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	<title>Gent79&#039;s Blog</title>
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	<link>http://gent79.wordpress.com</link>
	<description>Bliss was it in that dawn to be alive</description>
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		<title>Gent79&#039;s Blog</title>
		<link>http://gent79.wordpress.com</link>
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		<item>
		<title>OSPF DN-bite</title>
		<link>http://gent79.wordpress.com/2011/11/19/ospf-dn-bite/</link>
		<comments>http://gent79.wordpress.com/2011/11/19/ospf-dn-bite/#comments</comments>
		<pubDate>Sat, 19 Nov 2011 15:04:26 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[OSPF]]></category>
		<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=221</guid>
		<description><![CDATA[To avoid routing loop in OSPF running between PE and CE, PE sets Down-bit in every LSA sending to CE. CE ignores all LSA with that bit, even through CE has already installed that LSAs into OSPF database.  Any routes sending from PE to  CE may be looped back by any other CE at elsewhere, [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=221&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">Gent79</media:title>
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	</item>
		<item>
		<title>LPTS</title>
		<link>http://gent79.wordpress.com/2011/11/14/lpts/</link>
		<comments>http://gent79.wordpress.com/2011/11/14/lpts/#comments</comments>
		<pubDate>Sun, 13 Nov 2011 18:54:32 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">https://gent79.wordpress.com/2011/11/14/lpts/</guid>
		<description><![CDATA[What CPU protection mechanism has been implemented on IOx to prevent any single or bunch of aggressive processes from exhausting CPU resource? LPTS &#8212;local packet transport service seems not be the guy to address such concern. In short words, LPTS is used to shield excessive traffic punting into LS or RSP &#8216;s scares CPU resource. [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=212&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">Gent79</media:title>
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	</item>
		<item>
		<title>Cisco QinQ / 802.1ad / 802.1ah</title>
		<link>http://gent79.wordpress.com/2011/11/13/qinq/</link>
		<comments>http://gent79.wordpress.com/2011/11/13/qinq/#comments</comments>
		<pubDate>Sun, 13 Nov 2011 12:29:23 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[802.1ad]]></category>
		<category><![CDATA[Cisco]]></category>
		<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=204</guid>
		<description><![CDATA[&#160; Definitions:       B-Component: A bridging component contained in a BEB that bridges in provider space (Backbone MAC addresses, B-VLAN).       Backbone Core Bridge: An S-VLAN bridge used within the core of a PBBN.     Backbone Edge Bridge: A backbone edge bridge positioned at the edge of PBBN that encapsulates customer frames for transmission across a PBBN. [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=204&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">Gent79</media:title>
		</media:content>

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			<media:title type="html">802.1ad</media:title>
		</media:content>
	</item>
		<item>
		<title>Cisco ASR9K flow-based Mofrr</title>
		<link>http://gent79.wordpress.com/2011/10/28/cisco-asr9k-flow-based-mofrr/</link>
		<comments>http://gent79.wordpress.com/2011/10/28/cisco-asr9k-flow-based-mofrr/#comments</comments>
		<pubDate>Thu, 27 Oct 2011 17:15:00 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>
		<category><![CDATA[mVPN]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=200</guid>
		<description><![CDATA[MoFRR is designed to work at minimum flow traffic rate 3Mbps. Once traffic go below the support rate, we are expecting to see those messages on some groups but no actual traffic is lost.<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=200&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
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	</item>
		<item>
		<title>Rosen mVPN + RIB-based Mofrr</title>
		<link>http://gent79.wordpress.com/2011/10/28/rosen-mvpn-rib-based-mofrr/</link>
		<comments>http://gent79.wordpress.com/2011/10/28/rosen-mvpn-rib-based-mofrr/#comments</comments>
		<pubDate>Thu, 27 Oct 2011 17:14:19 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>
		<category><![CDATA[mVPN]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=198</guid>
		<description><![CDATA[<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=198&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
		</media:content>
	</item>
		<item>
		<title>mvpn rosen model</title>
		<link>http://gent79.wordpress.com/2011/10/27/mvpn-rosen-model/</link>
		<comments>http://gent79.wordpress.com/2011/10/27/mvpn-rosen-model/#comments</comments>
		<pubDate>Thu, 27 Oct 2011 13:27:10 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>
		<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=186</guid>
		<description><![CDATA[In MVPN rosen model, if SSM is used in the core, default MDT should be always UP, so that mVPN control messages could be exchanged on this plane. In other words, all P/PE routers involved in SSM multicast tree, should hold (S,G) entries, whose number be equals to of PE routers. mVPN PE forms two [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=186&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
		</media:content>

		<media:content url="http://gent79.files.wordpress.com/2011/10/mvpn_gre1.png" medium="image">
			<media:title type="html">mvpn_gre</media:title>
		</media:content>
	</item>
		<item>
		<title>BGP as-override</title>
		<link>http://gent79.wordpress.com/2011/10/25/bgp-as-override/</link>
		<comments>http://gent79.wordpress.com/2011/10/25/bgp-as-override/#comments</comments>
		<pubDate>Tue, 25 Oct 2011 06:32:31 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>
		<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=184</guid>
		<description><![CDATA[BGP as-override feature is applied to the outbound BGP update at Egress PE.<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=184&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">Gent79</media:title>
		</media:content>
	</item>
		<item>
		<title>How to prove LDP IGP unsync issue</title>
		<link>http://gent79.wordpress.com/2011/10/21/how-to-prove-ldp-igp-unsync-issue/</link>
		<comments>http://gent79.wordpress.com/2011/10/21/how-to-prove-ldp-igp-unsync-issue/#comments</comments>
		<pubDate>Fri, 21 Oct 2011 07:57:42 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>
		<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=179</guid>
		<description><![CDATA[<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=179&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
		</media:content>
	</item>
		<item>
		<title>Exploring MVPN in Cisco solution</title>
		<link>http://gent79.wordpress.com/2011/10/13/exploring-mvpn-in-cisco-solution/</link>
		<comments>http://gent79.wordpress.com/2011/10/13/exploring-mvpn-in-cisco-solution/#comments</comments>
		<pubDate>Wed, 12 Oct 2011 19:28:21 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=174</guid>
		<description><![CDATA[This post does not aim to illustrate MVPN configuration step by step, Cisco has done this job pretty well. I just want to dispel some of my confusion about MVPN solution, especially mLDP. 1) how to build up P2MP tunnel after user multicast traffic exceeds the defined threshold ? what&#8217;s the detail of corresponding MPLS [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=174&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
		</media:content>
	</item>
		<item>
		<title>inet_bind ( ) function</title>
		<link>http://gent79.wordpress.com/2011/10/12/169/</link>
		<comments>http://gent79.wordpress.com/2011/10/12/169/#comments</comments>
		<pubDate>Tue, 11 Oct 2011 21:13:54 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Linux Kernel]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=169</guid>
		<description><![CDATA[the call flow of bind( ) function can boil down to a terse flow like this:  sys_socketcall ( ) &#8212;&#62; sys_bind ( ) &#8212;&#62; inet_bind ( );  I took a snippet of inet_bind ( ) function below: int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) { struct sockaddr_in *addr = (struct sockaddr_in *)uaddr; struct [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=169&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
		</media:content>
	</item>
		<item>
		<title>OSPF MTU</title>
		<link>http://gent79.wordpress.com/2011/10/11/ospf-mtu/</link>
		<comments>http://gent79.wordpress.com/2011/10/11/ospf-mtu/#comments</comments>
		<pubDate>Mon, 10 Oct 2011 20:41:09 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>
		<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=165</guid>
		<description><![CDATA[This is definitely not a new subject. Most of us have stumbled across it in lab or production network. Tonight, we just finish one migration stage for an Indonesia ISP, migrating from 7600 PE to ASR9k PE. most existing PE routers are peering with other CISCO routers, some of them have OSPF running between. When [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=165&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
		</media:content>
	</item>
		<item>
		<title>QPPB</title>
		<link>http://gent79.wordpress.com/2011/08/27/qppb/</link>
		<comments>http://gent79.wordpress.com/2011/08/27/qppb/#comments</comments>
		<pubDate>Fri, 26 Aug 2011 17:36:50 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">https://gent79.wordpress.com/2011/08/27/qppb/</guid>
		<description><![CDATA[QPPB can address some QOS or route enforcement policy issue on ISP network. Here are some obscure questions regarding the feature: 1. why ip-QOS-group and pref-group can apply to an interface at the same time?<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=163&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
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	</item>
		<item>
		<title>The spirit of MPLS</title>
		<link>http://gent79.wordpress.com/2011/08/24/testing-word-2010/</link>
		<comments>http://gent79.wordpress.com/2011/08/24/testing-word-2010/#comments</comments>
		<pubDate>Wed, 24 Aug 2011 06:31:01 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/2011/08/24/testing-word-2010/</guid>
		<description><![CDATA[MPLS is pushing the intelligence to the edge routers and leaving the core LSR for simple label switching. The edge LSR determines the FEC once, there&#8217;s no need to perform next-hop checking, outgoing interface checking at any point of LSP. Very good mpls te article to dispel some obscure and crucial points which most of [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=151&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
		</media:content>
	</item>
		<item>
		<title>BGP in mVPN</title>
		<link>http://gent79.wordpress.com/2011/08/23/bgp-in-mvpn/</link>
		<comments>http://gent79.wordpress.com/2011/08/23/bgp-in-mvpn/#comments</comments>
		<pubDate>Mon, 22 Aug 2011 16:15:15 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">https://gent79.wordpress.com/2011/08/23/bgp-in-mvpn/</guid>
		<description><![CDATA[My brain got stuck when I was throwing a question to myself: what BGP is playing in mvpn solution. Following the data path to envision how a packet is transmitting in this network architecture is an eminently useful method. ok, let roll out to explore mvpn, multicast packets are receiving at mVRF on an CE-facing [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=148&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
		</media:content>
	</item>
		<item>
		<title>IP SLA and EEM work together via SNMP</title>
		<link>http://gent79.wordpress.com/2010/12/08/ip-sla-and-eem-work-together-via-snmp/</link>
		<comments>http://gent79.wordpress.com/2010/12/08/ip-sla-and-eem-work-together-via-snmp/#comments</comments>
		<pubDate>Wed, 08 Dec 2010 08:04:36 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[SP]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/2010/12/08/ip-sla-and-eem-work-together-via-snmp/</guid>
		<description><![CDATA[This testing gives an overview, how IP SLA can work in conjunction with EEM remotely. R1: IP SLA source router is intended to spy on the voice quality, MOS value. The following commands define the criteria of how and when a trigger is generated. When measured MOS value lowers than 4.9 or exceeds than 5, [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=142&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
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		<title>IOS display TCP and UDP session</title>
		<link>http://gent79.wordpress.com/2010/07/29/ios-display-tcp-and-udp-session/</link>
		<comments>http://gent79.wordpress.com/2010/07/29/ios-display-tcp-and-udp-session/#comments</comments>
		<pubDate>Thu, 29 Jul 2010 01:56:15 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco Tricks and Tips]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/2010/07/29/ios-display-tcp-and-udp-session/</guid>
		<description><![CDATA[R-HQ#show control-plane host open-ports Active internet connections (servers and established) Prot Local Address Foreign Address Service State tcp *:23 *:0 Telnet LISTEN tcp *:30038 142.100.64.12:2428 IOS host service ESTABLIS tcp *:28255 142.100.64.11:2428 IOS host service ESTABLIS tcp *:1720 *:0 H.225 LISTEN tcp *:5061 *:0 CCSIP_TLS_SOCKET LISTEN tcp *:5060 *:0 SIP LISTEN udp *:67 *:0 DHCPD [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=134&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">Gent79</media:title>
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		<title>MPLS Inter-AS VPN Option C</title>
		<link>http://gent79.wordpress.com/2010/06/17/mpls-inter-as-vpn-option-c/</link>
		<comments>http://gent79.wordpress.com/2010/06/17/mpls-inter-as-vpn-option-c/#comments</comments>
		<pubDate>Thu, 17 Jun 2010 10:14:50 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/2010/06/17/mpls-inter-as-vpn-option-c/</guid>
		<description><![CDATA[MPLS Inter-AS VPN Option C Some objectives must be achieved to successfully bring up Option C environment. Propogate customer VPNV4 route and associated labels. In order to take scalability into consideration, Route-reflector is used to exchange VPNV4. Propogate RR and PE loopback to remote AS. BGP approach:                   3 labels used VPN label PE label [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=118&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
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		<item>
		<title>Inter-AS MPLS/VPN Option B</title>
		<link>http://gent79.wordpress.com/2010/05/14/inter-as-mplsvpn-option-b/</link>
		<comments>http://gent79.wordpress.com/2010/05/14/inter-as-mplsvpn-option-b/#comments</comments>
		<pubDate>Fri, 14 May 2010 09:25:22 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/2010/05/14/inter-as-mplsvpn-option-b/</guid>
		<description><![CDATA[Inter-AS MPLS/VPN Option B To get a full appreciation of how&#8217;s option B working, let&#8217;s compare it with option A. In option A scenario, the two ASBR is treating each other as original VPN CE client, so pure ip packets are transiting on the link. In contrast to forwarding pure ip packet, MPLS labeled packet [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=111&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Gent79</media:title>
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		<item>
		<title>Inter-AS MPLS/VPN  Option A</title>
		<link>http://gent79.wordpress.com/2010/05/13/inter-as-mplsvpn-option-a-2/</link>
		<comments>http://gent79.wordpress.com/2010/05/13/inter-as-mplsvpn-option-a-2/#comments</comments>
		<pubDate>Thu, 13 May 2010 01:45:57 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/2010/05/13/103/</guid>
		<description><![CDATA[Inter-AS MPLS/VPN Option A The testbed shown below comprises 6 P/PE routers and 2 VPN. BGP sessions are confined in separated AS. For the sake of simplicity, CE-PE routing is achieved via static routes. Note: in my test, I uses static route between two ASBRs in place of eBGP. In this case, the testing didn&#8217;t [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=103&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<item>
		<title>IPV6 Testing&#8212;Based on Cisco,Linux</title>
		<link>http://gent79.wordpress.com/2010/05/11/ipv6-testing-based-on-ciscolinux/</link>
		<comments>http://gent79.wordpress.com/2010/05/11/ipv6-testing-based-on-ciscolinux/#comments</comments>
		<pubDate>Tue, 11 May 2010 06:59:14 +0000</pubDate>
		<dc:creator>Gent79</dc:creator>
				<category><![CDATA[Cisco]]></category>

		<guid isPermaLink="false">http://gent79.wordpress.com/?p=71</guid>
		<description><![CDATA[Without the tremendous functions Linux provides, I couldn&#8217;t go deeper in the road of seeking network technologies.&#160; Learning Linux really help me broaden my vision. The feeling of freely use linux skills is really indescribable ^_^. After 2 days&#8217; hard work,&#160; I successfully emulated the ipv6 testbed on my lovable Gentoo server.&#160; So far, all [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=gent79.wordpress.com&amp;blog=11756513&amp;post=71&amp;subd=gent79&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">ipv6-T1</media:title>
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			<media:title type="html">ipv6-T2</media:title>
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