The isis padding-hello command configures an P2P interface to send Hello packets with the padding field after the neighbor relationship is established.
The undo isis padding-hello command restores to the default configuration.
By default, an P2P interface send Hello packets without padding field after the neighbor relationship is established.
Ethernet interface view, Ethernet sub-interface view, Eth-Trunk interface view, Eth-Trunk sub-interface view, Tunnel interface view, Loopback interface view, Dialer interface view, VLANIF interface view, Virtual-Template interface view
The isis padding-hello and isis small-hello commands are mutually exclusive and therefore cannot be configured on the same interface simultaneously.
For the interface that is not configured with the two commands, it sends Hello packets based on the following rules:
For a P2P interface
Before the P2P neighbor relationship is established, the P2P interface sends Hello packets with the padding field.
After the P2P neighbor relationship is established, the P2P interface sends Hello packets without the padding field.
For a broadcast interface
It sends Hello packets with the padding field.