排除因ims授权失败断开原因增加而导致的Gx成功率KPI降级故障
下载选项
已更新: 2020 年 1 月 7 日
文档 ID:215137
非歧视性语言
此产品的文档集力求使用非歧视性语言。在本文档集中，非歧视性语言是指不隐含针对年龄、残障、性别、种族身份、族群身份、性取向、社会经济地位和交叉性的歧视的语言。由于产品软件的用户界面中使用的硬编码语言、基于 RFP 文档使用的语言或引用的第三方产品使用的语言，文档中可能无法确保完全使用非歧视性语言。 深入了解思科如何使用包容性语言。
关于此翻译
思科采用人工翻译与机器翻译相结合的方式将此文档翻译成不同语言，希望全球的用户都能通过各自的语言得到支持性的内容。 请注意：即使是最好的机器翻译，其准确度也不及专业翻译人员的水平。 Cisco Systems, Inc. 对于翻译的准确性不承担任何责任，并建议您总是参考英文原始文档（已提供链接）。
简介
本文档介绍如何排除当“ims-authorization-failed”断开原因增加时发生Gx成功率关键绩效指标(KPI)降级时发生的问题。
先决条件
要求
Cisco 建议您了解以下主题：
- 5000/5500的硬件知识
- StarOS
使用的组件
本文档不限于特定的软件和硬件版本。
本文档中的信息都是基于特定实验室环境中的设备编写的。
本文档中使用的所有设备最初均采用原始（默认）配置。如果您的网络处于活动状态，请确保您了解所有命令的潜在影响。
背景信息
缩写：
| PCRF | 策略和计费规则功能 |
| PGW | 数据包数据网络网关 |
| CCR | 信用控制请求 |
| CCA | 信用控制答案 |
| CFC | 控制功能虚拟卡 |
| FC | 服务功能虚拟卡 |
| KPI | 关键绩效指标(KPI) |
问题
服务提供商报告一个PGW中Gx成功率KPI降级，并且发现断开原因“ims-authorization-failed”计数器正在增加。
此处，“ims-authorization-failed”断开原因描述了由于IMS授权失败而断开的会话总数。
PGW不断报告“ims-authorization-failed”计数器。根据disconnect-reasons统计信息，“ims-authorization-failed”计数器导致Gx成功率降低。
1st iteration-
[local]PGW# show session disconnect-reasons verbose | grep -i ims-authorization-failed
Thursday June 13 16:10:39 NZST 2019
..
Disconnect Reason Num Disc Percentage
----------------------------------------------------- ---------- ----------
ims-authorization-failed 59034 1.68225
2nd iteration-
[local]PGW# show session disconnect-reasons verbose | grep -i ims-authorization-failed
Thursday June 13 16:10:59 NZST 2019
..
Disconnect Reason Num Disc Percentage
----------------------------------------------------- ---------- ----------
ims-authorization-failed 59202 1.68181 >>168 counter increased in just 20 sec of span
故障排除
本部分提供信息，用于排除由于“ims-authorization-failed”断开原因增加而导致Gx成功率KPI降级的问题。
已为故障场景收集监控用户跟踪。
从分析中发现，对于与卡7关联的sessmgr实例，观察到“ims-authorization-failed”。总的来说，ims-authorization-failed原因是在断开连接原因中收到的。
请参阅故障用户跟踪序列：
CREATE_SESSION_REQUEST消息从SGW发送到PGW。
INBOUND>>>>> From sessmgr:102 sessmgr_pgw.c:31631 (Callid 1e283e66) 16:55:07:562 Eventid:141004(3)
[PGW-S5/S2a/S2b]GTPv2C Rx PDU, from 202.73.X.Y:31552 to 202.73.A.B:2123 (262)
TEID: 0x00000000, Message type: EGTP_CREATE_SESSION_REQUEST (0x20)
Sequence Number: 0x18A861 (1615969)
GTP HEADER
Version number: 2
TEID flag: Present
Piggybacking flag: Not present
Message Length: 0x0102 (258)
INFORMATION ELEMENTS
IMSI:
Type: 1 Length: 8 Inst: 0
Value: ABXY01106562064
USER LOCATION INFO:
Type: 86 Length: 13 Inst: 0
Value:
Location type: TAI
MCC: 530
MNC: 01
TAC: 0xA101
Location type: ECGI
MCC: AB0
MNC: XY
ECI: 0x006F902
SERVING NETWORK:
Type: 83 Length: 3 Inst: 0
Value:
MCC: AB0
MNC: XY
RADIO ACCESS TECH:
Type: 82 Length: 1 Inst: 0
Value: EUTRAN (6)
SGW-CONTROL FTEID:
Type: 87 Length: 9 Inst: 0
Value:
Interface: SGW S5/S8-C
IPv4 Flag: 1
IPv6 Flag: 0
Teid: 0x84B8A061
IPV4 Addr: 202.73.X.Y
ACCESS POINT NAME:
Type: 71 Length: 28 Inst: 0
Value: internet.mnc0XY.mcc0AB.gprs
SELECTION MODE:
Type: 128 Length: 1 Inst: 0
Value: MS or network provided APN,subscr verified (0x00)
PDN TYPE:
Type: 99 Length: 1 Inst: 0
Value: IPV4
PDN ADDRESS ALLOC:
Type: 79 Length: 5 Inst: 0
Value:
PDN Type: IPV4
IPV4 Addr: 0.0.0.0
INDICATION:
Type: 77 Length: 6 Inst: 0
Value:
DAF : 0
DTF : 0(Direct tunnel disabled)
HI : 0
DFI : 0
OI : 0
ISRSI: 0(ISR not supported)
ISRAI: 0(ISR not Activated)
SGWCI: 0
SQCI : 0
UIMSI: 0(Authenticated IMSI)
CFSI : 0(F-TEID Change Indication not supported)
CRSI : 0(Location Change Reporting not supported)
PS : 1(Piggybacking feature supported)
PT : 0(GTPv2)
SI : 0
MSV : 0
RetLoc: 0
PBIC: 0
SRNI: 0
S6AF: 0
S4AF: 0
MBMDT: 0
ISRAU: 0
CCRSI: 0(CSG Information Change Reporting mechanism not supported )
CPRAI: 0
ARRL: 0
PPOF: 0
PPON / PPEI: 0
PPSI: 0
CSFBI: 0
CLII: 0
CPSR: 0
UASI: 0
DTCI: 0
BDWI: 0
PCRI: 0
AOSI: 0
AOPI: 0
EPCOSI: 0
CPOPCI: 0
S11TF: 0
PNSI: 0
WPMSI: 0
APN RESTRICTION:
Type: 127 Length: 1 Inst: 0
Value: 0
AGGREGATE MAX BIT RATE:
Type: 72 Length: 8 Inst: 0
Value:
Uplk AMBR: 64000 kbps
Dnlk AMBR: 256000 kbps
PCO:
Type: 78 Length: 32 Inst: 0
Container id: 0x8021 (IPCP)
Container length: 0x10 (16)
Container content:
Conf-Req(0), Pri-DNS=0.0.0.0, Sec-DNS=0.0.0.0
Container id: 0x000D (IPv4-DNS-Server)
Container length: 0x00 (0)
Container content:
DNS Address: Request for IPv4 DNS Address allocation
Container id: 0x000A (IP address allocation via NAS signalling)
Container length: 0x00 (0)
Container content:
IP Address allocation via NAS signalling
Container id: 0x0005 (Bearer Control Mode)
Container length: 0x00 (0)
Container content:
NCQOS BCM Indicator:
Container id: 0x0010 (Link MTU)
Container length: 0x00 (0)
Container content:
BEARER CONTEXT TO BE CREATED:
Type: 93 Length: 44 Inst: 0
Value:
EPS BEARER ID:
Type: 73 Length: 1 Inst: 0
Value: 5
SGW-DATA FTEID:
Type: 87 Length: 9 Inst: 2
Value:
Interface: SGW S5/S8-U
IPv4 Flag: 1
IPv6 Flag: 0
Teid: 0x8A948061
IPV4 Addr: 202.73.X.Y
BEARER QOS:
Type: 80 Length: 22 Inst: 0
Value:
ARP: PCI = 1 (Disabled), PL = 9, PVI = 0 (Enabled)
QCI: 6
Uplnk MBR: 0 kbps
Dnlnk MBR: 0 kbps
Uplnk GBR: 0 kbps
Dnlnk GBR: 0 kbps
UE TIME ZONE:
Type: 114 Length: 2 Inst: 0
Value:
TZ: +12:00
DST: +0 hour
CHARGING CHAR:
Type: 95 Length: 2 Inst: 0
Value: 0x0800
<additional output suprresed>
PGW在EGTP_CREATE_SESSION_RESPONSE消息中向SGW发送“No resource available”。
<<<<OUTBOUND From sessmgr:102 sessmgr_egtp.c:2906 (Callid 1e283e66) 16:55:15:492 Eventid:141005(3)
[PGW-S5/S2a/S2b]GTPv2C Tx PDU, from 202.73.195.91:2123 to 202.73.195.89:31552 (33)
TEID: 0x84B8A061, Message type: EGTP_CREATE_SESSION_RESPONSE (0x21)
Sequence Number: 0x18A861 (1615969)
GTP HEADER
Version number: 2
TEID flag: Present
Piggybacking flag: Not present
Message Length: 0x001D (29)
INFORMATION ELEMENTS
CAUSE:
Type: 2 Length: 2 Inst: 0
Value:
Cause: EGTP_CAUSE_NO_RESOURCES_AVAILABLE (0x49)
PCE: 0
BCE: 0
CS: 0
BEARER CONTEXT CREATED:
Type: 93 Length: 11 Inst: 0
Value:
EPS BEARER ID:
Type: 73 Length: 1 Inst: 0
Value: 5
CAUSE:
Type: 2 Length: 2 Inst: 0
Value:
Cause: EGTP_CAUSE_NO_RESOURCES_AVAILABLE (0x49)
PCE: 0
BCE: 0
CS: 0
总的来说，ims-authorization-failed reason在断开连接原因中收到。
***CONTROL*** From sessmgr:102 sessmgr_func.c:5311 (Callid 1e283e66) 16:55:15:493 Eventid:10285 >>disconnect received for sessmr 102
CALL STATS: <xyz12591615@internet>, msid <ABXY01106562064>, Call-Duration(sec): 0
input pkts: 0 output pkts: 0
input bytes: 0 output bytes: 0
input bytes dropped: 0 output bytes dropped: 0
input pkts dropped: 0 output pkts dropped: 0
pk rate from user(bps): 0 pk rate to user(bps): 0
ave rate from user(bps): 0 ave rate to user(bps): 0
sust rate from user(bps): 0 sust rate to user(bps): 0
pk rate from user(pps): 0 pk rate to user(pps): 0
ave rate from user(pps): 0 ave rate to user(pps): 0
sust rate from user(pps): 0 sust rate to user(pps): 0
link online/active percent: 0
ipv4 bad hdr: 0 ipv4 ttl exceeded: 0
ipv4 fragments sent: 0 ipv4 could not fragment: 0
ipv4 input acl drop: 0 ipv4 output acl drop: 0
ipv4 bad length trim: 0
ipv4 input non-mip drop: 0 ipv4 output non-mip drop: 0
ipv4 input css drop: 0 ipv4 output css drop: 0
output gre xoff pkts drop: 0 output gre xoff bytes drop: 0
ipv4 output no-flow drop: 0
ipv4 source violations: 0 ipv4 early pdu drop: 0
ipv4 proxy-dns redirect: 0 ipv4 proxy-dns pass-thru: 0
ipv4 proxy-dns drop: 0 ipv4 proxy-dns redirect tcp connection: 0
ipv6 bad hdr: 0 ipv6 bad length trim: 0
ip source violation no acct: 0 ip source violation ignored: 0
dlnk pkts exceeded bw: 0 dlnk pkts violated bw: 0
uplnk pkts exceeded bw: 0 uplnk pkts violated bw: 0
dormancy total: 0 handoff total: 0
Disconnect Reason: ims-authorization-failed
Last Progress State: IMS Authorizing
此外，sessmgr实例编号是102，它与收到ims-authorization-failed计数器的卡7关联。
[local]PGW# show task resources facility sessmgr instance 102
Thursday June 13 16:56:14 NZST 2019
task cputime memory files sessions
cpu facility inst used allc used alloc used allc used allc S status
----------------------- ----------- ------------- --------- ------------- ------
7/0 sessmgr 102 8.80% 100% 792.2M 2.34G 45 500 3097 32504 I good
Total 1 8.80% 792.2M 45 3097
检查配置后，发现多个diamproxy配置正常。
[local]PGW# show config | grep multiple
Thursday June 13 15:15:11 NZST 2019
require diameter-proxy multiple
然后发现，在Diamproxy设备未产生的卡上观察到“ims-authorization-failed”。
在本例中，Diamproxy设施未随卡7产生。
[local]PGW# show card table
Thursday June 13 14:53:53 NZST 2019
Slot Card Type Oper State SPOF Attach
----------- -------------------------------------- ------------- ---- ------
1: CFC Control Function Virtual Card Standby -
2: CFC Control Function Virtual Card Active No
3: FC 2-Port Service Function Virtual Card Active No
4: FC 2-Port Service Function Virtual Card Active No
5: FC 2-Port Service Function Virtual Card Active No
6: FC 2-Port Service Function Virtual Card Active No
7: FC 2-Port Service Function Virtual Card Active No
8: FC 2-Port Service Function Virtual Card Active No
9: FC 2-Port Service Function Virtual Card Active No
10: FC 2-Port Service Function Virtual Card Active No
11: FC 2-Port Service Function Virtual Card Active No
12: FC 2-Port Service Function Virtual Card Active No
13: FC 2-Port Service Function Virtual Card Active No
14: FC 2-Port Service Function Virtual Card Active No
15: FC 2-Port Service Function Virtual Card Standby -
16: FC 2-Port Service Function Virtual Card Active No
------- -
[local]PGW# show task resources facility diamproxy all
Thursday June 13 14:55:31 NZST 2019
task cputime memory files sessions
cpu facility inst used allc used alloc used allc used allc S status
----------------------- ----------- ------------- --------- ------------- ------
3/0 diamproxy 8 1.10% 90% 43.75M 250.0M 271 2500 -- -- - good
4/0 diamproxy 9 1.09% 90% 43.89M 250.0M 266 2500 -- -- - good
5/0 diamproxy 10 1.09% 90% 43.93M 250.0M 237 2500 -- -- - good
9/0 diamproxy 1 1.08% 90% 43.63M 250.0M 212 2500 -- -- - good
10/0 diamproxy 4 1.08% 90% 43.88M 250.0M 258 2500 -- -- - good
12/0 diamproxy 11 1.11% 90% 43.93M 250.0M 229 2500 -- -- - good
13/0 diamproxy 2 1.09% 90% 43.75M 250.0M 258 2500 -- -- - good
14/0 diamproxy 7 1.06% 90% 43.88M 250.0M 256 2500 -- -- - good
16/0 diamproxy 13 1.04% 90% 43.89M 250.0M 199 2500 -- -- - good
解决方案
发现虽然卡7处于活动状态，但卡7没有生成Diamproxy设备。要生成diamproxy设备，需要重新启动diamctrl设备或执行CF卡切换。
该行动计划按建议执行。
切换活动CFC卡和备用CFC卡。
在卡切换后，各个DiamProxy已正确生成，并且Gx KPI已按照预期值恢复正常。
******** show card table all *******
Thursday June 13 22:17:54 NZST 2019<tel:2019>
Slot Card Type Oper State SPOF Attach
----------- -------------------------------------- ------------- ---- ------
1: CFC Control Function Virtual Card Active No >>CFC card 1 active post switchover
2: CFC Control Function Virtual Card Standby -
3: FC 2-Port Service Function Virtual Card Active No
4: FC 2-Port Service Function Virtual Card Active No
5: FC 2-Port Service Function Virtual Card Active No
6: FC 2-Port Service Function Virtual Card Active No
7: FC 2-Port Service Function Virtual Card Active No
8: FC 2-Port Service Function Virtual Card Active No
9: FC 2-Port Service Function Virtual Card Active No
10: FC 2-Port Service Function Virtual Card Active No
11: FC 2-Port Service Function Virtual Card Active No
12: FC 2-Port Service Function Virtual Card Active No
13: FC 2-Port Service Function Virtual Card Active No
14: FC 2-Port Service Function Virtual Card Active No
15: FC 2-Port Service Function Virtual Card Standby -
16: FC 2-Port Service Function Virtual Card Active No
--------- -
[local]PGW# show task resources facility diamproxy all
Thursday June 13 14:55:31 NZST 2019
task cputime memory files sessions
cpu facility inst used allc used alloc used allc used allc S status
----------------------- ----------- ------------- --------- ------------- ------
3/0 diamproxy 8 0.95% 90% 43.86M 250.0M 130 2500 -- -- - good
4/0 diamproxy 9 0.98% 90% 44.00M 250.0M 130 2500 -- -- - good
5/0 diamproxy 10 1.00% 90% 44.00M 250.0M 135 2500 -- -- - good
7/0 diamproxy 3 0.26% 90% 43.73M 250.0M 278 2500 -- -- - good >>diamproxy instance 3 spawn with card 7
8/0 diamproxy 5 0.31% 90% 43.73M 250.0M 277 2500 -- -- - good
9/0 diamproxy 1 1.00% 90% 43.86M 250.0M 130 2500 -- -- - good
10/0 diamproxy 4 0.98% 90% 43.96M 250.0M 133 2500 -- -- - good
11/0 diamproxy 6 0.24% 90% 43.74M 250.0M 277 2500 -- -- - good
12/0 diamproxy 11 1.04% 90% 44.01M 250.0M 144 2500 -- -- - good
13/0 diamproxy 2 0.97% 90% 43.84M 250.0M 134 2500 -- -- - good
14/0 diamproxy 7 1.04% 90% 43.99M 250.0M 138 2500 -- -- - good
16/0 diamproxy 13 0.96% 90% 43.74M 250.0M 261 2500 -- -- - good
在PGW和PCRF之间正确交换活动和直径消息后，生成了相应的Diamproxy设备。
反馈