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如何将一个路由器模拟成Frame-Relay交换机。

frame-relay switching

interface Serial1/1
no ip address
encapsulation frame-relay
serial restart-delay 0
clock rate 64000
frame-relay intf-type dce
frame-relay route 102 interface Serial1/2 201
frame-relay route 103 interface Serial1/3 301
!
interface Serial1/2
no ip address
encapsulation frame-relay
shutdown
serial restart-delay 0
clock rate 64000
frame-relay intf-type dce
frame-relay route 201 interface Serial1/1 102
frame-relay route 203 interface Serial1/3 302
!
interface Serial1/3
no ip address
encapsulation frame-relay
shutdown
serial restart-delay 0
clock rate 64000
frame-relay intf-type dce
frame-relay route 301 interface Serial1/1 103
frame-relay route 302 interface Serial1/2 203

首先是frame-relay switching.

接下来，在接口中配置。

interface Serial1/1
no ip address
encapsulation frame-relay #封装
serial restart-delay 0
clock rate 64000 #速率
frame-relay intf-type dce #要设置成DCE
frame-relay route 102 interface Serial1/2 201 #注意这里，前面是出的，后面是进入的。
frame-relay route 103 interface Serial1/3 301 #比如103是1->3的DLCI，从s1/1出去，进入s1/3，其中对于s1/3的DLCI是301.
!

当我们登录到一台路由器/交换机之后（无论真实设备还是模拟器），首先需要做的是：

Router(config)#hostname R1
R1(config)#no ip domain lookup
R1(config)#line console 0
R1(config-line)#logging synchronous
R1(config-line)#no exec-timeout

作用分别是：

1. 指定Hostname
2. 关闭域名查找，避免打错命令浪费时间
3. logging synchronous的作用就是会让提示出来之后，依旧保存用户之前输入的命令
4. 使得终端不会超时

看一下使用synchronous之前的提示：

Router(config)#int e0/0
Router(config-if)#no shut
Router(config-if)# ip add 192.
*Mar 1 00:34:04.370: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up
*Mar 1 00:34:05.372: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to up168.1.1 255.255.255.0
Router(config-if)#

之后

Router(config)#int e0/0
Router(config-if)#no sh
Router(config-if)#ip add 192.16
*Mar 1 00:35:37.294: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up
*Mar 1 00:35:38.296: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to up
Router(config-if)#ip add 192.168.1.1 255.255.255.0
Router(config-if)#

最近WSUS不太正常，看本地的log，有一段：

2008-09-03 07:11:21:555 872 224 Misc WARNING: WinHttp: SendRequestToServerForFileInformation failed with 0x80190194
2008-09-03 07:11:21:555 872 224 Misc WARNING: WinHttp: ShouldFileBeDownloaded failed with 0x80190194
2008-09-03 07:11:21:555 872 224 Misc WARNING: DownloadFileInternal failed for http://update.nau.edu.cn/selfupdate/wuident.cab: error 0x80190194
2008-09-03 07:11:21:555 872 224 Setup FATAL: IsUpdateRequired failed with error 0x80244019

注意红色部分。

查看IIS的虚拟目录，selfupdate果然没有了...

解决方法：

Open the IIS Manager console
Drill down to the Default Web Site, right click it and select New -> Virtual Directory
For the alias use Selfupdate and for the path point to the Selfupdate directory. It should be something like C:\Program Files\Update Services\Selfupdate.
Forward through the wizard selecting all the defaults.

参见：http://blogs.technet.com/sus/archive/2008/08/14/wsus-clients-fail-to-update-with-error-code-0x80190194.aspx