最近天氣詭譎多變、世界各地異常四起,鳥類集體死亡、魚群集體暴斃,大風大雨、外加酷熱酷冷的天氣,真叫人有點不安.難怪最近國外有些宗教團體,宣稱2011/5/21是世界末日(據新聞媒體報導,此團體先前也曾預言,但如今地球還是相安無事),有種山雨欲來的前兆.到底這次的預言會不會成真,就有待時間的證明.
一早起床就覺得天氣超冷的,出生在南部的我,即使台北待了有將近20年的時間(包含求學與就業),對這樣冷颼颼的天氣也覺得很不習慣,更何況是這幾年來.臭氧層破裂及地球暖化與溫室效應等現象,對地球有無影響,我想最近幾年天氣的改變應該多少能反映些. 從工業革命自今,地球在人類追求發展、高度的開發而破壞原有地球的生態,在歷經眾多的年代後,以逐漸感受到大自然的反撲,正慢慢地蠶食著我們,就如同現今的天氣,早已不是我們熟悉且能掌控的環境.
這們冷的天氣,家裡又有兩個小朋友,當然是窩在家裡最舒服了,不需要外出吹冷風,畢竟家裡比外面還要溫暖.原本想要趁著老媽回高雄,天氣晴郎的時候自助式洗車,也因為外頭正飄著細雨而作罷.心理想著:"既然是老天爺的安排,洗車的事情就留待下星期車子保養的時候再一併處理". 因為上次車子出險的時候,將費用轉嫁到下次車子保養的工資上,所以要趁著期限到期前趕快處理.所以今天一整天,就在家當個窄男吧!
而小朋友呢? 上星期才考完試,目前正等著放寒假(真好!),就讓他們痛快的玩電玩吧! 當然,時間也要控制,眼睛也要注意保養.
時間過得真快,轉眼又到晚上的時間,這種冷颼颼的夜晚,當然是要吃火鍋才過癮,可惜的是,老婆沒有準備食材,只能隨便吃吃填飽肚子. 不知道是要省錢還是最近較忙,忙著關切韓劇,所以忘記了準備. 為了討好她,身為窄男的我,花了些時間了解是否可即時同步觀看韓劇.拜網路盛行,果然有善心人士提供此服務,真好! 果然工業發展所產出的誘因,早已讓人類暫時忘記自然環境被破害將帶來的日後的災難,畢竟時間還要很久才會發生(或許不會發生),人類真是短視啊(包含我自己!)
就如同今天晚上就寢時,氣象報導下探7度,處在現今科技文明下的我,並不會有任何感覺.原因是:待在家裡有舒服的被被,即使天氣很冷也可以開電暖器保溫,所以根本不覺得有什們影響.
這就像是井底的青蛙,沒見過世面,不知道目前外部的世界與變化,以為外面的世界就同眼中的環境般.所以才會拼命地製造些對環境有所危害的CO2,因為自己根本不覺得溫度降個1、2度有何差別.難怪會有人預言: 地球將滅亡!
唉! 不知道會不會發生在我這一代? 或是真的會發生? 但我知道的,日後糧食短缺一定會發生的,畢竟氣候變化無常會影響的動、植物的生長.果然這是大自然的預警,不可不慎阿!
不必問我是誰,我就像您一樣:僅是位平凡人,但卻想在人生旅途上留下生活的足跡! 哪怕是過程跌跌撞撞、經歷風風雨雨,只要有您的關注,就是我最大的欣慰與成就!!! 感謝您的蒞臨:) 下一個職涯十年信念:不到最後關頭,決不輕言放棄!!!
2011年1月15日 星期六
2011年1月9日 星期日
Configure VLAN on Cisco device(Part II)
Last time, we discuss about "how to configure VLAN on switch". Its objective express
1.Teach you to set trunk between Router and Switch
2.Teach you to set VLAN on Router for different VLAN segment
After doing the above steps, the traffic in different VLAN segment can exchange message.
Today, we will expand Switch and PC device and verify the VLAN function. This Lab will be similar with the production environment and can satisfy the practice necessity.
The network diagram is as follow:
In this Lab, we want to let the package of vlan 10 and vlan 20 can exchange but vlan 1 fail with vlan 10 or vlan 20.
How to do it now?
(1).Configure Switch in the left-panel
Enable configuration and change hostname
Set parameter on console terminal line
Add vlans to the vlan database
Configure a trunk port for Router
Configure a trunk port for sw2
Configure access ports 2~3 and vlan 10 for PC1 & PC2
Verify vlan setting
Building configuration
(3).Configure Router
Enable the fa1/0 interface
Configure Subinterfaces vlan and ip
1.Teach you to set trunk between Router and Switch
2.Teach you to set VLAN on Router for different VLAN segment
After doing the above steps, the traffic in different VLAN segment can exchange message.
Today, we will expand Switch and PC device and verify the VLAN function. This Lab will be similar with the production environment and can satisfy the practice necessity.
The network diagram is as follow:
In this Lab, we want to let the package of vlan 10 and vlan 20 can exchange but vlan 1 fail with vlan 10 or vlan 20.
How to do it now?
(1).Configure Switch in the left-panel
Enable configuration and change hostname
Set parameter on console terminal line
Add vlans to the vlan database
Configure a trunk port for Router
Configure a trunk port for sw2
Configure access ports 2~3 and vlan 10 for PC1 & PC2
Verify vlan setting
Building configuration
(2).Configure Switch in the right-panel
Enable configuration
Set parameter on console terminal line
Add vlans to the vlan database
Configure a trunk port for sw1
Configure access ports 3~4 and vlan 20 for PC5 & PC6
Verify vlan setting
Building configuration
(3).Configure Router
Enable configuration
Set parameter on console terminal line
Enable the fa1/0 interface
Configure Subinterfaces vlan and ip
Verify vlan and ip setting
Building configuration
(3).Set network parameter on PC1 ~ PC6
(4).Test IP Connectivity by ping command
on PC1, we can ping vlan 10 & 20, but vlan 1 fail
on PC3, we can ping vlan 1, but vlan 10 & 20 fail
on PC5, we can ping vlan 10 & 20, but vlan 1 fail
So the result that the procedure is proved is right in this lab now.
- Configure PC1 (vlan 10)
IP address: 172.16.10.2 Subnet Mask:255.255.255.0 Gateway:171.16.10.1
- Configure PC2 (vlan 10)
IP address: 172.16.10.3 Subnet Mask:255.255.255.0 Gateway:171.16.10.1
- Configure PC3 (vlan 1)
IP address: 172.16.1.2 Subnet Mask:255.255.255.0 Gateway:171.16.1.1
- Configure PC4 (vlan 1)
IP address: 172.16.1.3 Subnet Mask:255.255.255.0 Gateway:171.16.1.1
- Configure PC5 (vlan 20)
IP address: 172.16.20.2 Subnet Mask:255.255.255.0 Gateway:171.16.20.1
- Configure PC6 (vlan 20)
IP address: 172.16.20.3 Subnet Mask:255.255.255.0 Gateway:171.16.20.1
(4).Test IP Connectivity by ping command
on PC1, we can ping vlan 10 & 20, but vlan 1 fail
on PC3, we can ping vlan 1, but vlan 10 & 20 fail
on PC5, we can ping vlan 10 & 20, but vlan 1 fail
So the result that the procedure is proved is right in this lab now.
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©Copyright Davidwa Inc. All rights reserved.