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cisco查看端口命令-Cisco ios系统中删除子接口的方法与命令

发布时间:2017-11-21 所属栏目:cisco查看端口状态

一 : Cisco ios系统中删除子接口的方法与命令

  Cisco IOS的概念

  IOS配置通常是通过基于文本的命令行接口(Command Line Interface,CLI)进行的。

  Cisco的网际操作系统(IOS:Internetwork Operating System)是一个为网际互连优化的复杂的操作系统。是一个与硬件分离的软件体系结构,随网络技术的不断发展,可动态地升级以适应不断变化的技术(软件)。

  公司内网整改,需要重新划分VLAN,想要删除Cisco ios 的子接口该怎么办?删除子接口的命令有哪些?请和61阅读的小编一起来看一下。

  举个例子,还原f0/0的所有配置到默认。

  (config)# default interface f0/0接口f0/0会重起。

  例:


  C2610XM(config)#default interface fa0/0Building configuration…
  Interface FastEthernet0/0 set to default configurationC2610XM(config)#

  但show run子接口依然存在,重启后仍然存在。


  C2610XM(config)#default inter fa1/0
  Building configuration…
  Interface FastEthernet1/0 set to default configurationC2610XM(config)#do show run | b interface FastEthernet1/0interface FastEthernet1/0
  no ip address
  duplex auto
  speed auto
  !

  看来这个命令对子接口无效。

  也可以用no命令,例:


  C2610XM(config)#no interface fastEthernet 0/0.52Not all config may be removed and may reappear after reactivating the sub-interfaceC2610XM(config)#

  这样就删除了fa0/0.52子接口

  删除fa0/0.2子接口


  C2610XM(config)#no interface FastEthernet0/0.2Not all config may be removed and may reappear after reactivating the sub-interfaceC2610XM(config)#

  以上就是Cisco ios 删除子接口的2个命令,谢谢阅读,希望能帮到大家,请继续关注61阅读,我们会努力分享更多优秀的文章。

二 : cisco查看端口状态命令

cisco查看端口状态命令
在MS-DOS窗口里敲入命令telnet+IP地址,回车,即可远程登录路由器。一般用路由器局域网口地址。
1,用R1#sh ip int b命令查看端口状态
R1#sh ip int b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 100.100.100.226 YES NVRAM up up
FastEthernet0/1 200.200.200.226 YES NVRAM up up
Serial0/0/0 72.22.81.102 YES NVRAM up up
Serial0/0/1 72.22.81.109 YES NVRAM up up
正常情况下,思科1800路由器四个端口的Status和protocol都是up的。

2,用R1#sh int s0/0/0查看链路状态和通道情况
Serial0/0/0 is up, line protocol is up //接口与协议都已启动(正常)
Serial0/0/0 is up, line protocol is down //接口启动,协议没有匹配成功(端口无物理故障,但通道不通)
Serial0/0/0 is down, line protocol is down //接口与协议都DOWN掉(协转没有工作)
Serial0/0/0 is down,line protocol is down(disable)//端口出现物理性故障,需更换端口。
Serial0/0/0 is administratively down,line protocol is down //接口关闭,可用命令打开。
Serial0/0/0 is up, line protocol is down(looped) //此通道上有环(无论在协转、DDF架、SDH上做环,在路由器里看到的显示是一样的)。

Serial0 is up, line protocol is down
Hardware is PowerQUICC Serial
Interface is unnumbered. Using address of FastEthernet0/0 (172.22.128.193)
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255 //通道的可靠性
Encapsulation PPP, LCP Listen, loopback not set
Last input 00:00:27, output 00:00:27, output hang never
Last clearing of "show interface" counters 00:02:52 //上次计数器清零到现在的时间
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/2/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
30 packets input, 420 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
6552 input errors, 0 CRC, 4 frame, 0 overrun, 0 ignored, 0 abort// 输入错误包数量
60 packets output, 840 bytes, 0 underruns
0 output errors, 0 collisions, 9 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
通道的可靠性,正常值是255/255,如果低于254将会造成丢包。可靠性越低,通道越差,错误包越多。

DCD 数据载体检测DTE CARrfer derect
DSR 数据设置就绪DATA SET READY
DTR 数据终端就绪DTE IS READY
RTS 请求发送Reguest To Send
CTS 清除发送Clear To send

3,路由器端口计数器清零
有故障的通道往往造成路由器接口的输入错误包数量很高,不便于比较查看。这时最好把接口数据包计数器清零,使其重新开始计数。用R1#clear coun命令清零。
R1#clear coun

4,判断以太网端口故障
用R1#sh int f0/0 来检查以太网口及其链路的状态,如下所示:
R1#sh int f0/0
FastEthernet 0 is up,line protocol is up //连接正常
Ethernet 0 is up,line protocol is down //连接故障,路由器没有连接到局域网
Ethernet 0 is down,line protocol is down(disable) //接口故障
Ethernet 0 is administratively down,line protocol is down //接口被关闭,可用命令打开

5,查看相邻路由器
用R2#sh cdp nei命令查看相邻路由器,输出如下:
R2#sh cdp nei
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID
R1 Ser 0/0/0 133 R S I 1841 Ser 0/0/1
S2_SW1 Fas 0/0 125 S I WS-C2960-2Fas 0/6
S2_SW2 Fas 0/1 140 S I WS-C2960-2Fas 0/22
R3 Ser 0/0/1 156 R S I 1841 Ser 0/0/0
此命令可以查看到相邻的思科路由器和思科交换机,可以验证设备是否相通,以及连接关系是否正确。

6,观察路由器告警和报错信息
路由器发生故障或状态发生变化的时候,会发出告警、报错、提示信息。如果是用telnet命令登录路由器的话,不能直接看到这些信息,需要输入R1# ter mon命令后,才能使这些信息显示在MS-DOS窗口上。
R1#ter mon
该命令可以使你及时了解路由器状态变化,便于发现和排除故障。

三 : Cisco交换机range命令的使用,批处理改变多个端口设置

Cisco交换机range命令的使用,批处理改变多个端口设置

在Cisco交换机里面有一个非常有用的命令,开始刚学习的时候不知道,走了不少弯路。这个命令可以用一次改变多个端口的设置。换句话说,如果你需要在交换机的许多个端口上进行相同的操作,不需要一个一个端口的设置,只需要一个命令就可以了。这个命令就是“range”,例如下: www.2cto.com

S1(config)#interface range fastEthernet 0/1-24

S1(config-if-range)#no shutdown

//注意:从这儿开始是交换机改变设置时自动显示的端口变化情况

%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up

%LINK-5-CHANGED: Interface FastEthernet0/2, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up

%LINK-5-CHANGED: Interface FastEthernet0/3, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up

%LINK-5-CHANGED: Interface FastEthernet0/4, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/5, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/6, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/7, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/8, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/9, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/10, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/11, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/12, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/13, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/14, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/15, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/16, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/17, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/18, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/19, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/20, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/21, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/22, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/23, changed state to down

%LINK-5-CHANGED: Interface FastEthernet0/24, changed state to down

S1(config-if-range)#

还可以用show running...验证下,很好玩。

扩展:cisco交换机端口限速 / cisco交换机端口镜像 / cisco交换机端口状态

四 : Cisco Application Velocity System帐号口令漏洞

受影响系统:
Cisco Application Velocity System < 5.1.0 不受影响系统:
Cisco Application Velocity System 5.1.0 描述:
Cisco AVS是企业数据中心设备,用于改善web应用性能、衡量终端用户响应时间和管理设备安全性。 Cisco AVS 3110、3120、3180和3180A管理站使用了一些初始配置有默认口令的系统帐号。有漏洞版本的AVS软件在初始配置过程中没有提示管理员更改这些帐号的口令,包括root权限帐号。没有漏洞版本的AVS软件会提示管理员在安装后更改这些帐号。成功利用本文所述的漏洞可能导致完全的管理控制Cisco AVS系统或用户级访问主机操作系统。 厂商补丁:
Cisco已经为此发布了一个安全公告(cisco-sa-20080123-avs)以及相应补丁:
cisco-sa-20080123-avs:Default Passwords in the Application Velocity System
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