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	<title>Networkers-online.com &#187; CISCO HOW-TO</title>
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	<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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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>VRF Lite</title>
		<link>http://www.networkers-online.com/blog/2009/02/vrf-lite/</link>
		<comments>http://www.networkers-online.com/blog/2009/02/vrf-lite/#comments</comments>
		<pubDate>Sun, 15 Feb 2009 12:21:45 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[CISCO HOW-TO]]></category>
		<category><![CDATA[MPLS]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=177</guid>
		<description><![CDATA[// The word VRF stands for Virtual Routing and Forwarding, this feature is used to create multiple instances of the routing table on the same routing device. VRFs are usally used in conjunction with MPLS VPN to separate the traffic of multiple MPLS VPN customers. VRF Lite feature is part of Cisco&#8217;s network virtualization portfolio. [...]


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		<slash:comments>7</slash:comments>
		</item>
		<item>
		<title>BGP Route Reflector Basics</title>
		<link>http://www.networkers-online.com/blog/2009/02/bgp-route-reflector-basics/</link>
		<comments>http://www.networkers-online.com/blog/2009/02/bgp-route-reflector-basics/#comments</comments>
		<pubDate>Thu, 12 Feb 2009 21:20:41 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[BGP]]></category>
		<category><![CDATA[CISCO HOW-TO]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=166</guid>
		<description><![CDATA[// Everyone who ever studied BGP knows that BGP has strong rules to prevent routing and updates loops. In this post I will focus on iBGP loop prevention and specifically route reflectors as a result. The rule states: that any route received from an iBGP neighbor must not be advertised to any other iBGP neighbor. This loop [...]


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		<slash:comments>14</slash:comments>
		</item>
		<item>
		<title>distribute-list gateway with OSPF</title>
		<link>http://www.networkers-online.com/blog/2008/10/distribute-list-gateway-with-ospf/</link>
		<comments>http://www.networkers-online.com/blog/2008/10/distribute-list-gateway-with-ospf/#comments</comments>
		<pubDate>Sat, 18 Oct 2008 13:54:32 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[CISCO HOW-TO]]></category>
		<category><![CDATA[OSPF]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=81</guid>
		<description><![CDATA[The following example is showing how to use distribute-list with the gateway option for inbound route filtering  in OSPF. The diagram below shows R1 directly connected to R2 with OSPF configured between them. Initial Configuration: !-- R1 OSPF configuration router ospf 1 router-id 1.1.1.1 log-adjacency-changes network 172.16.12.1 0.0.0.0 area 0 network 172.16.101.1 0.0.0.0 area 0 [...]


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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>BGP Default-Originate insights</title>
		<link>http://www.networkers-online.com/blog/2008/10/bgp-default-originate-insights/</link>
		<comments>http://www.networkers-online.com/blog/2008/10/bgp-default-originate-insights/#comments</comments>
		<pubDate>Thu, 16 Oct 2008 15:01:49 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[BGP]]></category>
		<category><![CDATA[CISCO HOW-TO]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=74</guid>
		<description><![CDATA[BGP has multiple ways of advertising a default route to its neighbors;  the neighbor default-originate command is one of these methods and used to advertise a default route to a specific neighbor. Below are some characteristics of the default route advertised by this way. Originator router: Default route does not need to be existing in [...]


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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>How-to: Avoid DNS lookup when mistyping a command</title>
		<link>http://www.networkers-online.com/blog/2008/08/how-to-avoid-dns-lookup-when-mistyping-a-command/</link>
		<comments>http://www.networkers-online.com/blog/2008/08/how-to-avoid-dns-lookup-when-mistyping-a-command/#comments</comments>
		<pubDate>Wed, 06 Aug 2008 10:57:40 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[CISCO HOW-TO]]></category>
		<category><![CDATA[IP Services]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=40</guid>
		<description><![CDATA[If domain lookup is enabled (default) the router treats each mistyped command as a hostname and tries to resolve its IP address by querying the DNS server. This behavior is undesirable in most cases because it wastes network administrators time waiting for routers trying to resolve mistyped commands. R2#xyz Translating "xyz"...domain server (255.255.255.255) Translating "xyz"...domain [...]


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		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>How-to: Configure Private VLANs</title>
		<link>http://www.networkers-online.com/blog/2008/07/how-to-configure-private-vlans/</link>
		<comments>http://www.networkers-online.com/blog/2008/07/how-to-configure-private-vlans/#comments</comments>
		<pubDate>Wed, 30 Jul 2008 13:24:21 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[Bridging & Switching]]></category>
		<category><![CDATA[CISCO HOW-TO]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=39</guid>
		<description><![CDATA[This is a master piece post from Petr Lapukhov explaining Private VLANs; what are they ? and how to configure and troubleshoot them ?. I am sure you will never get confused by Private VLANs anymore. Private VLANs revisited Read and understand No related posts. Related posts brought to you by Yet Another Related Posts [...]


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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>How-to: Configure Spanning Tree Protocol Part3</title>
		<link>http://www.networkers-online.com/blog/2008/07/how-to-configure-spanning-tree-protocol-part3/</link>
		<comments>http://www.networkers-online.com/blog/2008/07/how-to-configure-spanning-tree-protocol-part3/#comments</comments>
		<pubDate>Wed, 30 Jul 2008 12:52:05 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[Bridging & Switching]]></category>
		<category><![CDATA[CISCO HOW-TO]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=37</guid>
		<description><![CDATA[After explaining how STP works to ensure your network is free of bridging loops in previous posts, we are going directly to a configuration example. We will use a simple topology in the diagram below and configure the switches to accomplish the tasks listed below. Task1: Configure SW0 as a root bridge for both VLAN1,2. [...]


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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>How-to: Configure Spanning tree protocol Part2</title>
		<link>http://www.networkers-online.com/blog/2008/07/how-to-configure-spanning-tree-protocol-part2/</link>
		<comments>http://www.networkers-online.com/blog/2008/07/how-to-configure-spanning-tree-protocol-part2/#comments</comments>
		<pubDate>Tue, 29 Jul 2008 08:56:15 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[Bridging & Switching]]></category>
		<category><![CDATA[CISCO HOW-TO]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=36</guid>
		<description><![CDATA[In the first post STP part1, we discussed the root bridge election process, that was the first step in calculating the spanning tree topology. Lets dive and explore step2. Step2: Best Path selection After choosing and agreeing on the root switch for the domain, each switch starts looking for the shortest path to the root [...]


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		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>How-to: Configure spanning tree protocol (STP) Part1</title>
		<link>http://www.networkers-online.com/blog/2008/07/how-to-configure-spanning-tree-protocol-stp-part1/</link>
		<comments>http://www.networkers-online.com/blog/2008/07/how-to-configure-spanning-tree-protocol-stp-part1/#comments</comments>
		<pubDate>Thu, 24 Jul 2008 21:32:02 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[Bridging & Switching]]></category>
		<category><![CDATA[CISCO HOW-TO]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=35</guid>
		<description><![CDATA[// = 200; google_ad_height = 200; // ]]&#62; As we mentioned in one of our previous posts, STP was developed to allow redundancy in the L2 network while maintaining a loop free network. Today we are going to discover how STP is actually doing this function. Step1: Electing the root bridge What is the root [...]


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		<slash:comments>5</slash:comments>
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