The ARP entry is
updated before the ARP aging time expires. Generally, this situation occurs due
to update of TC BPDUs, but the number of received TC BPDUs is small.
It is recommended
that static ARP be configured. The problem persists when static ARP is configured.
Through remote check, it is found that the MAC address of the peer end is
learned in VLAN 1. Because DHCP is configured in VLAN 1 on the S2700, DHCP
packets in VLAN 1 are sent. As a result, the MAC address of the S5700 is
incorrect. Delete the command to solve the problem:
ip address dhcp-alloc