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	<title>『无题』 &#187; Classical CASE</title>
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	<description>I persist, therefore I am!!!</description>
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		<title>OSPF Alarm for %OSPF-4-FLOOD_WAR</title>
		<link>http://www.zhaocs.info/ospf-flood-war.html</link>
		<comments>http://www.zhaocs.info/ospf-flood-war.html#comments</comments>
		<pubDate>Tue, 15 Feb 2011 18:00:44 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[学习笔记]]></category>
		<category><![CDATA[OSPF]]></category>

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		<description><![CDATA[根据下面的logging复习各个知识点 1w0d: OSPF: DR/BDR election on TenGigabitEthernet6/4 1w0d: OSPF: Elect BDR 0.0.0.0 1w0d: OSPF: Elect DR 7.7.7.7 1w0d: DR: 7.7.7.7 (Id) BDR: none 1w0d: OSPF: Rcv DBD from 8.8.8.8 on TenGigabitEthernet6/4 seq 0x2... ]]></description>
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		<slash:comments>1</slash:comments>
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		<item>
		<title>Layer 3 层网络中的重定向</title>
		<link>http://www.zhaocs.info/icmp-redirect-l3.html</link>
		<comments>http://www.zhaocs.info/icmp-redirect-l3.html#comments</comments>
		<pubDate>Mon, 14 Feb 2011 15:57:41 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[学习笔记]]></category>
		<category><![CDATA[ICMP]]></category>

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		<description><![CDATA[问题： CPU Peak 解决： 设备从某端口收到的数据包又根据路由从此端口发送出去，这样导致了重定向的产生，并且关掉重定向后，cpu恢复正常。那么到底是什么数据包导致cpu高呢？是cpu发的icmp... ]]></description>
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		<title>关于“clear arp”的一些问题</title>
		<link>http://www.zhaocs.info/clear-arp-issue.html</link>
		<comments>http://www.zhaocs.info/clear-arp-issue.html#comments</comments>
		<pubDate>Sun, 11 Jul 2010 05:21:33 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[学习笔记]]></category>
		<category><![CDATA[arp]]></category>

		<guid isPermaLink="false">http://www.zhaocs.info/?p=51546</guid>
		<description><![CDATA[当在汇聚交换机上“clear arp”会发现arp表项会自动update，而无法删除。已经确认汇聚层交换机与接入层交换机之间没有任何流量，感觉交换机会自动发送arp信息。 经确认，发现是问题与Adj表有... ]]></description>
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		<title>FlexWan lost config and upgrade ROMMON for 65/76</title>
		<link>http://www.zhaocs.info/upgrade_rommon.html</link>
		<comments>http://www.zhaocs.info/upgrade_rommon.html#comments</comments>
		<pubDate>Thu, 10 Jun 2010 04:53:08 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[学习笔记]]></category>
		<category><![CDATA[7600]]></category>

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		<description><![CDATA[问题： 由于最近遇到了一个故障，重启后FlexWan的配置会丢失。 观察到的现象感觉是配置先刷，板卡随后重启，这样导致没有配置。 “copy start run” 可以暂时解决这个问题。 经过确认后这是一... ]]></description>
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		<title>ICMP 重定向的一些问题</title>
		<link>http://www.zhaocs.info/icmp-redirect.html</link>
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		<pubDate>Mon, 15 Feb 2010 08:44:26 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[学习笔记]]></category>
		<category><![CDATA[ICMP]]></category>

		<guid isPermaLink="false">http://www.zhaocs.info/?p=51325</guid>
		<description><![CDATA[前端时间跟朋友遇到一个问题，一部分PC能上外网，另一部分不能上外网。 经检查，发现能上网的PC都是定制的windows xp，不能上网的都是定制的windows server。 而且在xp上ping外网测试，在route print... ]]></description>
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		<title>3560 output drop affect voice vibrate</title>
		<link>http://www.zhaocs.info/3560-output-drop-voice-vibrate.html</link>
		<comments>http://www.zhaocs.info/3560-output-drop-voice-vibrate.html#comments</comments>
		<pubDate>Thu, 31 Dec 2009 23:16:46 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[QOS]]></category>

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		<description><![CDATA[Refer to 3560 output drop increase issue. All voice in one vlan 36. And have some data vlan. Follow are topology(summary): &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- +-----------+ +-----------+ &#124; 6509 &#124; &#124; 6509 ... ]]></description>
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		<title>Static BFD Configuration Summary</title>
		<link>http://www.zhaocs.info/static-bfd-configuration.html</link>
		<comments>http://www.zhaocs.info/static-bfd-configuration.html#comments</comments>
		<pubDate>Tue, 22 Dec 2009 09:56:37 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[CCIE SP]]></category>
		<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[BFD]]></category>

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		<description><![CDATA[由于最近处理一个静态BFD的问题。 在此贴出BFD的配置及相关的资源链接供大家参考。 关于相关BFD协议的内容和他的模式问题，本想用dynamips加12.2(33)SRC来做测试并抓包分析，但发现一配置BFD，... ]]></description>
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		<title>ISDN E1 PVDM2-xxDM callback</title>
		<link>http://www.zhaocs.info/isdn_pvdm2-xxdm_callback-2.html</link>
		<comments>http://www.zhaocs.info/isdn_pvdm2-xxdm_callback-2.html#comments</comments>
		<pubDate>Sat, 14 Nov 2009 15:00:58 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[ISDN]]></category>

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		<description><![CDATA[Topology: PC(modem)&#8212;&#8212;&#8212;-ISDN&#8212;&#8212;&#8212;(E1 Pri)2811(PVDM2) Configuration: network-clock-participate wic 0 network-clock-select 1 E1 0/0/0 ! isdn switch-type primary-net5 ! chat-script offhook1 "" "ATH1" OK \c chat-script callba... ]]></description>
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		<title>ISDN PVDM2-xxDM Dialer</title>
		<link>http://www.zhaocs.info/isdn_pvdm2-xxdm.html</link>
		<comments>http://www.zhaocs.info/isdn_pvdm2-xxdm.html#comments</comments>
		<pubDate>Sat, 14 Nov 2009 13:38:22 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[ISDN]]></category>

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		<description><![CDATA[ISDN Dialer fail for PVDM2 From Show diag: &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211; CISCO2821 HWIC-1CE1T1-PRI PV... ]]></description>
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		<title>NTP Summarize</title>
		<link>http://www.zhaocs.info/ntp-summarize.html</link>
		<comments>http://www.zhaocs.info/ntp-summarize.html#comments</comments>
		<pubDate>Thu, 06 Aug 2009 19:41:53 +0000</pubDate>
		<dc:creator>frank</dc:creator>
				<category><![CDATA[CCIE SP]]></category>
		<category><![CDATA[Classical CASE]]></category>
		<category><![CDATA[NTP]]></category>

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		<description><![CDATA[As everyone knows, the NTP is sync clock protocol. That knowledge less other protocol. But there are some attention: &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; 1. When you config more than one serve... ]]></description>
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