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伊林思_工业无线路由器OSPF链路类型(Link... 工业无线路由器OSPF链路类型(Link Type) 巧玲珑OSPF确实因为考虑问题的全面,而导致路由协议的复杂,OSPF不仅因为不同的二层链路层介质定义了不同的OSPF网络类型(Network Type),还因为链路上的邻居,而定义了OSPF链路类型(Link Type) 。 OSPF网络类型(Network...

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工业路由器的Network Summary LSA 工业路由器:Network Summary LSA ABR工业级路由器始发,用于通告该区域外部的目的地址, 可以使用show ip ospf database summary查看LSA 如果ABR知道有多条路径可以到达目标地址,但是它仍然只发送单个的Network Summary LSA,并且是开销最低的那条;同样,如果ABR从其他的ABR那里收到多条Network...

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工业4G路由器BGP邻居的flaping •工业路由器通过IGP学到对方loopback,并用looback建EBGP邻居 •又在BGP中通告此loopback。此时BGP邻居会出现flaping R1和R2之间运行一个IGP协议,比如说EIGRP。将环回口都宣告进去,这样R1和R2相互之间就有对方环回口的工业级路由器路由了,然后再用环回口建立EBGP邻居关系。最后再把2.2.2.0和1.1.1.0的环回口宣告进BGP。这时你会发现工业无线路由器BGP路由会发生flapping。 原因一:无线路由器 •首先R1和R2之间运行了EIGRP,学到对方的环回口工业级无线路由器路由是一条EIGRP路由,管理距离是90 •而当这两个环回口宣告进BGP后,R1和R2又通过BGP学到对方环回口路由,管理距离是20 •这时,全网工业级路由器BGP路由由于管理距离最小,会进入全网工业路由器路由表,取代EIGRP路由 •问题在于,现在的全网通工业路由器BGP路由是有问题的,下一跳是不可达的 R2收到的1.1.1.0的BGP路由下一跳是R1的环回口1.1.1.1 R1收到的2.2.2.0的BGP路由下一跳是R2的环回口2.2.2.2 •BGP有一个检查机制,每60S检查一次BGP路由,看是否有效,60S后就会检查到这些工业级全网通路由器路由并设为无效 •BGP路由无效以后,在路由表中就没有了,EIGRP路由又起作用了。 •有了EIGRP路由,BGP路由的下一跳有可达了。又有效了。 •BGP邻居有效以后,又会抢占了EIGRP路由的地位,又会导致全网通工业级路由器BGP路由下一跳不可达。 原因二:4g路由器 •首先R1和R2之间运行了EIGRP,学到对方的环回口工业全网通路由器路由是一条EIGRP路由,管理距离是90 •而当这两个环回口宣告进BGP后,R1和R2又通过BGP学到对方环回口路由,管理距离是20 •这时,工业级全网路由器BGP路由由于管理距离最小,会进入路由表,取代EIGRP路由 •问题在于,现在的工业4G路由器BGP路由是有问题的,下一跳是不可达的 R2收到的1.1.1.0的工业级4G路由器BGP路由下一跳是R1的环回口1.1.1.1 R1收到的2.2.2.0的BGP路由下一跳是R2的环回口2.2.2.2 •路由不可达就造成两个邻居之间没法发送keeplive •180S后BGP邻居关系超时,并DOWN掉。这时EIGRP路由又起作用了。 •有了EIGRP路由,BGP邻居关系又可以建立了。 •BGP邻居有效以后,工业全网路由器BGP路由又会抢占了EIGRP路由的地位,又会导致BGP邻居再一次DOWN掉。 标签:全网通路由器 ...

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工业路由器OSPF建立邻居到LSA的互换的交换过程 从工业路由器OSPF建立邻居,到LSA的互换,到路由表的计算,需要经过一系列的工业级路由器数据包交换过程,过程如下: Hello ↓ Database Description Packets (DBD) ↓ Link-state Request (LSR) ↓ Link-state update(LSU) ↓ LSDB 具体情况如下: Hello Hello包是用来建立和维护工业无线路由器OSPF邻居的,要交换LSA,必须先通过Hello包建立工业级无线路由器OSPF邻居。 Database...

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伊林思:工业4g路由器区域分离你清楚吗? 工业4g路由器区域分离 区域分离的操作与区域合并的正好相反。区域分离可以将原有的一个区域分离为两个不同的区域。如下图所示,R1与R2都为L1/2工业路由器。起初R1和R2属于同一个区域中,都拥有相同的区域地址49.0001,之间形成了L1和L2邻接关系,共享相同的L1和L2链路状态数据库。现在需要将这两个区域分离开。与区域合并一样,可以先赋予R2两个全网通工业路由器NET地址,区域地址分别为49.0001和49.0002。之后再将R2原先区域地址为49.0001的NET地址删除,这时由于R1和R2处于不同的区域,L1邻接关系将不存在,但L2邻接关系和L2链路状态数据将保留,此时便完成了全网通工业级路由器区域分离。 重编址 重编址过程与区域合并、区域分离相似,重编址可能需要清除一些或者全部工业级路由器的区域前缀,用新的区域前缀代替。如下图所示,现在希望将原先的49.0001区域迁移到49.0002区域,这就需要更改工业级无线路由器上的区域地址。R1和R2属于同一个区域49.0001中,要将R1和R2迁移到49.0002区域中,可以为R1和R2都赋予两个NET地址,两个NET地址包含不同的区域地址,49.0001和49.0002,然后依次删除R1和R2的包含49.0001区域地址的NET地址,这样就实现了工业无线路由器新的NSAP地址的无缝、无冲突的重新配置。 注意,IS-IS多宿主与IP中的辅助地址(secondanaryIP)是不同的,辅助地址可以在同一条工业级全网通路由器链路上创建多个隔离的逻辑子网。另外,辅助IP地址是在一条链路上配置多个子网。 工业无线路由器NSEL NSEL定义了网络层服务的用户,工业全网通路由器路由层是特殊的网络层服务用户,它的NSEL值为0。之前多次提到,在IS-IS工业4G路由器上配置的NSAP地址采用00作为NSEL,这时NSAP地址被称为NET。NSEL的值与IP报头中的协议类型或TCP/UDP报头中的TCP、UDP端口号类似,NSEL帮助网络层把数据发送到适当的应用程序或服务。在OSI分层模型中,网络层服务的是传输层。目标不是路由进程的CLNP数据包具有非0的NSEL值的NSAP地址,表示节点需要将数据发送到传输层。我们在使用IS-IS进行工业级4G路由器IP路由选择中,只要记住始终保持NSEL为00即可。全网通4g路由器

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What is 4G?

Category : 技术相关

What is 4G?
Short for “fourth generation,” 4G is the next generation of wireless communications succeeding the 2G (GSM), 2.5G (GPRS or EDGE) and the 3G network technologies. Digicel’s 4G network is now the fastest, most advanced cellular network in T&T.

Our 4G network is designed to provide instant and easy access to the internet via your phone, tablet or computer. On average users will experience speeds of 2Mbps. Actual speeds will vary depending on several factors including network traffic, device type and location.

What can I do with 4G?
With the power of Digicel’s 4G network and a 4G capable smartphone, everything is faster and your phone can do so much more…

1)Faster web browsing
2)Faster downloads (documents, photos, apps, music etc)
3)Faster photo & Video Uploads
4)Stream videos and music
5)Send and receive e-mails with large attachments faster
6)Video chat with friends & family
7) wireless M2M application
8) And so much more!

Does your application require 4G LTE or can you get by with 3G or 4G HSPA+?

Category : 技术相关

Depending on your application you may or may not need to have a device that supports 4G LTE. For example, take most Kiosk, ATM and POS applications, most transactions or data transmissions with be in KB, not MB’s so LTE isn’t as crucial. However, if you’ll be using these for occasional remote surveillance or digital signage applications the additional speed LTE offers could be a big factor to consider upgrading to 3G/4G LTE supported hardware. When you answer this question it will help you narrow down which equipment you should focus on.

What essential features a business router need?

Category : 技术相关

What essential features a business router need?A router is the heart of your network,Any essential features must to be.

1. Wi-Fi access point
2. Guest Wi-Fi access
3. Virtual LANs and multiple SSIDs
4. VPN Server and Client
5. USB port for printers or drives
6. Malware and spam protection
7. Dual or backup WAN port (or 4G support)
8. RADIUS server

Difference Wi-Fi And Wireless

Category : 技术相关

What difference between Wi-Fi, wireless?E-lins tell you detail.

We frequently encounter people who confuse the many possible meanings of “wireless” because they do not understand how the term is applied in different systems.

Wi-Fi is the abbreviated name of systems consisting of servers, routers and switches in various combinations to provide access to the Internet via wireless access points.

Wireless is a more comprehensive term used to describe any system for moving data at high speed over radio circuits instead of wires or cables.

Seven Steps Connecting to a VPN server or router in win7

Category : 技术相关

Seven Steps Connecting to a VPN server or router in win7

Step 1. In the Network and Sharing Centre (under Control Panel, Network and Internet), there is an option to “Set up a new connection or network.” The next step is to click on “Connect to a Workplace” in order to start the connection wizard, and then select “Use my Internet connection (VPN)” option to begin the process. If you have a 3G card installed, first of all you may see a prompt to use the 3G card instead of creating a “new” connection. In this case, you want the “new” connection so that you can use your existing Internet connection (yes, it’s a little confusing).

A far easier way to get to this point is to click on the Start button and type “VPN” in the search box. It will jump straight to the “Set up a virtual private network (VPN) connection” window in the wizard.

Step 2. In the Internet address field, enter the IP address of the VPN server or the network’s domain name. This information will usually be provided by the network administrator. If you are connecting to the home router, then you would put in the IP address of that router.

The destination name field displays the name users would see. If you aren’t going to connect right away, tick the “Don’t connect now; just set it up so I can connect later” box.

Leaving it unchecked means the client will try to make a connection at the end of the wizard. If there are multiple users on the Windows 7 box, you can either tick ”Allow other people to use this connection” to make the VPN connection available to others, or leave it unchecked to ensure no one else has the option.

Step 3. The next screen asks for a username and password. If you leave it blank, you will be prompted to enter the information when making the actual connection.

Step 4. The final window, if you selected “Don’t connect now,” will display a “Connect now” option. You can close the window now, or connect.

When you are ready to connect, just click on the network icon in the system tray (the icon could be for the wireless network or for the wired one) and the connection that was created earlier will show up in the list under “Dial-up and VPN.” You can also get here by clicking on “Connect to a network” under the Network and Sharing Centre.

Step 5. In the VPN connection box, enter the username and password to the VPN network, if it isn’t already pre-populated, along with the domain provided by the administrator. This connection should work for a majority of VPN networks.

Step 6. If the connection fails, click on Properties. The most common issue pertains to the server configuration. Select the “Security” tab in the Properties window. The “Type of VPN” should be set to Automatic. Check with the administrator if it should be set to PPTP, L2TP/IpSec, SSTP, or IKEv2. If it still doesn’t work, it’s possible you should uncheck “Include Windows logon domain” under the Options tab.

Step 7. After saving the properties, select Connect to launch the connection. You are now connected to a VPN server and your connection is safe.

Try A New DNS Server With A Fast Internet Connection

Category : 技术相关

When you type an address such as e-lins.com into your browser, your computers uses DNS to look up and translate that name into a computer-friendly IP address. Sometimes, though, the servers your computer uses to look up that information can have issues, or go down entirely. Check out our guide to finding the fastest DNS servers for more information. If your default DNS servers aren’t having problems, then you probably won’t find too much of an improvement with an alternative server — but it might speed up your browsing by a few milliseconds, at least. One reminder: if your provider offers unmetered browsing for services such as iView, be cautious when changing DNS details, since this can mean those services are metered and will count against your download allowance.

Six steps to make wireless router signal better

Category : 技术相关

E-lins’ll Tell you through six of the most useful fixes for Boosting your wireless router signal.

1.Change Your Wi-Fi routers operate on specific channels

2.Update router firmware

3.Update Adapter firmware.Just like routers, network adapters on PCs and laptops are also subject to firmware updates.

4.Set up a second router as an access point or repeater

5.Upgrade Router’s antennas

6.Stick to a single vendor

Common Use Windows Server Route Command

Category : 技术相关

List the 4 common used Route Command for Windows Server

1) route print    (display the current route table)
2) route add 192.168.8.0 mask 255.255.255.0 10.110.2.0 if 1 (add a static route)
3) route delete 192.168.8.0 (delete a static route)
4) route -p add 192.168.8.0 mask 255.255.255.0 10.110.2.0 (add a persistent/permanent route)

How to Setup VPN Server in Windows Server

Category : 技术相关

Windows Server support VPN Server features. Here let’s talk how to set up it.

Step1) Open “Server Manager“.

Step2) On the top menu, click on “Action” and “Add Roles“.

This will bring up the role installation wizard. On the first screen titled “Before your begin” read the requirements and click “Next” to continue.

Step3) Next, on the screen titled “Select Server Roles“, place check mark on “Network Policy and Access Services” and click “Next” to continue.

On the third screen titled “Network Policy and Access Services” read what it is stated and click “Next” to continue.

On the following screen titled “Select Role Services” place a check mark on “Routing and Remote Access Services” and make sure “Remote Access Service” and “Routing” are selected as well. Click “Next” to continue”.

Step4) Next, on the screen titled “Confirm Installation Selection“, you will get a summary of everything that will be installed. Make sure everything looks good and click on the “Install” button. Once the installation finishes, click “Close” to end the wizard.

Back on the main Server Manager window, right click on “Configure and Enable Routing and Remote Access“.

This will bring up the “Routing and Remote Access Wizard“. On the first window, click “Next“.

Step5) On the second window, select “Custom Configuration” and click “Next” to continue.

Step6) Next, place a check mark on “VPN access” and click “Next” to continue.

On the last screen of the wizard, click “Finish” and then click “Start Service” on the following window that will pop up.

Step7) Once the process is finished, and you are back on the main Server Manager window, routing and remote access should now be up and running.

Step8) Open Ports on the Firewall

For PPTP open:

Port 1723 TCP
Port 47 GRE

Step9) Give Domain Users Access to the VPN

If you are on a domain, go to your domain server, click on “Start“, “All Programs“, “Administrative Tools“, “Active Directory Users and Computers“.

Step10) On the left hand side column, look for your domain users. Double click on the user you want to give access to. This will bring up the properties for that user. Click on the “Dial-In” tab and under “Network Access Permission” select “Allow Access“. Click “Apply” and “Ok” to finish.

Repeat the same operation for all users on your network you want to give VPN access to. And that is it, as simple as that!

Now the VPN Server is set.

World’s fastest 4g router in E-lins

Category : 产品文章, 技术相关

E-lins 4G LTE router speed: Max. 100Mbps downlink, 50Mbps uplink
E-lins’s latest network upgrade, ‘LTE Advanced’ (built by Sierra FDD and ZTE TDD),‘LTE Advance’ uses a technology called ‘carrier aggregation’ which allows mobile signals to be carried across different spectrum simultaneously. Currently, access to E-lins’s Advanced network, which will be rolled out commercially beyond Tech City early next year.
The new network we’re switching on in Tech City uses the spectrum that we acquired in the Ofcom spectrum auction earlier this year, and is the first part of an infrastructure that can meet the future demands of an increasingly data-hungry nation.