# ISO Address

## Navigation

Device > Configure > ISIS > Reachable Address > ISO Address

The following information appears:

> Index (ciiRAIndex)

> Admin State (ciiRAAdminState)

> Destination (ciiRAAddrPrefix)

> Mapping Type (ciiRAMapType)

> Metric (ciiRAMetric)

> Metric Type (ciiRAMetricType)

> SNPA Address (ciiRASNPAAddress)

> SNPA Mask (ciiRASNPAMask)

> SNPA Prefix (ciiRASNPAPrefix)

> Type (ciiRAType)

##

### Index (ciiRAIndex)

Identifier for this ciiRAEntry. The value of this object must be unique among all reachable addresses configured on the same parent circuit.

### Admin State (ciiRAAdminState)

Administrative state of the reachable address.

### Destination (ciiRAAddrPrefix)

Destination of this reachable address.

### Mapping Type (ciiRAMapType)

Type of mapping used to determine the SNPA address used in forwarding PDUs for this reachable address prefix.

There are four possible values:

> none: There is no mapping.

> explicit: The subnetwork addresses defined by ciiRASNPAAddress are used.

> extractIDI: The SNPA is embedded in the IDI of the destination NSAP Address. The mapping algorithm extracts the SNPA to be used according to the format and encoding rules defined by ISO8473/Add2. This SNPA extraction algorithm can be used in conjunction with reachable address prefixes from the X.121, F.69, E.163 and E.164 addressing subdomains.

> extractDSP: Either all or a suffix of the SNPA is embedded in the DSP of the destination address. This SNPA extraction algorithm extracts the embedded subnetwork addressing information by performing a logical AND of the ciiRASNPAMask value with the destination address. The part of the SNPA extracted from the destination NSAP is appended to the ciiRASNPAPrefix value to determine the next hop subnetwork addressing information.

### Metric (ciiRAMetric)

Metric value used to reach the specified prefix over this circuit.

### Metric Type (ciiRAMetricType)

Indicates whether the metric is an internal or external metric.

### SNPA Address (ciiRASNPAAddress)

SNPA address a PDU may be forwarded to in order to reach a destination which matches the address prefix of the reachable address.

### SNPA Mask (ciiRASNPAMask)

A bit mask with one bit that indicates the positions in the effective destination address from which embedded SNPA information is to be extracted. For extraction, the first octet of the ciiRASNPAMask value is aligned with the first octet (AFI) of the NSAP address. If the ciiRASNPAMask value and NSAP address are of different lengths, the shorter of the two is logically padded with zeros before performing the extraction.

### SNPA Prefix (ciiRASNPAPrefix)

The fixed SNPA prefix used when the value of ciiRAMapType is extractDSP. The SNPA address used is formed by concatenating the fixed SNPA prefix with a variable SNPA that is extracted from the effective destination address. For reachable address prefixes in which the entire SNPA is embedded in the DSP, there is no SNPA prefix.

### Type (ciiRAType)

Type of Reachable address. There are two possible values:

> manual(1): Created by the network manager.

> automatic(2): Created through the propagation of routing information from another routing protocol.