Cisco Terminal Server配置技巧(NHWIC-16A & NM-32A)
终端服务器配置:
终端服务器的异步口用一条Cisco扁平电缆连接到测试路由器的console口
interface loopback0
ip address 1.1.1.1 255.255.255.255
exita
line 1 16
no exec <- 禁用 EXEC 进程
transport input all <- 允许所有协议从line 1 - 16 使用
exit
telnet 1.1.1.1 2002 <- 反向telnet到接在 tty2 上路由器
ip host router1 2002 1.1.1.1 <- 主机表
terminal_server#show users all <- 查看连接的用户和接在哪个线路上
Ctrl+Shift+6，然后再按 x <- 返回到终端服务器;如果要完全退出，需要在当前界面输入exit再回车
line vty 0
password cisco
login
escape-character W <- 更改默认退出字符为 Ctrl + W(缺省为Ctrl+Shift+6)
terminal_server#show sessions <- 查看telnet会话 *为当前会话，回车连接，其它输入相应数字如：2
terminal_server#disconnect 2 <- 终止 telnet 会话(本机到远程)
terminal_server#clear line 1 <- 清除线路(别人到本机)
terminal_server#show line 1 <- 查看线路的状态
TS线缆状态：
接到router时相应指示灯会亮，swtich不会亮
如果出现如下提示：
% Connection refused by remote host
1.确保TS上配置如下语句
line 1 16
no exec
transport input all
2.target device配置如下语句
line con 0
session-timeout 30
exec-timeout 15 0
password Wh0ar3Y0u
line vty 0 4
session-timeout 30
exec-timeout 15 0
password Wh0ar3Y0u
login
transport input all
line vty 5 15
login
3.如果配置正确，在TS的consolde还是出现“Connection refused by remote host”
则需要检查TS-target两端的物理线缆，接头是否插入patch panel，两端线缆是否接通
4.如果采用登陆主机-->TS-->target登陆方式，此时出现“Connection refused by remote host”，则需连接到TS的console，清除上面挂起(或者出于连接状态)的sessions
sh session
dis 1
注意：
telnet到TS不能看到挂起或者已经连接的session，必须在console上查看
一旦退回到登陆主机，如果再次登陆target1，可以按1继续，或者先清除session，然后再行登陆
5.线缆不宜过多延长
6.一旦连接稳定，不要再插拔线缆
7.HWIC-16A调试
First check the output of show line command.
The first row is for console. It is always with the lowest number (0) followed by the async lines. The number of async lines varies by platform being used. The reverse telnet ports between 2000-2999 (ascii mode) and 6000-6999 (binary mode) range. The above command output will show the TTY line numbers being used and you have to add that number to 2000 and 6000 for example the first TTY line is 33 its reverse telnet port will be 2033 and 6033.
CNCNBEIW335FWAS01#sh line
Tty Line Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int
* 0 0 CTY - - - - - 12 0 0/0 -
1 1 AUX 9600/9600 - - - - - 0 0 0/0 -
* 0/0/0 2 TTY 9600/9600 - - - - - 4 32 0/0 -
0/0/1 3 TTY 9600/9600 - - - - - 2 36 0/0 -
如果0/0/0接rm01，则对应reverse telnet port就是2000+2=2002，不能像NM-32A那样随意定义端口;同理，0/0/1接rm02，则对应reverse telnet port为2003
ip host rm01 2002 165.46.234.72
ip host rm02 2003 165.46.234.72
上边的rm01只是一个标示符，真正起作用的是2002，即0/0/0线缆对应的设备
8.如果跨机架，是否需要rollover线缆？
不需要，
因为八爪鱼出来的线缆本身就是rollover线缆，所以跨机架跳线时用应该普通的直通网线
9.如何troubleshoot?
If you cannot connect to the router of your choice with a name configured in the ip host command check:
1. Check whether the port address is configured correctly.
Verify whether the address (interface) used for the reverse Telnet is up/up. The output of the show ip
interface brief command provides this information. Cisco recommends you to use loopbacks because
they are always up.
2.
Ensure that you have the correct type of cabling. For example, you must not use a crossover cable to
extend the length. Refer to the Cabling section for more information.
3.
Establish a Telnet connection to the IP address port to test direct connectivity. You must telnet from
both an external device and the terminal server. For example, telnet 172.21.1.1 2003.
4.
Ensure that you have the transport input telnet command under the line for the target device. The
target device is the device that is connected to the terminal server.
5.
Use a PC/dumb terminal to connect directly to the console of the target router. The target router is the
device connected to the terminal server. This step helps you identify the presence of a port issue.
6.
If you are disconnected, check timeouts. You can remove or adjust timeouts.
Note: If you encounter authentication failures, remember that the terminal server performs the first
authentication (if configured), while the device to which you try to connect performs the second
authentication (if configured). Verify whether AAA is configured correctly on both the terminal
server and the connecting device.