You can remove interfaces from an existing target portal group. The specified interfaces are removed from the group and returned to their individual default target portal groups.
Any iSCSI sessions with the interfaces being removed are terminated, but the initiator should reconnect automatically. However, initiators that create a persistent association between the IP address and the target portal group are not able to reconnect.
The following command removes interfaces e8a and e9a from the portal group named server_group, even though there is an iSCSI session currently using e8a: iscsi tpgroup remove -f server_group e8a e9a