Hello, all.
When I execute arp -a -n, there are lots of arp caches like below.
Surely, I set netmask and Broadcast without problem and routing table also no
problem.
System is CentOS release 4.7 i386.
I know how to delete the arp cache,
but I don't know why ..
# ifconfig
eth0 Link encap:Ethernet HWaddr 00:A0:D1:E7:91:CC
inet addr:192.168.195.36 Bcast:192.168.195.63 Mask:255.255.255.192
# route -n
192.168.195.0 0.0.0.0 255.255.255.192 U 0 0 0 eth0
0.0.0.0 192.168.195.36 0.0.0.0 UG 0 0 0 eth0
# arp -a -n
? (120.88.46.10) at 00:23:5E:12:63:FE [ether] on eth0
? (208.80.195.54) at 00:23:5E:12:63:FE [ether] on eth0
? (125.122.171.33) at 00:23:5E:12:63:FE [ether] on eth0
? (211.233.26.29) at 00:23:5E:12:63:FE [ether] on eth0
? (111.125.201.75) at 00:23:5E:12:63:FE [ether] on eth0
? (218.24.196.100) at 00:23:5E:12:63:FE [ether] on eth0
? (60.190.216.31) at 00:23:5E:12:63:FE [ether] on eth0
? (72.232.223.58) at 00:23:5E:12:63:FE [ether] on eth0
? (211.39.135.185) at 00:23:5E:12:63:FE [ether] on eth0
? (203.171.229.153) at 00:23:5E:12:63:FE [ether] on eth0
? (121.11.81.217) at 00:23:5E:12:63:FE [ether] on eth0
? (61.110.195.18) at 00:11:43:E0:7D:19 [ether] on eth0
? (61.164.112.5) at 00:23:5E:12:63:FE [ether] on eth0
? (218.66.79.152) at 00:23:5E:12:63:FE [ether] on eth0
? (221.139.48.11) at 00:23:5E:12:63:FE [ether] on eth0
? (211.233.26.12) at 00:23:5E:12:63:FE [ether] on eth0
? (211.137.175.2) at 00:23:5E:12:63:FE [ether] on eth0
? (116.71.174.203) at 00:23:5E:12:63:FE [ether] on eth0
? (72.18.205.157) at 00:23:5E:12:63:FE [ether] on eth0
? (211.39.136.4) at 00:23:5E:12:63:FE [ether] on eth0
? (202.255.47.226) at 00:23:5E:12:63:FE [ether] on eth0
? (211.211.52.134) at 00:23:5E:12:63:FE [ether] on eth0
? (218.61.2.197) at 00:23:5E:12:63:FE [ether] on eth0
? (61.164.151.12) at 00:23:5E:12:63:FE [ether] on eth0
.............
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MontyRee wrote:> > > Hello, all. > > > When I execute arp -a -n, there are lots of arp caches like below. > Surely, I set netmask and Broadcast without problem and routing table also > no problem. > > System is CentOS release 4.7 i386. > > I know how to delete the arp cache, > but I don't know why ..run tcpdump on the interface, to see what is happening on it. nate
MontyRee wrote:> > Hello, all. > > > When I execute arp -a -n, there are lots of arp caches like below. > Surely, I set netmask and Broadcast without problem and routing table also no problem. > > System is CentOS release 4.7 i386. > > I know how to delete the arp cache, > but I don't know why .. > > > # ifconfig > eth0 Link encap:Ethernet HWaddr 00:A0:D1:E7:91:CC > inet addr:192.168.195.36 Bcast:192.168.195.63 Mask:255.255.255.192 > > # route -n > 192.168.195.0 0.0.0.0 255.255.255.192 U 0 0 0 eth0 > 0.0.0.0 192.168.195.36 0.0.0.0 UG 0 0 0 eth0 > > > # arp -a -n > > ? (120.88.46.10) at 00:23:5E:12:63:FE [ether] on eth0 > ? (208.80.195.54) at 00:23:5E:12:63:FE [ether] on eth0 > ? (125.122.171.33) at 00:23:5E:12:63:FE [ether] on eth0 > ? (211.233.26.29) at 00:23:5E:12:63:FE [ether] on eth0 > ? (111.125.201.75) at 00:23:5E:12:63:FE [ether] on eth0 > ? (218.24.196.100) at 00:23:5E:12:63:FE [ether] on eth0 > ? (60.190.216.31) at 00:23:5E:12:63:FE [ether] on eth0 > ? (72.232.223.58) at 00:23:5E:12:63:FE [ether] on eth0 > ? (211.39.135.185) at 00:23:5E:12:63:FE [ether] on eth0 > ? (203.171.229.153) at 00:23:5E:12:63:FE [ether] on eth0 > ? (121.11.81.217) at 00:23:5E:12:63:FE [ether] on eth0 > ? (61.110.195.18) at 00:11:43:E0:7D:19 [ether] on eth0 > ? (61.164.112.5) at 00:23:5E:12:63:FE [ether] on eth0 > ? (218.66.79.152) at 00:23:5E:12:63:FE [ether] on eth0 > ? (221.139.48.11) at 00:23:5E:12:63:FE [ether] on eth0 > ? (211.233.26.12) at 00:23:5E:12:63:FE [ether] on eth0 > ? (211.137.175.2) at 00:23:5E:12:63:FE [ether] on eth0 > ? (116.71.174.203) at 00:23:5E:12:63:FE [ether] on eth0 > ? (72.18.205.157) at 00:23:5E:12:63:FE [ether] on eth0 > ? (211.39.136.4) at 00:23:5E:12:63:FE [ether] on eth0 > ? (202.255.47.226) at 00:23:5E:12:63:FE [ether] on eth0 > ? (211.211.52.134) at 00:23:5E:12:63:FE [ether] on eth0 > ? (218.61.2.197) at 00:23:5E:12:63:FE [ether] on eth0 > ? (61.164.151.12) at 00:23:5E:12:63:FE [ether] on eth0Some other device on the subnet is doing proxy arp. -- Les Mikesell lesmikesell at gmail.com
MontyRee wrote:> # ifconfig > eth0 Link encap:Ethernet HWaddr 00:A0:D1:E7:91:CC > inet addr:192.168.195.36 Bcast:192.168.195.63 Mask:255.255.255.192 > # route -n > 192.168.195.0 0.0.0.0 255.255.255.192 U 0 0 0 eth0 > 0.0.0.0 192.168.195.36 0.0.0.0 UG 0 0 0 eth0your default gateway is not set correctly. the ip address of your nic is set as your default gateway. the default gateway ip address should be your router/modem/whatever. your internet access is working because your gateway is smarter than you are. to the file /etc/sysconfig/network add the line: GATEWAY=192.168.195.xx where 192.168.195.xx is the ip address of your gateway. then: service network restart -- Steven Tardy Systems Programmer Information Technology Infrastructure Information Technology Services Mississippi State University sjt5 at its.msstate.edu