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	<title>debugall &#187; Headers</title>
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	<link>http://www.debugall.co.uk</link>
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		<title>Frame-Relay  LMI</title>
		<link>http://www.debugall.co.uk/2009/01/15/frame-relay-lmi/</link>
		<comments>http://www.debugall.co.uk/2009/01/15/frame-relay-lmi/#comments</comments>
		<pubDate>Thu, 15 Jan 2009 04:59:58 +0000</pubDate>
		<dc:creator>Zarar</dc:creator>
				<category><![CDATA[CCNP]]></category>
		<category><![CDATA[FTP]]></category>
		<category><![CDATA[Headers]]></category>
		<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.debugall.co.uk/?p=649</guid>
		<description><![CDATA[What is LMI? LMI stands for Local Management Interface. LMI messages are exchanged between routers(DTE) and frame-relay(DCE) switches.  At its very basic we can say the LMI messages act as keepalives between the router and frame-relay switch.  LMI messages also contain information which allows routers to detect new PVCs dynamically.  Cisco IOS currently supports 3 [...]]]></description>
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		<title>ISIS header</title>
		<link>http://www.debugall.co.uk/2008/10/25/isis-header/</link>
		<comments>http://www.debugall.co.uk/2008/10/25/isis-header/#comments</comments>
		<pubDate>Sat, 25 Oct 2008 05:16:26 +0000</pubDate>
		<dc:creator>zismail</dc:creator>
				<category><![CDATA[CCIE SP]]></category>
		<category><![CDATA[Headers]]></category>
		<category><![CDATA[MPLS]]></category>
		<category><![CDATA[CCIE]]></category>
		<category><![CDATA[ISIS]]></category>

		<guid isPermaLink="false">http://www.debugall.co.uk/?p=58</guid>
		<description><![CDATA[Below is a diagram of the ISIS header.  The different ISIS packets ie hellos and SNPs have slightly different headers, however the first 8 bytes are identical. Click here to see a power point show on the isis header.]]></description>
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		<title>MPLS Header</title>
		<link>http://www.debugall.co.uk/2008/10/25/mpls-header/</link>
		<comments>http://www.debugall.co.uk/2008/10/25/mpls-header/#comments</comments>
		<pubDate>Sat, 25 Oct 2008 05:05:53 +0000</pubDate>
		<dc:creator>zismail</dc:creator>
				<category><![CDATA[CCIE SP]]></category>
		<category><![CDATA[Headers]]></category>
		<category><![CDATA[MPLS]]></category>

		<guid isPermaLink="false">http://www.debugall.co.uk/?p=50</guid>
		<description><![CDATA[This is what an MPLS label looks like.  The MPLS label contains a 20-bit label, dont get confused between the different uses of the word label. The 3 bit EXP bits are used for QoS purposes.  You can use them to define different tunnel modes, which I&#8217;ll talk about on another day. The S bit [...]]]></description>
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		<title>IP Packet Header</title>
		<link>http://www.debugall.co.uk/2008/10/25/ip-packet-header/</link>
		<comments>http://www.debugall.co.uk/2008/10/25/ip-packet-header/#comments</comments>
		<pubDate>Sat, 25 Oct 2008 04:48:17 +0000</pubDate>
		<dc:creator>zismail</dc:creator>
				<category><![CDATA[CCIE]]></category>
		<category><![CDATA[Headers]]></category>

		<guid isPermaLink="false">http://www.debugall.co.uk/?p=43</guid>
		<description><![CDATA[Below is a diagram of the IPv4 header.  The header is 20bytes long in most cases, however this can be extendend using the options field. Click here to see a power point version of the header.]]></description>
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