Good day mixthoor.
Firstly, you should include the switch model and code release version.
For the ERS 4000s, release 5.6, the command to view the binding table is:
show ip dhcp-snooping binding
To add a device to the binding table:
ip dhcp-snooping binding <1-4094> <MAC_addr> [ip <IP_addr>][port <LINE>] [expiry <1-4294967295>]
where
<1-4094> Specifies the ID of the VLAN that the DHCP client is a member of.
expiry <1-4294967295> Specifies the time, in seconds, before the DHCP client binding expires.
ip <IP_addr> Specifies the IP address of the DHCP client.
<MAC_addr> Specifies the MAC address of the DHCP client.
port <LINE> Specifies the switch port that the DHCP client is connected to.
To delete just use "no" in front of the command used to add.
For more information you can check this document:
Configuration — Security Avaya Ethernet Routing Switch 4000 Series
NN47205-505, 08.01