<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[blakegao的专栏]]></title><description><![CDATA[三千年读史，不外功名利禄；九万里悟道，终归诗酒田园。]]></description><link>https://blog.youkuaiyun.com/blakegao</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; blakegao]]></copyright><item><title><![CDATA[Upgrading ROMMONs in 6500s/7600s with SUP720]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/42921091</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/42921091</guid><author>blakegao</author><pubDate>Tue, 20 Jan 2015 17:37:54 +0800</pubDate><description><![CDATA[The Supervisor Engine 720 (or the Supervisor Engine 720-10GE) ROMMONs consists of two modules:
- A resident module that is not changed during the upgrade procedure. This is the Gold region one. 
- A]]></description><category></category></item><item><title><![CDATA[bit time/slot time/local collision/late conllision]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/42317923</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/42317923</guid><author>blakegao</author><pubDate>Thu, 01 Jan 2015 12:59:11 +0800</pubDate><description><![CDATA[这些概念比较原始了，普及下：


bit time：网卡生成一个bit所需要的时间
https://en.wikipedia.org/wiki/Bit_time


slot time：半双工网卡在发送脉冲前等待的最长时间，这个时间是脉冲从链路的一端穿越理论上支持的物理介质最长距离的所用时间。主要防止在一端网卡发送时，对端网卡已经向链路发送了脉冲导致在链路上形成 late  coll]]></description><category></category></item><item><title><![CDATA[show ip ospf里面的三个throtte timer]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/37572033</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/37572033</guid><author>blakegao</author><pubDate>Tue, 08 Jul 2014 20:33:52 +0800</pubDate><description><![CDATA[r1(config)#do show ip ospf
 Routing Process "ospf 1" with ID 1.1.1.1
 Start time: 00:19:59.880, Time elapsed: 00:00:10.552
 Supports only single TOS(TOS0) routes
 Supports opaque LSA
 Supports Li]]></description><category></category></item><item><title><![CDATA[Decrypting Cisco type 5 password hashes]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/35245025</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/35245025</guid><author>blakegao</author><pubDate>Fri, 27 Jun 2014 13:03:45 +0800</pubDate><description><![CDATA[Update #2: This article has been updated over athttp://retrorabble.wordpress.com/2013/10/12/cracking-cisco-password-hashes-part-2/

UPDATE:  See bottom of post for a way to run MD5 cracking on Linux]]></description><category></category></item><item><title><![CDATA[Cisco IOS NetFlow Command Reference]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/34858521</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/34858521</guid><author>blakegao</author><pubDate>Thu, 26 Jun 2014 16:51:49 +0800</pubDate><description><![CDATA[http://www.cisco.com/c/en/us/td/docs/ios/netflow/command/reference/nf_book.html]]></description><category></category></item><item><title><![CDATA[cisco ios 历史]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/34438345</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/34438345</guid><author>blakegao</author><pubDate>Wed, 25 Jun 2014 15:17:10 +0800</pubDate><description><![CDATA[早期的ios没有CLI命令行界面，在路由平台，从ios9.2开始引入了命令行编辑的特性。而]]></description><category></category></item><item><title><![CDATA[Troubleshooting VLAN Trunk Protocol (VTP)]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/30783461</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/30783461</guid><author>blakegao</author><pubDate>Sat, 14 Jun 2014 20:14:28 +0800</pubDate><description><![CDATA[http://www.cisco.com/c/en/us/support/docs/lan-switching/vtp/98155-tshoot-vlan.html]]></description><category></category></item><item><title><![CDATA[Catalyst 2960 and 2960-S Software -Configuring VTP]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/30781931</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/30781931</guid><author>blakegao</author><pubDate>Sat, 14 Jun 2014 20:08:51 +0800</pubDate><description><![CDATA[http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_53_se/configuration/guide/2960scg/swvtp.html#wp1205076]]></description><category></category></item><item><title><![CDATA[Cisco Extension Mobility]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/29639341</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/29639341</guid><author>blakegao</author><pubDate>Mon, 09 Jun 2014 22:15:22 +0800</pubDate><description><![CDATA[http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/6_0_1/ccmfeat/cmfsgd601/fsem.html



ExtensionMobility的配置步骤
 
整理者：Netoper99
 
基于CM Version :6.0.1
 
配置步骤如下：
Task 1: 检查 Extensio]]></description><category></category></item><item><title><![CDATA[CISCO Configuration Examples and TechNotes]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/29349929</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/29349929</guid><author>blakegao</author><pubDate>Sun, 08 Jun 2014 08:36:30 +0800</pubDate><description><![CDATA[Border Gateway Protocol (BGP)


Adjust Administrative Distance for Route Selection in Cisco IOS
 Routers Configuration Example   

Allowas-in Feature in BGP Configuration
 Example   

ASA/PIX]]></description><category></category></item><item><title><![CDATA[Cross-Platform Release Notes for Cisco IOS Release 15.4M&T]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/28720755</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/28720755</guid><author>blakegao</author><pubDate>Thu, 05 Jun 2014 23:02:01 +0800</pubDate><description><![CDATA[Table Of Contents
Features and Important Notes for Cisco IOS Release 15.4(1)T
New and Changed Information
New Hardware Features Supported in Cisco IOS Release
 15.4(1)T
New Software Features Supp]]></description><category></category></item><item><title><![CDATA[Cisco bgp command]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/26861057</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/26861057</guid><author>blakegao</author><pubDate>Sat, 24 May 2014 19:36:48 +0800</pubDate><description><![CDATA[http://www.cisco.com/c/en/us/td/docs/ios/12_2/iproute/command/reference/fiprrp_r/1rfbgp1.html#wp1017386]]></description><category></category></item><item><title><![CDATA[Embedded Event Manager 2.0]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/25839993</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/25839993</guid><author>blakegao</author><pubDate>Wed, 14 May 2014 23:22:11 +0800</pubDate><description><![CDATA[http://www.cisco.com/c/en/us/td/docs/ios/12_2s/feature/guide/fs_eem2.html#wp1125621






sage Guidelines


Instead of the five fields of a UNIX crontab entry as described in the syntax desc]]></description><category></category></item><item><title><![CDATA[Understanding and Configuring PPP CHAP Authentication]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/25461951</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/25461951</guid><author>blakegao</author><pubDate>Sat, 10 May 2014 10:13:54 +0800</pubDate><description><![CDATA[http://www.cisco.com/c/en/us/support/docs/wan/point-to-point-protocol-ppp/25647-understanding-ppp-chap.html]]></description><category></category></item><item><title><![CDATA[Control Plane Policing Implementation Best Practices]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/25309597</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/25309597</guid><author>blakegao</author><pubDate>Thu, 08 May 2014 15:20:57 +0800</pubDate><description><![CDATA[http://www.cisco.com/web/about/security/intelligence/coppwp_gs.html]]></description><category></category></item><item><title><![CDATA[云计算，云里雾里计算]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/25245083</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/25245083</guid><author>blakegao</author><pubDate>Wed, 07 May 2014 21:25:45 +0800</pubDate><description><![CDATA[《腾云》观后感，纯属个人技术总结，可能与作者观点有出入。

1 TRILL/FabricPath/SPB

首先肯定是传统二层网络有哪些困境或者不给力的地方喽：1 STP阻塞掉一半链路，浪费带宽；2 接入交换机MAC地址表空间会过大；3 为了二层互联而设置的三层网管限制了虚拟机的漂移。

关于MAC地址表详细说明一下：

因为传统的二层交换机是通过学习来建立MAC地址表的。怎么学习]]></description><category></category></item><item><title><![CDATA[VRF Route Leaking]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/25022369</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/25022369</guid><author>blakegao</author><pubDate>Mon, 05 May 2014 08:50:04 +0800</pubDate><description><![CDATA[http://blog.ipexpert.com/2010/12/01/vrf-route-leaking/


VPN Routing and Forwarding (VRF) separation is a powerful feature of modern network operating systems, including Cisco IOS that can be used ]]></description><category></category></item><item><title><![CDATA[CISCO BGP协议精简技术要点]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/25004043</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/25004043</guid><author>blakegao</author><pubDate>Sun, 04 May 2014 21:38:00 +0800</pubDate><description><![CDATA[CISCO BGP协议精简技术要点



1.    BGP特征1)      BGP是一种域间路由选择协议（IDRP），自主系统号是一个16位的数字，其取值范围为1~65535，64512~65535的AS号保留给私有:
2)      在不同自主系统中的路由器之间运行BGP时，被称为外部BGP（EBGP）；在位于同一个自主系统中的路由器之间运行BGP时，被称为内部BGP（IBGP）;]]></description><category></category></item><item><title><![CDATA[Understanding MSTP]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/24912399</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/24912399</guid><author>blakegao</author><pubDate>Sat, 03 May 2014 11:54:28 +0800</pubDate><description><![CDATA[http://blog.internetworkexpert.com/2008/07/27/mstp-tutorial-part-i-inside-a-region/


http://blog.ine.com/2008/09/24/mstp-tutorial-part-ii-outside-a-region/]]></description><category></category></item><item><title><![CDATA[Port Number 1253/tcp | What is Port 1253/tcp?]]></title><link>https://blog.youkuaiyun.com/blakegao/article/details/24770039</link><guid>https://blog.youkuaiyun.com/blakegao/article/details/24770039</guid><author>blakegao</author><pubDate>Wed, 30 Apr 2014 09:46:39 +0800</pubDate><description><![CDATA[http://www.corrupteddatarecovery.com/Port/1253tcp-Port-Type-q55-pcc-q55-pcc.asp]]></description><category></category></item></channel></rss>