Determines the priority of the interface for being elected as a designated IS.
<interface xmlns="urn:brocade.com:mgmt:brocade-interface">
<ethernet>
<name>{req_val}</name>
<interface-eth-isis-conf xmlns="urn:brocade.com:mgmt:brocade-isis">
<intf-isis>
<interface-isis>
<interface-priority/>
</interface-isis>
</intf-isis>
</interface-eth-isis-conf>
</ethernet>
</interface>