arp topology-change disable
Function
The arp topology-change disable command disables a device from aging or deleting ARP entries in response to network topology changes.
The undo arp topology-change disable command enables a device to age or delete ARP entries in response to network topology changes.
By default, when the network topology changes, ARP entries are aged or deleted.
Usage Guidelines
Usage Scenario
Usually, when a ring protocol detects a network topology change, it will send a protocol packet to notify the ARP module to age or delete ARP entries. Then the device will re-learn ARP entries.
However, if the network topology changes frequently or a device has a large number of ARP entries, re-learning of ARP entries will cause flooding of ARP entries, consuming mass network resources and affecting other services running on the device. To avoid this problem, the arp topology-change disable command can be used to disable a device from aging or deleting ARP entries for network topology changes.
