The ARP learning of the dual Nic packet on the linux host is abnormal.

Linux host dual Nic packet sending and receiving ARP learning is not normal-Linux Enterprise Application-Linux server application information, the following is a detailed description. 1. Check that the network has no loops.
2. PING the windows dual-nic host. No problem occurs and it is not related to firewall aging.
3. Capture packets on linux. tcpdump-I eth0 icmp eth0 indicates that the signaling Nic receives ICMP reguest packets.
Tcpdump-I eth1 icmp eth1 indicates that the Service Nic does not have ICMP reply packets
The default route of the netstat-rn host is eth1, so the above 5516 route is sent to the eth0 Nic according to the detailed route, and then the host goes from the default route
Eth1 port return text
Arp-a no gateway address arp table entry on eth1.
4 arp-s gateway IP Gateway MAC address
Create a gateway IP Gateway MAC address file under the ether directory under the/etc/directory.
Create a Startup File ADDARP in rc.5 and execute the command arp-f/etc/ether.
After restart, there will be a static MAC table for the upper-layer gateway device.
When the business recovers, there will be no transient disconnection.