# AMF Configuration

AMF configuration files includes:

- amf/amf1/config/amf.conf 
- amf/amf1/xml/amfInfo.xml 
- amf/amf1/xml/udm-am-subscription-data.xml
- amf/amf1/xml/udm-smf-selection.xml
- amf/amf1/xml/udm-ue.xml
- amf/amf1/xml/nrf.xml

## amf.conf

```xml
<?xml version="1.0" encoding="UTF-8"?>
<ngc>
    <fwcfg local-http-service-ip="0.0.0.0"
           local-http-service-port="5001" />
	
    <!--AMFCfgComponent:
        amf-name: The name of the AMF node.
    -->
    <amfcfg amf-name="amf1.uranus.amf.5gc.mnc092.mcc466.3gppnetwork.org"
            mico-support-indication="0"
            t3512="60"
            t3502="30"
            amf-apiroot=""
            unreachable-timer="20"
            implicit-deregister-timer="300"
            amf-capacity="100"
            amf-info-profile="./xml/amfInfo.xml"
            default-paging-profile-id="1"
            paging-policy-profile="./xml/paging-policy.xml" />
	
    <!--NGAPComponent-Interface beteen AMF and RAN
     -->
    <ngap sctp-server-ip="192.168.20.52"
          sctp-server-port="38412" />
	
    <!--N11Component-Interface between AMF and SMF
     -->
    <n11 N11-http2-server-ip="192.168.110.52"
         N11-http2-server-port="81"
         N11-http2-client-ip="192.168.110.52"
         N11-http2-client-port="8011"
         smf-apiroot="" />
	
    <!--N12Component-Interface between AMF and AUSF
     -->
    <n12 auth-enabled="1"
         cipher-alg-order="0,1,2,3"
         integrity-alg-order="2,3,0,1"
         N12-http2-client-ip="192.168.120.52"
         N12-http2-client-port="8012"
         ausf-apiroot="" />
	
    <!--N8Component-Interface between AMF and UDM
     -->
    <n8 local-subscription-enabled="0"
        udm-am-profile="./xml/udm-am-subscription-data.xml"
        udm-smf-sel-profile="./xml/udm-smf-selection.xml"
        udm-ue-profile="./xml/udm-ue.xml"
        N8-http2-server-ip="192.168.80.52"
        N8-http2-server-port="88"
        N8-http2-client-ip="192.168.80.52"
        N8-http2-client-port="8008"
        udm-apiroot="" />
	
    <!--N15Component-Interface between AMF and PCF
     -->
    <n15 local-policy-enabled="1"
         pcf-am-profile="./xml/pcf-am-policy-data.xml"
         pcf-ue-profile="./xml/pcf-ue.xml"
         N15-http2-server-ip="192.168.150.52"
         N15-http2-server-port="85"
         N15-http2-client-ip="192.168.150.52"
         N15-http2-client-port="8015"
         pcf-apiroot="" />
	
    <!--NRFComponent-Interface between AMF and NRF
        nf-selection-mode: only support 0.
     -->
    <nrf nf-selection-mode="0"
         nf-sel-profile="./xml/nrf.xml"
         nrf-priority="1"
         nrf-capacity="200"
         nrf-heartBeat-Interval="20"
         nrf-http2-server-ip="192.168.120.33"
         nrf-http2-server-port="8001"
         nrf-http2-client-ip="192.168.120.33"
         nrf-http2-client-port="8009"
         nrf-apiroot="" />
	
    <!--N22Component-Interface between AMF and NSSF
     -->
    <n22 local-NSSF-enabled="1"
         N22-http2-server-ip="192.168.120.28"
         N22-http2-server-port="8012"
         N22-http2-client-ip="192.168.120.28"
         N22-http2-client-port="8009"
         nssf-apiroot="" />
</ngc>
```

### AMF Name

- default value is: `amf1.uranus.5gc.mnc092.mcc466.3gppnetwork.org`

### Enable AUSF and Security Flag

- auth-enabled: default value is “0”, AUSF and security are not supported. 如果不启用 AUSF，则使用 AMF 本地的 AUSF 相关配置文件。

### Embedded UDM Flag

- local-subscription-enabled: default value is “1”, local configuration is used. 如果不启用 UDM，则使用 AMF 本地的 UDM 相关配置文件。

#### Subscriber Profile

In the case of embedded UDM configured, user subscription information is configured in **udm-smf-selecton.xml, udm-am-subcription-data.xml** and **udm-ue.xml**.

### Embedded NRF Flag

- nf-selection-mode: default value is “0”, local configuration is used. 如果不启用 NRF，则使用 AMF 本地的 NRF 相关配置文件。

#### SMF Selection

In the case of embedded NRF configured, SMF is selected via the configuration in **udm-ue.xml**, **udm-smf-selection.xml** and **nrf.xml**. 

- List of the subscribed DNNs for the UE is configured in the file **udm-ue.xml** and **udm-smf-selection.xml.** 
- And the IP address and port of SMF are configured in the file **nrf.xml**.

### Embedded PCF Flag

- local-policy-enabled: default value is “1”, local configuration is used. 如果不启用 PCF，则使用 AMF 本地的 PCF 相关配置文件 pcf-am-policy-data.xml 和 pcf-ue.xml。否则使用 PCF 的 am-policy-data.xml 配置文件。

### Timer 3512

- t3512: default value is set to 60 seconds.

### Unreachable Timer

- unreachable-timer: default value is added 4 minutes based on t3512.

### Implicit Deregister Timer

- implicit-deregister-timer: default value is set to 300 minutes.

### AMF Capacity

- amf-capacity: default value is set to 100.

### N2 Interface (NG-AP) 

- SCTP Server IP: local IP address.
- SCTP Server Port: local port, default 38412.

### N8 Interface (HTTP2)

- N8 HTTP2 Server IP: local IP address.
- N8 HTTP2 Server Port: local port, default 88.
- N8 HTTP2 Client IP: local IP address.
- N8 HTTP2 Client Port: local port, default 8008.
- UDM HTTP2 Server IP: remote IP address.
- UDM HTTP2 Server Port: remote port, default 3123.

### N11 Interface (HTTP2) 

- HTTP2 Server IP: local IP address.
- HTTP2 Server Port: local port, default 81.
- HTTP2 Client IP: local IP address.
- HTTP2 Client Port: local port, default 8011.
- SMF HTTP2 Server IP: remote IP address.
- SMF HTTP2 Server Port: remote port, default 80.

### N12 Interface (HTTP2)

- N12 HTTP2 Client IP: local IP address.
- N12 HTTP2 Client Port: local port, default 8012.
- AUSF HTTP2 Server IP: remote IP address.
- AUSF HTTP2 Server Port: remote port, default 2133.

### N15 Interface (HTTP2)

- N15 HTTP2 Server IP: local IP address.
- N15 HTTP2 Server Port: local port, default 85.
- N15 HTTP2 Client IP: local IP address.
- N15 HTTP2 Client Port: local port, default 8015.
- PCF HTTP2 Server IP: remote IP address.
- PCF HTTP2 Server Port: remote port, default 3123.

### Nnrf Interface (HTTP2)

- NRF HTTP2 Server IP: local IP address.
- NRF HTTP2 Server Port: local port, default 8001.
- HTTP2 Client IP: local IP address.
- HTTP2 Client Port: local port, default 8009.

## amfInfo.xml

```xml
<?xml version="1.0" encoding="utf-8"?>
<amfInfo-profiles>
    <amfInfo-profile name="amfInfo-profile" size="1">
        <!--Guami : mcc(3digtis) + mnc(2digits) + reginId(8bits,0-255) + setId(10bits, 0-1023 ) + point(6bits, 0-63), in decimal)-->
        <amfInfo-entry guami-index="1" mcc="466" mnc="92" regionId="1" setId="1" pointer="1">
            <snssai-list-entry snssai-list-size="3">
                <snssai-entry index="uRLLC" snssai-sst="1" snssai-sd=""/>
                <snssai-entry index="eMMB" snssai-sst="2" snssai-sd=""/>
                <snssai-entry index="mMTC" snssai-sst="3" snssai-sd=""/>
            </snssai-list-entry>
            <tac-list-entry tac-list-size="6">
                <tac-entry tac="80" snssai-index-list=""/>
                <tac-entry tac="81" snssai-index-list="eMMB,uRLLC,mMTC"/>
                <tac-entry tac="82" snssai-index-list="eMMB,uRLLC,mMTC"/>
                <tac-entry tac="83" snssai-index-list=""/>
                <tac-entry tac="84" snssai-index-list="eMMB,uRLLC,mMTC"/>
                <tac-entry tac="85" snssai-index-list="eMMB,uRLLC,mMTC"/>
            </tac-list-entry>
            <tracking-area-list-entry list-size="2">
                <tac-list-entry index="1" tac-list="80,81,82"/>
                <tac-list-entry index="2" tac-list="83,84,85"/>
            </tracking-area-list-entry>
        </amfInfo-entry>
    </amfInfo-profile>
</amfInfo-profiles>
```

### Globally Unique AMF Identifier (GUAMI)

default value is:

- MCC (466)
- MNC (92)
- AMF Region ID (1111)
- AMF Set ID (11)
- AMF Pointer (12)

### AMF Supported Information

default value is:

- SNSSAI (SST=1, SD=null)
- TAC (80, 81, 82, 83, 84, 85)
- TAC-List 1 (80, 82, 82)
- TAC-List 2 (83, 84, 85)

## paging-policy.xml

```xml
<?xml version="1.0" encoding="UTF-8"?>
<paging-profiles>
    <!--
        id:  This id is an index, pointed to which paging profile should be used, it's configured in amf.conf (default-paging-profile-id).
        paging-strategy: 1     Based on last-visited TA to page UE.
                         2     Based on recent serverd RAN to page UE.
                         3     Based on all RAN(s) in AMF supported tracking area to page UE.
                         4     Based on neighbour RAN to page UE, not support for this version.
        paging-interfal: timer to retransmission paging messages.
     -->
    <paging-policy-profile name="paging-policy-proflie" size="6">
        <paging-profile id="1" paging-strategy="1" paging-interval="0" />
        <paging-profile id="2" paging-strategy="2" paging-interval="0" />
        <paging-profile id="3" paging-strategy="3" paging-interval="0" />
        <paging-profile id="4" paging-strategy="1,1" paging-interval="1" />
        <paging-profile id="5" paging-strategy="2,3" paging-interval="1" />
        <paging-profile id="6" paging-strategy="3,3,3" paging-interval="2" />
     </paging-policy-profile>
</paging-profiles>
```

## nrf.xml

```xml
<?xml version="1.0" encoding="utf-8"?>
<nf-selection-profiles>
    <nf-selection-profile mcc="466" mnc="92" size="6">
        <nf-entry nf-type="smf" snssai-sst="1" snssai-sd="" serving-area="string" dnn="default" nf-ip="192.168.110.53" port="3123"/>
        <nf-entry nf-type="smf" snssai-sst="2" snssai-sd="" serving-area="string" dnn="public" nf-ip="192.168.110.53" port="3123"/>
        <nf-entry nf-type="smf" snssai-sst="3" snssai-sd="" serving-area="string" dnn="private" nf-ip="192.168.110.53" port="3123"/>
        <nf-entry nf-type="ausf" nf-ip="192.168.120.55" port="2133"/>
        <nf-entry nf-type="udm" nf-ip="192.168.80.56" port="3123"/>
        <nf-entry nf-type="pcf" nf-ip="192.168.150.54" port="7080"/>
    </nf-selection-profile>
</nf-selection-profiles>
```

## pcf-am-policy-data.xml

```xml
<?xml version="1.0" encoding="UTF-8"?>
<pcf-profiles>
    <am-policy size="2">
        <am-policy-entry index="1" rfsp-index="123" service-area-type="allowed" max-allowed-tais="12" tai-size="2">
            <tai-entry tai-mcc="466" tai-mnc="92" tai-tac="11"/>
            <tai-entry tai-mcc="466" tai-mnc="92" tai-tac="12"/>
        </am-policy-entry>
        <am-policy-entry index="2" rfsp-index="123" service-area-type="non-allowed" tai-size="2">
            <tai-entry tai-mcc="466" tai-mnc="92" tai-tac="11"/>
            <tai-entry tai-mcc="466" tai-mnc="92" tai-tac="12"/>
        </am-policy-entry>
    </am-policy>
</pcf-profiles>
```

## pcf-ue.xml

```xml
<?xml version="1.0" encoding="UTF-8"?>
<pcf-profiles>
    <user-list size="2">
        <ue-policy-data ue-supi="466920100001101" am-policy-index="1" />
        <ue-policy-data ue-supi="466920100001102" am-policy-index="1" />
        <ue-policy-data ue-supi="466920100001103" am-policy-index="1" />
    </user-list>
</pcf-profiles>
```

## TS

问题 1：SNSSAI 匹配失败。

```
UID466920100001101 validateDnnAndSnssai...
UID466920100001101 S-NSSAI is not requested by UE.
UID466920100001101 getting the 0 allowed snssai
UID466920100001101 System default S-NSSAI: 1ffffff
UID466920100001101 Compare Snssai. Snssai: 1ffffff, subscribedSnssai: 1ffffff
UID466920100001101 DNN is requested by UE. Compare Dnn. Dnn: private, subscribedDnn: default
UID466920100001101 UE requested DNN mismatches with the subscription data.
UID466920100001101 Compare Snssai. Snssai: 1ffffff, subscribedSnssai: 3ffffff
UID466920100001101 Snssai mismatch! Try next one...
UID466920100001101 Failed to validate DNN and Snssai !!!
```

诊断：AMF 需要 amfInfo.xml `<snssai-list-entry>` 支持指定 SNSSAI。

问题 2：

```bash
UID466920100001101 S-NSSAI is not requested by UE.
UID466920100001101 allowedSnssaiList size is zeros
UID466920100001101 Failed to validate DNN and Snssai !!!
```

诊断：UE 请求的或 UE 在 UDM 上签约的 SNSSAI 没有配置在 AMF 中。

场景 1：AMF amfInfo.xml 没有配置相应的 SNSSAI。

场景 2：gNB 与 AMF 可用 SNSSAI 的交集不符合 UE 请求的要求。例如：NG Setup 带上来的 RAN Support SNSSAI 是 sst=1 和 sst=2，通过和 AMF 本地配置求交集算出 Available SNSSAI List 也是 sst=1 和 sst=2。但 UE Requested SNSSAI 是 sst=3。这时候 UE Request  SNSSAI 不在 Avalable 的范围内，所以需要使用 UDM 分配的 SNSSAI，但 UDM 配置的 default-snssai-list 也是 sst=3，也不在 RAN Support SNSSAI 的范围内，所以会导致无法分配默认的 allowed snssai。

解决方法 1：gNB 配置 sst=3.

解决方法 2：修改 UDM 的 default-snssai-list 和 smfSelction，都改为符合范围的 sst=1 或者 sst=2。

问题 3：UE 没有上下行。

```
UID466920100001101 DNN is requested by UE. Compare Dnn. Dnn: ims, subscribedDnn: default
UID466920100001101 UE requested DNN mismatches with the subscription data.
UID466920100001101 Failed to validate DNN and Snssai !!!
```

诊断：打开 UE 网络设置的 “移动数据” 选项。