在这篇文章里，我将简单介绍在MAC下如何搭建JAVA开发环境，以及对JAVA的HelloWorld的理解。网上有很多好用的教材，就不在此贴出了，可以去google，获baidu文库里找
1. 下载JDK7并安装：
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
关于JDK里包含的内容，下面这张图很形象
完整阅读
Requirement:
1. Capture interface tunnel port each 5 minutes, if traffics > X, will capture other information.
2. Store those information to disk0/harddisk.
In fact, the requirement is very easy by Python + CRT, but customer couldn’t find a PC to continue to run python script, so only use EEM + TCL on ASR9k. And in TCL script, I use two function: foreach and scan.
Follow CLI need config before do script, if you change any variable or script, you need re-config “event manager policy tac_te.tcl username cisco”:
aaa authorization eventmanager default local event manager environment _cron_entry1 */5 * * * * event manager directory user policy disk0: event manager policy tac_te.tcl username cisco persist-time 3600 type user
If customer want to focus a alarm on their NMS by SNMP Trap, they can config “snmp-server traps syslog”. But if customer no filter feature on NMS, they couldn’t find special alarm in all syslog, now we can use EEM + TCL to match customer requirement.
Follow TCL Script:
::cisco::eem::event_register_syslog pattern $_error_log occurs $_number period $_times maxrun 300 namespace import ::cisco::eem::* namespace import ::cisco::lib::* set alarm "***OOB_ERROR Happened!***" sys_reqinfo_snmp_trapvar var temp oid 1.1.1.1.1.1.1.1 string $alarm sys_reqinfo_snmp_trap enterprise_oid 1.3.6.1 generic_trapnum 6 specific_trapnum 2 trap_oid 1.1.1.1.1.1.1.1.1.1.1.1.1 trap_var temp
由于EVC平台在入端口可以通过rewrite命令剥离VLAN tag，这样导致在PW中没有任何tag，在Type 4时会有问题，两边VLAN的QOS无法传递给对端，所以就有了这个所谓的dummy vlan，它不是一个真正的VLAN，他只是传递一些QOS字段并且占一个位。那么dummy VLAN长什么样？其实大鹏之前的文章里已经详细介绍了EVC的各种行为，我这里只是介绍抓dummy VLAN的“心路历程”以及dummy VLAN的“样子”~
起始测试环境为VPLS BGP auto discovery + LDP Sig，在76的入向抓包
1. 默认Type 5，在CE1 ping 带cos 5，ASR9k-1在AC上不配置rewrite，透传的VLAN是否带着802.1p？根据抓包信息，正常带着802.1p，详细看“bgp-ldp-vlan-cos5.pcapng”；另外有个疑问，既然type 5支持VLAN透传，为什么还要Type 4？答案请看文章结束部分
完整阅读
