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	<title>Networkers-online.com &#187; ISIS</title>
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	<link>http://www.networkers-online.com/blog</link>
	<description>Networkers&#039; Home on the Internet</description>
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		<title>How to: use IS-IS overload bit</title>
		<link>http://www.networkers-online.com/blog/2010/08/how-to-use-is-is-overload-bit/</link>
		<comments>http://www.networkers-online.com/blog/2010/08/how-to-use-is-is-overload-bit/#comments</comments>
		<pubDate>Mon, 30 Aug 2010 13:37:12 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[CISCO HOW-TO]]></category>
		<category><![CDATA[ISIS]]></category>
		<category><![CDATA[Network Design]]></category>

		<guid isPermaLink="false">http://www.networkers-online.com/blog/?p=560</guid>
		<description><![CDATA[Overload bit is special bit in the IS-IS LSP used to inform the network that the advertising router is not yet ready to forward transit traffic.  The overload bit was first intended for signaling overload or resource shortage on specific router for the rest of the network. You can use the command set-overload-bit intentionally on [...]


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<li><a href='http://www.networkers-online.com/blog/2010/04/the-endless-story-of-ospf-vs-is-is/' rel='bookmark' title='Permanent Link: The endless story of OSPF vs IS-IS'>The endless story of OSPF vs IS-IS</a> <small>Whenever you have a little IGP chit chat you&#8217;ll hit...</small></li>
<li><a href='http://www.networkers-online.com/blog/2010/05/the-endless-story-of-ospf-vs-is-is-part-4-the-inside-out/' rel='bookmark' title='Permanent Link: The endless story of OSPF vs IS-IS &#8211; Part 4 &#8220;The Inside Out&#8221;'>The endless story of OSPF vs IS-IS &#8211; Part 4 &#8220;The Inside Out&#8221;</a> <small>In this post we&#8217;ll be covering a couple of topics...</small></li>
</ol>

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		<wfw:commentRss>http://www.networkers-online.com/blog/2010/08/how-to-use-is-is-overload-bit/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>The endless story of OSPF vs IS-IS &#8211; Part 4 &#8220;The Inside Out&#8221;</title>
		<link>http://www.networkers-online.com/blog/2010/05/the-endless-story-of-ospf-vs-is-is-part-4-the-inside-out/</link>
		<comments>http://www.networkers-online.com/blog/2010/05/the-endless-story-of-ospf-vs-is-is-part-4-the-inside-out/#comments</comments>
		<pubDate>Sat, 22 May 2010 19:22:47 +0000</pubDate>
		<dc:creator>mmahmoud</dc:creator>
				<category><![CDATA[Bury the hatchet]]></category>
		<category><![CDATA[IGP]]></category>
		<category><![CDATA[ISIS]]></category>
		<category><![CDATA[Network Design]]></category>
		<category><![CDATA[OSPF]]></category>
		<category><![CDATA[Routing]]></category>

		<guid isPermaLink="false">http://www.networkers-online.com/blog/?p=448</guid>
		<description><![CDATA[In this post we&#8217;ll be covering a couple of topics from the Inside Out of the link-state protocols that have always been ambiguous and full of details, we&#8217;ll try to make them as crystal clear as we can. MTU: Both link-state routing protocols consider MTU in order to prevent any related problems, mainly loss of [...]


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<li><a href='http://www.networkers-online.com/blog/2010/05/the-endless-story-of-ospf-vs-is-is-part-3-packets-and-database/' rel='bookmark' title='Permanent Link: The endless story of OSPF vs IS-IS &#8211; Part 3 &#8220;Packets and Database&#8221;'>The endless story of OSPF vs IS-IS &#8211; Part 3 &#8220;Packets and Database&#8221;</a> <small>In this post we are going to cover the protocol...</small></li>
<li><a href='http://www.networkers-online.com/blog/2010/04/the-endless-story-of-ospf-vs-is-is/' rel='bookmark' title='Permanent Link: The endless story of OSPF vs IS-IS'>The endless story of OSPF vs IS-IS</a> <small>Whenever you have a little IGP chit chat you&#8217;ll hit...</small></li>
</ol>

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		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>The endless story of OSPF vs IS-IS &#8211; Part 3 &#8220;Packets and Database&#8221;</title>
		<link>http://www.networkers-online.com/blog/2010/05/the-endless-story-of-ospf-vs-is-is-part-3-packets-and-database/</link>
		<comments>http://www.networkers-online.com/blog/2010/05/the-endless-story-of-ospf-vs-is-is-part-3-packets-and-database/#comments</comments>
		<pubDate>Sun, 16 May 2010 20:57:30 +0000</pubDate>
		<dc:creator>mmahmoud</dc:creator>
				<category><![CDATA[Bury the hatchet]]></category>
		<category><![CDATA[IGP]]></category>
		<category><![CDATA[ISIS]]></category>
		<category><![CDATA[Network Design]]></category>
		<category><![CDATA[OSPF]]></category>
		<category><![CDATA[Routing]]></category>

		<guid isPermaLink="false">http://www.networkers-online.com/blog/?p=435</guid>
		<description><![CDATA[In this post we are going to cover the protocol packets and database structure for both routing protocols. To start let&#8217;s first highlight a couple of facts. OSPF runs on top of IP, that is it uses IP packets to exchange its messages (and thus it is vulnerable to spoofing and DoS attacks, and accordingly [...]


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<li><a href='http://www.networkers-online.com/blog/2010/04/the-endless-story-of-ospf-vs-is-is-part-2-the-history/' rel='bookmark' title='Permanent Link: The endless story of OSPF vs IS-IS &#8211; Part 2 &#8220;The history&#8221;'>The endless story of OSPF vs IS-IS &#8211; Part 2 &#8220;The history&#8221;</a> <small>In our previous post we started consolidating the endless story...</small></li>
<li><a href='http://www.networkers-online.com/blog/2010/04/is-is-dis-in-practice/' rel='bookmark' title='Permanent Link: IS-IS DIS in Practice'>IS-IS DIS in Practice</a> <small>In the previous post IS-IS Neighbor Discovery we have discussed...</small></li>
</ol>

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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>The endless story of OSPF vs IS-IS &#8211; Part 2 &#8220;The history&#8221;</title>
		<link>http://www.networkers-online.com/blog/2010/04/the-endless-story-of-ospf-vs-is-is-part-2-the-history/</link>
		<comments>http://www.networkers-online.com/blog/2010/04/the-endless-story-of-ospf-vs-is-is-part-2-the-history/#comments</comments>
		<pubDate>Mon, 26 Apr 2010 20:30:43 +0000</pubDate>
		<dc:creator>mmahmoud</dc:creator>
				<category><![CDATA[Bury the hatchet]]></category>
		<category><![CDATA[IGP]]></category>
		<category><![CDATA[ISIS]]></category>
		<category><![CDATA[Network Design]]></category>
		<category><![CDATA[OSPF]]></category>
		<category><![CDATA[Routing]]></category>

		<guid isPermaLink="false">http://www.networkers-online.com/blog/?p=427</guid>
		<description><![CDATA[In our previous post we started consolidating the endless story of OSPF vs IS-IS, in this post we will cover the historical part of the story, it might not be interesting for some people, but I do believe that the history is what makes the future, so please bare with me through this post. The [...]


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<li><a href='http://www.networkers-online.com/blog/2010/03/bgp-route-refresh-capability/' rel='bookmark' title='Permanent Link: BGP Route Refresh Capability'>BGP Route Refresh Capability</a> <small>Service Providers or Large enterprises commonly change routing policies from...</small></li>
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</ol>

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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>IS-IS DIS in Practice</title>
		<link>http://www.networkers-online.com/blog/2010/04/is-is-dis-in-practice/</link>
		<comments>http://www.networkers-online.com/blog/2010/04/is-is-dis-in-practice/#comments</comments>
		<pubDate>Mon, 12 Apr 2010 11:40:09 +0000</pubDate>
		<dc:creator>Mounir Mohamed</dc:creator>
				<category><![CDATA[ISIS]]></category>
		<category><![CDATA[IS-IS DIS]]></category>
		<category><![CDATA[IS-IS DIS LAN-ID]]></category>
		<category><![CDATA[ISIS DIS]]></category>

		<guid isPermaLink="false">http://www.networkers-online.com/blog/?p=370</guid>
		<description><![CDATA[In the previous post IS-IS Neighbor Discovery we have discussed how IS-IS automatically discovers neighbors, in this post we will discuss the DIS role in broadcast networks. After the adjacency state reached the UP state the DIS election process take place, the router with the highest priority value (0-127 specified in the Priority field of [...]


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<li><a href='http://www.networkers-online.com/blog/2010/04/the-endless-story-of-ospf-vs-is-is/' rel='bookmark' title='Permanent Link: The endless story of OSPF vs IS-IS'>The endless story of OSPF vs IS-IS</a> <small>Whenever you have a little IGP chit chat you&#8217;ll hit...</small></li>
<li><a href='http://www.networkers-online.com/blog/2010/03/is-is-mtu-mismatch/' rel='bookmark' title='Permanent Link: IS-IS MTU Mismatch'>IS-IS MTU Mismatch</a> <small>IS-IS uses the concept of distributed map or database, each...</small></li>
</ol>

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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>IS-IS Neighbor Discovery</title>
		<link>http://www.networkers-online.com/blog/2010/04/is-is-neighbor-discovery/</link>
		<comments>http://www.networkers-online.com/blog/2010/04/is-is-neighbor-discovery/#comments</comments>
		<pubDate>Mon, 12 Apr 2010 11:16:51 +0000</pubDate>
		<dc:creator>Mounir Mohamed</dc:creator>
				<category><![CDATA[ISIS]]></category>
		<category><![CDATA[IIH]]></category>
		<category><![CDATA[ISIS hello]]></category>

		<guid isPermaLink="false">http://www.networkers-online.com/blog/?p=373</guid>
		<description><![CDATA[Like other routing and signaling protocols IS-IS has built-in automatic neighbor discovery mechanism which is known by IIHs (IS-IS Hello PDUs), because IS-IS is not IP based protocol the IIH PDUs and all other IS-IS PDUs are directly encapsulated on the data-link layer. IS-IS has two hierarchical levels (L1 and L2) and two network types [...]


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<li><a href='http://www.networkers-online.com/blog/2010/04/the-endless-story-of-ospf-vs-is-is/' rel='bookmark' title='Permanent Link: The endless story of OSPF vs IS-IS'>The endless story of OSPF vs IS-IS</a> <small>Whenever you have a little IGP chit chat you&#8217;ll hit...</small></li>
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		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>The endless story of OSPF vs IS-IS</title>
		<link>http://www.networkers-online.com/blog/2010/04/the-endless-story-of-ospf-vs-is-is/</link>
		<comments>http://www.networkers-online.com/blog/2010/04/the-endless-story-of-ospf-vs-is-is/#comments</comments>
		<pubDate>Sun, 04 Apr 2010 11:10:38 +0000</pubDate>
		<dc:creator>mmahmoud</dc:creator>
				<category><![CDATA[Bury the hatchet]]></category>
		<category><![CDATA[IGP]]></category>
		<category><![CDATA[ISIS]]></category>
		<category><![CDATA[Network Design]]></category>
		<category><![CDATA[OSPF]]></category>
		<category><![CDATA[Routing]]></category>

		<guid isPermaLink="false">http://www.networkers-online.com/blog/?p=349</guid>
		<description><![CDATA[Whenever you have a little IGP chit chat you&#8217;ll hit this endless story. I&#8217;ve tried to reach a final solid conclusion my self but IMHO its all about personal preference and taste. It is something like a Ferrari vs Lamborghini story, they offer comparable performance, but totally different feeling. It is all about a good [...]


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<li><a href='http://www.networkers-online.com/blog/2010/03/is-is-mtu-mismatch/' rel='bookmark' title='Permanent Link: IS-IS MTU Mismatch'>IS-IS MTU Mismatch</a> <small>IS-IS uses the concept of distributed map or database, each...</small></li>
<li><a href='http://www.networkers-online.com/blog/2010/02/mtu-and-ping-size-confusion/' rel='bookmark' title='Permanent Link: MTU and ping size confusion'>MTU and ping size confusion</a> <small>I am very glade to return back after pausing posting...</small></li>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>IS-IS MTU Mismatch</title>
		<link>http://www.networkers-online.com/blog/2010/03/is-is-mtu-mismatch/</link>
		<comments>http://www.networkers-online.com/blog/2010/03/is-is-mtu-mismatch/#comments</comments>
		<pubDate>Thu, 25 Mar 2010 07:38:41 +0000</pubDate>
		<dc:creator>Mounir Mohamed</dc:creator>
				<category><![CDATA[ISIS]]></category>
		<category><![CDATA[isis mtu mismatch]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=304</guid>
		<description><![CDATA[IS-IS uses the concept of distributed map or database, each router originates LSPs for his own links and relays its adjacent  LSPs to build up the distributed map, a local computation is performed on the database to extract IP reachability information to formalize the forwarding plane. What is the problem? IS-IS is an extended protocol [...]


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		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>IS-IS and fast convergence ongoing tricks</title>
		<link>http://www.networkers-online.com/blog/2009/03/is-is-and-fast-convergence-ongoing-tricks/</link>
		<comments>http://www.networkers-online.com/blog/2009/03/is-is-and-fast-convergence-ongoing-tricks/#comments</comments>
		<pubDate>Sun, 22 Mar 2009 10:27:09 +0000</pubDate>
		<dc:creator>mmahmoud</dc:creator>
				<category><![CDATA[Bury the hatchet]]></category>
		<category><![CDATA[ISIS]]></category>
		<category><![CDATA[MPLS]]></category>
		<category><![CDATA[Network Design]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=193</guid>
		<description><![CDATA[Been a while since my last post, I was extremely busy doing a lot of things, anyway I am glade to be back. This post I am going to cover a nice tool for enhancing IS-IS convergence, I am really amazed by the ideas that the guys out there pop up. Inventing such wonderful tools [...]


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</ol>

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		<slash:comments>6</slash:comments>
		</item>
		<item>
		<title>OSPF &amp; IS-IS Router ID</title>
		<link>http://www.networkers-online.com/blog/2009/03/ospf-is-is-router-id/</link>
		<comments>http://www.networkers-online.com/blog/2009/03/ospf-is-is-router-id/#comments</comments>
		<pubDate>Mon, 02 Mar 2009 08:34:30 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[ISIS]]></category>
		<category><![CDATA[OSPF]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=187</guid>
		<description><![CDATA[When you think about Router ID in any link state protocol  two requirements come to mind: Each router must be identified by a Router ID and an Area to exist in. This Router ID must be unique inside a single IGP domain. IS-IS refers to the this ID as a System ID (SysID) and OSPF [...]


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<li><a href='http://www.networkers-online.com/blog/2010/02/mtu-and-ping-size-confusion/' rel='bookmark' title='Permanent Link: MTU and ping size confusion'>MTU and ping size confusion</a> <small>I am very glade to return back after pausing posting...</small></li>
<li><a href='http://www.networkers-online.com/blog/2010/03/bgp-4-byte-asn/' rel='bookmark' title='Permanent Link: BGP 4-Byte ASN'>BGP 4-Byte ASN</a> <small>The internet growth is awesome, day by day people recognizes...</small></li>
</ol>

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		<slash:comments>4</slash:comments>
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