一、通过IP查端口 先查Mac地址，再根据Mac地址查端口：bangonglou3#show arp | include 208.41 或者show mac-address-table 来查看整个端口的ip-mac表 Internet 10.138.208.41 4 0006.1bde.3de9 ARPA Vlan10 bangonglou3#show mac-add | in 0006.1bde 10 0006.1bde.3de9 DYNAMIC Fa0/17...
By figuring that process out, you'll see why a Cisco-router will display the first and even the second ping as failed before the ARP-table has been populated correctly. It should be enough to get you on the right track, but just let me know if you need some hints. -HTH Daniel Expan...
注意如上图,源IP地址为主机D的IP地址,但是源MAC地址是router e0口的MAC地址.这就是发送给主机A的proxy ARP应答(代理人,中间人).这样的proxy ARP应答一般是作为unicast发送给请求者(主机A) 主机A收到这个proxy ARP应答以后,开始更新自己的ARP table,如下图: 此主题相关图片如下: 于是从现在开始,主机A将不把要...
/*这样可以静态ip和MAC一个绑定 switch(config)#ip DHCP snooping database tftp:// 10.1.1.1/DHCP_table /*因为掉电后,这张绑定表就消失了,所以要选择一个保存的地方,ftp,tftp,flash皆可。本例中的DHCP_table是文件名,而不是文件夹,同时文件名要手工创建一个 2. ARP inspection 1.介绍 DAI是以DHCP-snoo...
I have performed a clear ip arp <IP address> command, and you can see that the ARP table updates with the new MAC address. Hardware switch: Cisco C9300Software version: 17.6.5 Does anyone have any idea why this could be happening and how to resolve it? I have this problem too ...
回来报告一下情况: 1. mac 修改老化时间设置:mac address-table aging-time 0 vlan 32 2. 4507上面设置arp表不老化设置:interface vlan 32 、arp timeout 0 结果:循环pingvlan-32的所有终端IP,暂未发现离线情况,感谢解惑。 5 有帮助 回复 yangpiguan Level 1 发布时间 04-24-2024 11:36 PM 和...
R5#clear arp-cache 绑定MAC地址: R5(config)#arp 172.31.1.2 cc15.2cec.0000 arpa R5(config)#no arp 172.31.1.2 cc15.2cec.0000 ARPA 查看MAC地址表: J1#sh mac-address-table Destination Address Address Type VLAN Destination Port --- --- --- --- c010.2bfc.0000 Self 1 Vlan1 0050.56c0.0008...
proxy ARP带来的哪些负面影响? 1.增加了某一网段上ARP流量 2.主机需要更大的ARP table来处理IP地址到MAC地址的映射 3.安全问题,比如ARP欺骗(spoofing) 4.不会为不使用ARP来解析地址的网络工作 5.不能够概括和推广网络拓扑 一些参考资料:RFC 925和RFC 1027 Fin...
I am having a problem with "Incomplete MAC" address in my ARP table in Cisco Packet Tracer.I have no idea what caused it because it worked just fine last week. I am using DHCP on sub-interface on VLAN 4 for my Student PCs, the issue is not DHCP server, its ready to send out DHC...
On the FW the ARP Table only shows 172.16.2.1 and 172.16.2.2. Is this all it will ever be as they are 2 devices, different networks, or should I be able to, from FW, be able to see all devices that the SG seems via its ARP? I have this problem too Labels: LAN Switching...