(To make a plan for the customer, the first topology is as follows. The core switch 3600 is used as a gateway for each vlan, and the vlan2900 interface address 172.16.0.2/30 is established on the 3600 for interconnection with the internal network port of the firewall. The internal network port address of the firewall is 172.16 .0.1/30, ping172.16.0.1 from the switch has serious packet loss, but ping172.16.0.2 from the switch telnet firewall does not lose packets. The port on the switch side is 10/100/1000 and it is set to be adaptive, and the firewall side is 10/100 and it is set to be adaptive. Both ends are forced to 100 full duplex, which is still the same, but the switch prompts that the port may be damaged and keeps sending wrong packets. Check that the number of connections, traffic, and CPU of the firewall are not high, and the load on the switch is not high. I have been troubled for a long time, and I hope that the experts will help.)
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