Configures the type of adjacency used for an IS-IS interface.
<routing-system xmlns="urn:brocade.com:mgmt:brocade-common-def">
<interface xmlns="urn:brocade.com:mgmt:brocade-interface">
<loopback xmlns="urn:brocade.com:mgmt:brocade-intf-loopback">
<id>{req_val}</id>
<intf-isis xmlns="urn:brocade.com:mgmt:brocade-isis">
<interface-isis>
<circuit-type/>
</interface-isis>
</intf-isis>
</loopback>
</interface>