Sequence number of the rule within the ARP ACL. A value of 0 is special in that it is used to automatically assign the next higher available rule sequence number, after the last one in the given ARP ACL. In other words, a row is created at the end of the current table with a suitable value for the agentArpAclRuleConfigIndex object if a value of 0 was used during rule creation. The value of 0 can only be used while creating a new row in the table, and cannot be used in SET or GET operations. A value of 0 in a GET-NEXT operation will retrieve the sequence number of the first rule. The value of this object is not persistent across reboots. Upon a reboot of the management agent, the rules are assigned new sequence numbers while maintaining the rule order within the table.