Why Linux is blind to this ARP reply 2973

Thanks prg,

Here are the config-files you ask for, please let me know if I missed something. (NOTE: 10.10.1.54 It's not my laptop, this is the Linux server on my network, it behaves the same way than my vmware linux though, and it is easier for me getting the required info). The routers info is something I don't have access to, It belongs to another company doing a temporal job inside my company.

------------------------------------------------------------------------------------- eth0 Link encap:Ethernet HWaddr 00:50:04:AD:C8:3F inet addr:10.10.1.54 Bcast:10.10.7.255 Mask:255.255.248.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:19287172 errors:0 dropped:0 overruns:0 frame:0 TX packets:167031 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 Interrupt:11 Base address:0x3800 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:15475 errors:0 dropped:0 overruns:0 frame:0 TX packets:15475 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 -----------------------------------------------------end of ifconfig -a ------------------------------------

#netstat -rn

Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 10.10.0.39 10.10.1.54 255.255.255.255 UGH 0 0 0 eth0 10.10.208.0 10.10.1.10 255.255.248.0 UG 0 0 0 eth0 10.10.216.0 10.10.1.10 255.255.248.0 UG 0 0 0 eth0 10.10.0.0 0.0.0.0 255.255.248.0 U 0 0 0 eth0 10.10.96.0 10.10.1.1 255.255.224.0 UG 0 0 0 eth0 168 plus 1.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 0.0.0.0 10.10.1.200 0.0.0.0 UG 0 0 0 eth0 -------------------------------------------------------------------------------------------------------------- Note: As you can see I add the entry to 10.10.0.39, following your advice. #route -n

Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.10.0.39 10.10.1.54 255.255.255.255 UGH 0 0 0 eth0 10.10.208.0 10.10.1.10 255.255.248.0 UG 0 0 0 eth0 10.10.216.0 10.10.1.10 255.255.248.0 UG 0 0 0 eth0 10.10.0.0 0.0.0.0 255.255.248.0 U 0 0 0 eth0 10.10.96.0 10.10.1.1 255.255.224.0 UG 0 0 0 eth0 168 plus 1.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 0.0.0.0 10.10.1.200 0.0.0.0 UG 0 0 0 eth0

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here it is a summary of everything I've found:

1) IT IS NOT a routing issue: Linux box can ping 10.10.0.41, 10.10.0.38, 10.10.0.45, 10.10.0.47, and the rest of the hosts in the network. ....it only happens with 10.10.0.46 and 10.10.0.39, (the two 2210 routers).

2) ARP table is not populated with the router's mac address. Linux is really BLIND to the ARP reply of the routers. When you take a look to the arp table, the entry 10.10.0.46 shows (incomplete).

3) Nothing is blocking the ping to the routers. They respond very well when Windows Hosts ping them in the same subnet than the Linux server

4) the routers are sending the ARP reply to the Linux server. They ignore it, don't know why.

5) The same behaviour of LInux is presented with the SunOS of Netscreen Firewall (version 5 release 8).

Thanks a lot!