv6 particularly vulnerable to fake attack in which SOLICIT messages are generated with random source prefixes. Particularly in rapid-commit where ONLY two messages are exchanged between the client and the server to get [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=892&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<item>
		<title>Stateful DHCPv6 Prefix delegation (Rapid-commit) [4/4]</title>
		<link>http://cciethebeginning.wordpress.com/2012/01/18/stateful-dhcpv6-prefix-delegation-rapid-commit-44/</link>
		<comments>http://cciethebeginning.wordpress.com/2012/01/18/stateful-dhcpv6-prefix-delegation-rapid-commit-44/#comments</comments>
		<pubDate>Wed, 18 Jan 2012 18:16:47 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[DHCPv6]]></category>
		<category><![CDATA[IPv6]]></category>
		<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[normal-commit]]></category>
		<category><![CDATA[rapid-commit]]></category>
		<category><![CDATA[relay]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/?p=877</guid>
		<description><![CDATA[Picture1: DHCPv6 prefix delegation topology R1 configuration [&#62; 12.4(24) T]: Prefix delegation gives the possibility to centrally control IPv6 addresses used in remote sites. Router R1 acts as the primary DHCPv6 server for the client router R2, which in turn acts as DHCP server for final clients. For example R1 can be a service provider [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=877&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://cciethebeginning.wordpress.com/2012/01/18/stateful-dhcpv6-prefix-delegation-rapid-commit-44/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
	
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		<title>Stateful DHCPv6 Relay (Rapid-commit) [3/4]</title>
		<link>http://cciethebeginning.wordpress.com/2012/01/18/stateful-dhcpv6-relay-rapid-commit-34/</link>
		<comments>http://cciethebeginning.wordpress.com/2012/01/18/stateful-dhcpv6-relay-rapid-commit-34/#comments</comments>
		<pubDate>Wed, 18 Jan 2012 18:10:38 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[DHCPv6]]></category>
		<category><![CDATA[IPv6]]></category>
		<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[normal-commit]]></category>
		<category><![CDATA[rapid-commit]]></category>
		<category><![CDATA[relay]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/?p=869</guid>
		<description><![CDATA[Picture1: DHCPv6 relay topology Server configuration [&#62; 12.4(24) T]: This configuration is useful in case your DHCP server is not in the same segment as DHCP clients. R1 is the DHCP server, R2 is the DHCPv6 relay agent and R3 is used as a DHCP client. R1: ipv6 dhcp pool pool0 address prefix 2001:DB8::/64 lifetime [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=869&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://cciethebeginning.wordpress.com/2012/01/18/stateful-dhcpv6-relay-rapid-commit-34/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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			<media:title type="html">cciethebeginning</media:title>
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		<item>
		<title>Stateless DHCPv6 + SLAAC [2/4]</title>
		<link>http://cciethebeginning.wordpress.com/2012/01/18/stateless-dhcpv6-slaac-24/</link>
		<comments>http://cciethebeginning.wordpress.com/2012/01/18/stateless-dhcpv6-slaac-24/#comments</comments>
		<pubDate>Wed, 18 Jan 2012 18:07:36 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[DHCPv6]]></category>
		<category><![CDATA[IPv6]]></category>
		<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[normal-commit]]></category>
		<category><![CDATA[rapid-commit]]></category>
		<category><![CDATA[relay]]></category>
		<category><![CDATA[SLAAC]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/?p=862</guid>
		<description><![CDATA[This is a common LAN Deployment model in which DHCPv6 is used to advertise DNS and domain name and IPv6 prefixes are assigned using classic SLAAC (Stateless Address Auto-Configuration). (Server configuration [&#62; 12.4(24) T]) ipv6 dhcp pool SLAAC-POOL dns-server XXXX:YYYY:8B6B:90E0::57 dns-server 2001:DB8::57 domain-name nouri.com ! interface FastEthernet0/1 ipv6 address 2001:DB8:23::2/64 ipv6 nd other-config-flag ipv6 dhcp [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=862&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://cciethebeginning.wordpress.com/2012/01/18/stateless-dhcpv6-slaac-24/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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			<media:title type="html">cciethebeginning</media:title>
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		<item>
		<title>IOS DHCPv6 deployment schemes</title>
		<link>http://cciethebeginning.wordpress.com/2012/01/18/ios-dhcpv6-deployment-schemes/</link>
		<comments>http://cciethebeginning.wordpress.com/2012/01/18/ios-dhcpv6-deployment-schemes/#comments</comments>
		<pubDate>Wed, 18 Jan 2012 17:55:07 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[DHCPv6]]></category>
		<category><![CDATA[IPv6]]></category>
		<category><![CDATA[normal-commit]]></category>
		<category><![CDATA[rapid-commit]]></category>
		<category><![CDATA[relay]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/?p=848</guid>
		<description><![CDATA[The following four posts are dedicated to DHCPv6 deployment. For the reasons I mentioned in the previous post, I used IOS version 12.4(24)T for all routers. Stateful DHCPv6: the client receives IPv6 prefix, DNS server and domain name through DHCP. Stateless DHCPv6 + SLAAC: the client receives IPv6 prefix through SLAAC, but gets the DNS [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=848&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://cciethebeginning.wordpress.com/2012/01/18/ios-dhcpv6-deployment-schemes/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">cciethebeginning</media:title>
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			<media:title type="html">dhcpv6-simple-normal-commit</media:title>
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		<item>
		<title>DHCPv6 address assignment</title>
		<link>http://cciethebeginning.wordpress.com/2012/01/07/dhcpv6-address-assignment/</link>
		<comments>http://cciethebeginning.wordpress.com/2012/01/07/dhcpv6-address-assignment/#comments</comments>
		<pubDate>Sat, 07 Jan 2012 13:13:18 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[DHCPv6]]></category>
		<category><![CDATA[IPv6]]></category>
		<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[IPv6 DHCPv6 IOS Debian-client]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/?p=838</guid>
		<description><![CDATA[The immense address space provided by IPv6 engenders some challenges related to the management and the distribution of these 128-bit hexadecimal addresses. SLAAC or Stateless Auto Configuration is a good solution for small networks or separated segments, but such address distribution could not be appropriate for big networks where address assignment requires more control and [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=838&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://cciethebeginning.wordpress.com/2012/01/07/dhcpv6-address-assignment/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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			<media:title type="html">cciethebeginning</media:title>
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	</item>
		<item>
		<title>Automatic 6to4 mechanism</title>
		<link>http://cciethebeginning.wordpress.com/2012/01/03/automatic-6to4-mechanism/</link>
		<comments>http://cciethebeginning.wordpress.com/2012/01/03/automatic-6to4-mechanism/#comments</comments>
		<pubDate>Tue, 03 Jan 2012 21:42:34 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[IPv6]]></category>
		<category><![CDATA[6to4]]></category>
		<category><![CDATA[IPv6m]]></category>
		<category><![CDATA[transition]]></category>
		<category><![CDATA[tunnel]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/?p=821</guid>
		<description><![CDATA[Here is a small animation explaining how automatic 6to4 works. For more details about the deployment please refer to this previous post. (Note: clear your browser cache to update the latest animation) Filed under: IPv6 Tagged: 6to4, IPv6m, transition, tunnel<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=821&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://cciethebeginning.wordpress.com/2012/01/03/automatic-6to4-mechanism/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">cciethebeginning</media:title>
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		<item>
		<title>IPv6 routing protocol redistribution</title>
		<link>http://cciethebeginning.wordpress.com/2011/12/22/ipv6-routing-protocol-redistribution/</link>
		<comments>http://cciethebeginning.wordpress.com/2011/12/22/ipv6-routing-protocol-redistribution/#comments</comments>
		<pubDate>Thu, 22 Dec 2011 16:14:35 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[IPv6]]></category>
		<category><![CDATA[Routing protocols]]></category>
		<category><![CDATA[troubleshooting]]></category>
		<category><![CDATA[EIGRP]]></category>
		<category><![CDATA[filtering]]></category>
		<category><![CDATA[OSPFv3]]></category>
		<category><![CDATA[redistribution]]></category>
		<category><![CDATA[summarization]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/?p=806</guid>
		<description><![CDATA[Though the transition period from IPv4 to IPv6 is going to last for a long time in which both protocols will coexist, we shouldn&#8217;t forget that the final goal of IPv6 is to completely replace IPv4. The best way to gain more experience with the new intricacies and challenges of IPv6 is to test IPv6-based [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=806&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://cciethebeginning.wordpress.com/2011/12/22/ipv6-routing-protocol-redistribution/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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			<media:title type="html">cciethebeginning</media:title>
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		<item>
		<title>Routing Protocol Redistribution and Path optimization</title>
		<link>http://cciethebeginning.wordpress.com/2011/10/17/routing-protocol-redistribution-and-path-optimization/</link>
		<comments>http://cciethebeginning.wordpress.com/2011/10/17/routing-protocol-redistribution-and-path-optimization/#comments</comments>
		<pubDate>Mon, 17 Oct 2011 13:38:19 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[Routing protocols]]></category>
		<category><![CDATA[administrative distance]]></category>
		<category><![CDATA[EIGRP]]></category>
		<category><![CDATA[OSPF]]></category>
		<category><![CDATA[redistribution]]></category>
		<category><![CDATA[RIP]]></category>
		<category><![CDATA[seed]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/2011/10/17/routing-protocol-redistribution-and-path-optimization/</guid>
		<description><![CDATA[Case A: Redistribution from one routing domain into another with higher (worse) administrative distance: All the following topologies are subject to the same concept: As an example, I picked up the case where the source routing domain is OSPF (AD=110) and the destination administrative domain is EIGRP (internal prefix AD =90 and external prefix AD [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=779&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>8</slash:comments>
	
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			<media:title type="html">cciethebeginning</media:title>
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		<title>BGP Backdoor</title>
		<link>http://cciethebeginning.wordpress.com/2011/09/21/bgp-backdoor/</link>
		<comments>http://cciethebeginning.wordpress.com/2011/09/21/bgp-backdoor/#comments</comments>
		<pubDate>Wed, 21 Sep 2011 23:20:13 +0000</pubDate>
		<dc:creator>cciethebeginning</dc:creator>
				<category><![CDATA[BGP]]></category>
		<category><![CDATA[Routing protocols]]></category>
		<category><![CDATA[troubleshooting]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[bgp table]]></category>
		<category><![CDATA[RIB]]></category>

		<guid isPermaLink="false">http://cciethebeginning.wordpress.com/2011/09/21/bgp-backdoor/</guid>
		<description><![CDATA[In this post I would like to share with you my experience with BGP backdoors along with some interesting observations related to the configuration. Picture 1: lab topology Our lab topology (picture1) illustrates two client autonomous systems connected to a backbone through eBGP (external). The backdoor link will be the direct connection between AS 64030 [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=cciethebeginning.wordpress.com&amp;blog=3180786&amp;post=702&amp;subd=cciethebeginning&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>1</slash:comments>
	
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