Catalyst 9000交換器上的精確時間通訊協定(PTP)疑難排解

已更新: 2023 年 10 月 10 日

文件 ID:221062

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簡介

本文說明如何對Catalyst 9000交換器上的精確時間通訊協定(PTP)進行疑難排解。

必要條件

需求

思科建議您瞭解以下主題：

對精確時間協定(PTP)的理解

採用元件

本檔案中的資訊是根據Catalyst 9300、9400、9500和9600交換器。

Cat9300#show module
Switch  Ports    Model                Serial No.   MAC address     Hw Ver.       Sw Ver. 
------  -----   ---------             -----------  --------------  -------       --------
 1       65     C9300-48T             FCW2236C0WC  700b.4fa8.5280  V02           17.03.05      
Cat9300#

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。

慣例

如需文件慣例的詳細資訊，請參閱思科技術提示慣例。

限制和限制

Catalyst 9200交換器不支援PTP。
Stackwise中的Catalyst 9300不支援PTP。例如，如果堆疊中有2-8台交換器，則不支援PTP。
Stackwise-Virtual中的Catalyst 9400、9500或9600交換機不支援PTP。

有關適用於Catalyst 9000的PTP的限制和限制的詳盡清單，請參閱給定平台和版本的第2層配置指南的PTP部分。

Cisco Catalyst交換機支援Precision時間協定常見問題

技術

字詞	定義
大師級時鐘(GMC)	在PTP域內，主時鐘是使用PTP進行時鐘同步的主要時間源。特級時鐘通常有非常精確的時間源，例如GPS或原子鐘。當網路不需要任何外部時間參考且只需要內部同步時，主時鐘可以自由運行。
普通時鐘(OC)	普通時鐘是具有單個PTP埠的PTP時鐘。它作為PTP網路中的節點運行，並可被BMCA選為子域內的主節點或從節點。普通時鐘是PTP網路上最常見的時鐘型別，因為它們用作連線到需要同步的裝置上的網路端節點。普通時鐘與外部裝置有不同的介面。
邊界鍾(BC)	PTP網路中的邊界時鐘代替標準網路交換機或路由器運行。邊界時鐘有多個PTP埠，每個埠提供對獨立PTP通訊路徑的訪問。邊界時鐘提供PTP域之間的介面。它們會攔截和處理所有PTP消息，並傳遞所有其他網路流量。邊界時鐘使用BMCA選擇任何埠所看到的最佳時鐘。然後，將選定的埠設定為從埠。主埠同步下游連線的時鐘，而從埠同步上遊主時鐘。
透通時鐘(TC)	PTP網路中透明時鐘的作用是更新PTP事件消息中的時間間隔欄位。此更新補償了交換機延遲，其精確度在1皮秒以內。透明時鐘有兩種型別：
端到端(E2E)透明	測量SYNC和DELAY_REQUEST消息的PTP事件消息傳輸時間（也稱為駐留時間）。此測量的傳輸時間將新增到相應消息中的資料欄位（更正欄位）中：測量的SYNC消息的傳輸時間被新增到相應的SYNC或FOLLOW_UP消息的校正欄位中。測量的DELAY_REQUEST消息的傳輸時間被新增到相應的DELAY_RESPONSE消息的校正欄位。
對等(P2P)透明	如上所述使用E2E透明時鐘來測量PTP事件消息傳輸時間。此外，P2P透明時鐘可以測量上行鏈路的延遲。上行鏈路延遲是估計的上行鄰居P2P透明時鐘和P2P透明時鐘之間的資料包傳播延遲。這兩次（消息中轉時間和上行鏈路延遲時間）都新增到PTP事件消息的校正欄位，從裝置接收的消息的校正欄位包含所有鏈路延遲的總和。理論上，這是SYNC資料包的端到端總延遲（從主到從）。

PTP時鐘故障同步

一般故障點

導致在介面（傳輸中）或控制平面管制(CoPP)上緩衝或丟棄PTP資料包的網路擁塞。
防火牆攔截PTP資料包。
耗盡硬體資源，如CPU、記憶體或TCAM。
硬體或軟體限制，無法精確測量時間。

要採取的操作：

檢查Cat9k PTP常見問題頁面

特定故障點

通告和發現

症狀	可能的原因
普通時鐘CPU不處理來自GMC的通告資料包。普通時鐘不傳送「延遲請求」資料包。在PTP協商之後，時鐘無法同步。	Grandmaster Clock未配置為傳送Announce packets.PTP Packets lost in transit.PTP packets dropped by Interface、Control-Plane或ASIC。配置錯誤導致GMC傳送錯誤的PTP域/配置檔案或Normal Clock配置了錯誤的域/配置檔案。

要採取的操作：

驗證PTP配置和狀態：

執行介面或控制平面EPC以驗證時鐘正在接收和傳送PTP資料包：

如果EPC不可靠，請使用PTP調試收集的資料來驗證正在傳送和接收的PTP值：

最佳主時鐘演演算法(BMCA)

症狀	可能的原因
同步失敗忽略或拒絕來自GMC的PTP消息的時鐘記錄錯誤重新同步嘗試	網路裝置和GMC之間的PTP版本不相容。Announce packets中的時鐘資料不準確。同一域中的多個主時鐘導致時鐘不穩定。

要採取的操作：

排除任何可能導致延遲或不準確計時的中轉時鐘或邊界時鐘。

排除平台上的任何硬體或軟體限制，這些限制會妨礙精確計時。

收集PTP調試並檢查是否有任何錯誤。

主時鐘選擇

症狀	可能的原因
	最佳主時鐘演算法(BMCA)不選擇最準確的GMC。BMCA不計算網路延遲。優先順序設定不匹配。

要採取的操作：

同步郵件交換

症狀	可能的原因
	透明時鐘(TC)配置錯誤，例如PTP配置檔案或模式不正確。延遲計算出錯。同步消息資料包在傳輸過程中或OC的控制平面上丟棄。

要採取的操作：

延遲請求和響應

症狀	可能的原因
	透明時鐘無法計算精確的時間戳，從而導致不準確的延遲計算。延遲請求或響應資料包以錯誤的順序接收、在傳輸過程中丟失或在控制平面前被丟棄

要採取的操作：

更正和同步

症狀	可能的原因
	由時鐘計算出的時間校正和延遲補償不準確。硬體或軟體限制導致不正確的系統時鐘調整，從而導致同步失敗。

要採取的操作

PTP命令列介面Show命令

驗證PTP模式、配置檔案、身份、域、啟用PTP的介面和PTP介面的狀態：

Cat9300#show ptp clock
 PTP CLOCK INFO
  PTP Device Type: Unknown 
  PTP Device Profile: Default Profile 
  Clock Identity: 0x70:B:4F:FF:FE:A8:52:80 
  Clock Domain: 0 
  Network Transport Protocol: 802.3
  Number of PTP ports: 0 
Cat9300#

沒有PTP配置的介面將保留在域0中並處於INITIALIZING狀態。

Cat9300#show ptp brief
Interface                       Domain    PTP State
GigabitEthernet1/0/1            0         INITIALIZING

這是端到端透明模式下時鐘的過渡階段。

Cat9300#configuration terminal
Cat9300(config)#interface twe1/0/1
Cat9300(config-if)#shut
Cat9300(config-if)#no shut
Cat9300(config-if)#end
%LINK-3-UPDOWN: Interface TwentyFiveGigE1/0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface TwentyFiveGigE1/0/1, changed state to down

Cat9300#show ptp brief | i 1/0/1
Interface                       Domain    PTP State
TwentyFiveGigE1/0/1             8         FAULTY 

%LINK-3-UPDOWN: Interface TwentyFiveGigE1/0/1, changed state to up

Cat9300#show ptp brief | i 1/0/1
Interface                       Domain    PTP State
TwentyFiveGigE1/0/1             8         LISTENING    

%LINEPROTO-5-UPDOWN: Line protocol on Interface TwentyFiveGigE1/0/1, changed state to up

Cat9300#show ptp brief | i 1/0/1
Interface                       Domain    PTP State
TwentyFiveGigE1/0/1             8         UNCALIBRATED    
 
Cat9300#show ptp brief | i 1/0/1
Interface                       Domain    PTP State
TwentyFiveGigE1/0/1             8         SLAVE

Cat9300#show platform software fed switch active ptp debugs interface twe1/0/1 
Offload Monitor Data:
=======================================

Ofld sig cnt: 0, Ofld ts cnt: 0, Ofld miss cnt: 0, Ofld issue hit: 0 
Sig (rd,wr)ptr: (0,0), Nif (rd,wr)ptr: (0,0)
Drop counters:
=======================================

ptp messages dropped due to qos drain count : 0

Cat9300#show platform software fed switch active ifm mappings 
Interface                 IF_ID    Inst Asic Core Port SubPort Mac  Cntx LPN  GPN  Type Active
TwentyFiveGigE1/0/1       0x9        0   0   0    0      0      7    8    1    1    NRU  Y
<>
Cat9300#show platform software fed switch active ptp if-id 0x009
Displaying port data for if_id 9
=======================================

Port Mac Address 9C:54:16:AE:4C:81
Port Clock Identity 9C:54:16:FF:FE:AE:4C:80
Port number 1
PTP Version 2
domain_value 8
Profile Type: : DEFAULT
Clock Mode : TRANSPARENT CLOCK E2E
Delay mechanism: End-to-End
port_enabled: TRUE
ptt_port_enabled: TRUE
Port state: : SLAVE
sync_seq_num 52439
delay_req_seq_num 0
ptp vlan is valid : TRUE
ptp vlan id 10
port mode 2
tag native vlan : FALSE
num sync messages transmitted  0
num followup messages transmitted  0
num sync messages received  4434
num followup messages received  4434
num delay requests transmitted  0
num delay responses received 0
num delay requests received  0
num delay responses transmitted  0

Cat9300#show platform software fed switch active ptp domain 
Displaying data for domain number 8
=======================================

Profile Type : DEFAULT
Profile State: enabled
Clock Mode : TRANSPARENT CLOCK E2E
Delay Mechanism: : END-TO-END
PTP clock : 1970-1-1 1:45:13
mean_path_delay 0 nanoseconds
Transport Method : 802.3
Message general ip dscp  : 59
Message event ip dscp    : 47

Cat9300#show platform software fed switch active  ptp auto-calibrate 
PTP Auto Calibration:

PTP auto_calibration status : FALSE

C9300-4c80#ptp calibrate interface twe1/0/1 speed all 
%SYS-5-CONFIG_P: Configured programmatically by process PTP protocol engine from console as vty0
%PTP_RP_MODULE-6-PTP_AUTO_CALIBRATION_COMPLETE: PTP auto calibration on the interface TwentyFiveGigE1/0/1 is complete
%SYS-5-CONFIG_P: Configured programmatically by process PTP protocol engine from console as vty0

檢查平台資源

檢查介面
PTP資料包路徑中的輸入丟棄、輸出丟棄或CRC錯誤的非零值會導致故障。

Cat9300#show interfaces twe1/0/1 human-readable 
TwentyFiveGigE1/0/1 is up, line protocol is up (connected) 
  Hardware is Twenty Five Gigabit Ethernet, address is 9c54.16ae.4c81 (bia 9c54.16ae.4c81)
  MTU 1500 bytes, BW 10000000 Kbit/sec, DLY 10 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 10Gb/s, link type is auto, media type is SFP-10GBase-CX1
  input flow-control is on, output flow-control is unsupported 
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 3.0 kilobits , 5 pps 
  5 minute output rate 0 bits/sec, 0 packets/sec
     26,497 packets input, 1,955,114 bytes, 0 no buffer
     Received 26,477 broadcasts (26,476 multicasts)
     0 runts, 0 giants, 0 throttles 
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 26,476 multicast, 0 pause input
     0 input packets with dribble condition detected
     947 packets output, 124,533 bytes, 0 underruns
     Output 17 broadcasts (917 multicasts)
     0 output errors, 0 collisions, 3 interface resets
     2 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

檢查控制階段管制

PTP資料包通過低延遲隊列進行處理。PTP流量與其他網路流量型別共用策略器索引，因此最好驗證控制平面上沒有遞增丟包。

Cat9300#show platform hardware fed switch active qos queue stats internal cpu policier 

                         CPU Queue Statistics                  
============================================================================================
                                              (default) (set)     Queue        Queue
QId PlcIdx  Queue Name                Enabled   Rate     Rate      Drop(Bytes)  Drop(Frames)
--------------------------------------------------------------------------------------------
0    11     DOT1X Auth                  Yes     1000      1000     0            0          
1    1      L2 Control                  Yes     2000      2000     0            0          
2    14     Forus traffic               Yes     4000      4000     0            0          
3    0      ICMP GEN                    Yes     600       600      0            0          
4    2      Routing Control             Yes     5400      5400     0            0          
5    14     Forus Address resolution    Yes     4000      4000     0            0          
6    0      ICMP Redirect               Yes     600       600      0            0          
7    16     Inter FED Traffic           Yes     2000      2000     0            0          
8    4      L2 LVX Cont Pack            Yes     1000      1000     0            0          
9    19     EWLC Control                Yes     13000     13000    0            0          
10   16     EWLC Data                   Yes     2000      2000     0            0          
11   13     L2 LVX Data Pack            Yes     1000      1000     0            0          
12   0      BROADCAST                   Yes     600       600      0            0          
13   10     Openflow                    Yes     200       200      0            0          
14   13     Sw forwarding               Yes     1000      1000     0            0          
15   8      Topology Control            Yes     13000     13000    0            0          
16   12     Proto Snooping              Yes     2000      2000     0            0          
17   6      DHCP Snooping               Yes     400       400      0            0          
18   13     Transit Traffic             Yes     1000      1000     0            0          
19   10     RPF Failed                  Yes     200       200      0            0          
20   15     MCAST END STATION           Yes     2000      2000     0            0          
21   13     LOGGING                     Yes     1000      1000     0            0          
22   7      Punt Webauth                Yes     1000      1000     0            0          
23   18     High Rate App               Yes     13000     13000    0            0          
24   10     Exception                   Yes     200       200      0            0          
25   3      System Critical             Yes     1000      1000     0            0          
26   10     NFL SAMPLED DATA            Yes     200       200      0            0          
27   2      Low Latency                 Yes     5400      5400     0            0  <<< Queue for PTP traffic.         
28   10     EGR Exception               Yes     200       200      0            0          
29   5      Stackwise Virtual OOB       Yes     8000      8000     0            0          
30   9      MCAST Data                  Yes     400       400      0            0          
31   3      Gold Pkt                    Yes     1000      1000     0            0          

* NOTE: CPU queue policer rates are configured to the closest hardware supported value

                      CPU Queue Policer Statistics               
====================================================================
Policer    Policer Accept   Policer Accept  Policer Drop  Policer Drop
  Index         Bytes          Frames        Bytes          Frames
-------------------------------------------------------------------
0          4052             48              0             0          
1          3520420          10686           0             0          
2          1966076          16634           0             0     <<< PTP packets share this Policier Index w/other network traffic.      
3          0                0               0             0          
4          0                0               0             0          
5          0                0               0             0          
6          0                0               0             0          
7          0                0               0             0          
8          2937088          45892           0             0          
9          0                0               0             0          
10         1770             15              0             0          
11         0                0               0             0          
12         0                0               0             0          
13         20246            191             0             0          
14         24918            252             0             0          
15         0                0               0             0          
16         0                0               0             0          
17         0                0               0             0          
18         0                0               0             0          
19         0                0               0             0          

                  Second Level Policer Statistics             
====================================================================
20         8423584          73212           0             0          
21         50986            506             0             0          

Policer Index Mapping and Settings
--------------------------------------------------------------------
level-2   :   level-1                      (default)   (set) 
PlcIndex  :   PlcIndex                       rate      rate 
--------------------------------------------------------------------
20        :   1  2  8                        13000     13000
21        :   0 4 7 9 10 11 12 13 14 15      6000      6000
====================================================================

               Second Level Policer Config                        
====================================================================
    level-1 level-2                            level-2
QId PlcIdx  PlcIdx  Queue Name                 Enabled
--------------------------------------------------------------------
0    11      21      DOT1X Auth                  Yes
1    1       20      L2 Control                  Yes
2    14      21      Forus traffic               Yes
3    0       21      ICMP GEN                    Yes
4    2       20      Routing Control             Yes
5    14      21      Forus Address resolution    Yes
6    0       21      ICMP Redirect               Yes
7    16      -       Inter FED Traffic           No 
8    4       21      L2 LVX Cont Pack            Yes
9    19      -       EWLC Control                No 
10   16      -       EWLC Data                   No 
11   13      21      L2 LVX Data Pack            Yes
12   0       21      BROADCAST                   Yes
13   10      21      Openflow                    Yes
14   13      21      Sw forwarding               Yes
15   8       20      Topology Control            Yes
16   12      21      Proto Snooping              Yes
17   6       -       DHCP Snooping               No 
18   13      21      Transit Traffic             Yes
19   10      21      RPF Failed                  Yes
20   15      21      MCAST END STATION           Yes
21   13      21      LOGGING                     Yes
22   7       21      Punt Webauth                Yes
23   18      -       High Rate App               No 
24   10      21      Exception                   Yes
25   3       -       System Critical             No 
26   10      21      NFL SAMPLED DATA            Yes
27   2       20      Low Latency                 Yes
28   10      21      EGR Exception               Yes
29   5       -       Stackwise Virtual OOB       No 
30   9       21      MCAST Data                  Yes
31   3       -       Gold Pkt                    No 
<>

檢查CPU和記憶體

Cat9300#show platform resources 
**State Acronym: H - Healthy, W - Warning, C - Critical                                             
Resource                 Usage                 Max             Warning         Critical        State
----------------------------------------------------------------------------------------------------
 Control Processor       1.28%                 100%            90%             95%             H    
  DRAM                   3566MB(47%)           7575MB          85%             90%             H    
  TMPFS                  1001MB(13%)           7575MB          40%             50%             H    

show processes cpu sorted | ex 0.00
show cpu history 
show processes memory sorted

檢查TCAM

Cat9300#show platform hardware fed switch active fwd-asic resource tcam utilization 
Codes: EM - Exact_Match, I - Input, O - Output, IO - Input & Output, NA - Not Applicable

CAM Utilization for ASIC  [0]
 Table                  Subtype      Dir      Max     Used    %Used       V4       V6     MPLS    Other
 ------------------------------------------------------------------------------------------------------
 Mac Address Table      EM           I       32768       20    0.06%        0        0        0       20
 Mac Address Table      TCAM         I        1024       21    2.05%        0        0        0       21
 L3 Multicast           EM           I        8192        0    0.00%        0        0        0        0
 L3 Multicast           TCAM         I         512        9    1.76%        3        6        0        0
 L2 Multicast           EM           I        8192        0    0.00%        0        0        0        0
 L2 Multicast           TCAM         I         512       11    2.15%        3        8        0        0
 IP Route Table         EM           I       24576       12    0.05%       11        0        1        0
 IP Route Table         TCAM         I        8192       25    0.31%       12       10        2        1
 QOS ACL                TCAM         IO       5120       85    1.66%       28       38        0       19
 Security ACL           TCAM         IO       5120      129    2.52%       26       58        0       45
 Netflow ACL            TCAM         I         256        6    2.34%        2        2        0        2
 PBR ACL                TCAM         I        1024       22    2.15%       16        6        0        0
 Netflow ACL            TCAM         O         768        6    0.78%        2        2        0        2
 Flow SPAN ACL          TCAM         IO       1024       13    1.27%        3        6        0        4
 Control Plane          TCAM         I         512      282   55.08%      130      106        0       46 <<< Expected to be at least 50%
 Tunnel Termination     TCAM         I         512       18    3.52%        8       10        0        0
 Lisp Inst Mapping      TCAM         I        2048        1    0.05%        0        0        0        1
 Security Association   TCAM         I         256        4    1.56%        2        2        0        0
 CTS Cell Matrix/VPN
 Label                  EM           O        8192        0    0.00%        0        0        0        0
 CTS Cell Matrix/VPN
 Label                  TCAM         O         512        1    0.20%        0        0        0        1
 Client Table           EM           I        4096        0    0.00%        0        0        0        0
 Client Table           TCAM         I         256        0    0.00%        0        0        0        0
 Input Group LE         TCAM         I        1024        0    0.00%        0        0        0        0
 Output Group LE        TCAM         O        1024        0    0.00%        0        0        0        0
 Macsec SPD             TCAM         I         256        2    0.78%        0        0        0        2

平台工具

執行嵌入式資料包捕獲(EPC)

配置EPC

Cat9300#monitor capture tac [interface | control-plane] [in | out | both] [match | access-list] buffer size 100

注意：有關更多EPC配置選項，請檢視給定平台/版本的《網路管理配置指南》。

在介面級別驗證Rx PTP資料包

Cat9300#monitor capture tac interface twe1/0/1 in match any buffer size 100 
Cat9300#monitor capture tac start
Started capture point : tac
%BUFCAP-6-ENABLE: Capture Point tac enabled.
C9300-4c80#monitor capture stop
Capture statistics collected at software:
        Capture duration - 3 seconds
        Packets received - 28
        Packets dropped - 0
        Packets oversized - 0

Bytes dropped in asic - 0

Capture buffer exists till exported or cleared

Stopped capture point : tac
%BUFCAP-6-DISABLE: Capture Point tac disabled.
C9300-4c80#show monitor capture tac buffer brief | i PTP
    2   0.032858 74:8f:c2:dc:b0:63 -> 01:1b:19:00:00:00 PTPv2 82 Announce Message
   12   1.032894 74:8f:c2:dc:b0:63 -> 01:1b:19:00:00:00 PTPv2 82 Announce Message
   15   2.032831 74:8f:c2:dc:b0:63 -> 01:1b:19:00:00:00 PTPv2 82 Announce Message
   28   3.033414 74:8f:c2:dc:b0:63 -> 01:1b:19:00:00:00 PTPv2 82 Announce Message

檢驗Rx資料包是否到達控制平面

Cat9300#monitor capture cpu control-plane in match any buffer size 100
Cat9300#monitor capture cpu start
Started capture point : cpu
Cat9300#
*Sep 28 14:05:28.375: %BUFCAP-6-ENABLE: Capture Point cpu enabled.
Cat9300#

在控制平面級別驗證Tx PTP資料包

這表示Cisco IOS-XE軟體和CPU正在生成Rx PTP資料包。

注意：在下一跳交換機或SPAN/RSPAN上使用輸入EPC更可靠，可以驗證本地普通時鐘正在傳送PTP資料包。

注意：在物理介面上配置了EPC的情況下，出口上不會看到CPU生成的資料包，例如「」，這是EPC工具的已知限制。

Cat9300#monitor capture cpu control-plane out match any buffer size 100
Cat9300#monitor capture cpu start

收集PTP調試

偵錯	目的
自動校準
bmc	顯示選擇哪個介面
消息

自動校準調試

21:41:12.543: %LINK-5-CHANGED: Interface TwentyFiveGigE1/0/1, changed state to administratively down
21:41:13.542: %LINEPROTO-5-UPDOWN: Line protocol on Interface TwentyFiveGigE1/0/1, changed state to down
21:41:13.543: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to down
1:41:29.714: Autocalibration: No autocalibration is progress (status - 0) or linkup interface TwentyFiveGigE1/0/1 different from autocalibrtion interface No interface
21:41:30.118: %SYS-5-CONFIG_I: Configured from console by console
21:41:31.714: %LINK-3-UPDOWN: Interface TwentyFiveGigE1/0/1, changed state to down
21:41:35.821: %LINK-3-UPDOWN: Interface TwentyFiveGigE1/0/1, changed state to up
21:41:37.824: %LINEPROTO-5-UPDOWN: Line protocol on Interface TwentyFiveGigE1/0/1, changed state to up
21:41:37.824: Autocalibration: No autocalibration is progress (status - 0) or linkup interface TwentyFiveGigE1/0/1 different from autocalibrtion interface No interface
21:41:38.849: Autocalibration: No autocalibration is progress (status - 0) or linkup interface Vlan10 different from autocalibrtion interface No interface
21:41:39.849: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to up

bmc debug

21:41:12.543: %LINK-5-CHANGED: Interface TwentyFiveGigE1/0/1, changed state to administratively down
21:41:13.542: %LINEPROTO-5-UPDOWN: Line protocol on Interface TwentyFiveGigE1/0/1, changed state to down
21:41:13.543: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to down
21:41:30.118: %SYS-5-CONFIG_I: Configured from console by console
21:41:31.714: %LINK-3-UPDOWN: Interface TwentyFiveGigE1/0/1, changed state to down
21:41:35.821: %LINK-3-UPDOWN: Interface TwentyFiveGigE1/0/1, changed state to up
21:41:37.824: %LINEPROTO-5-UPDOWN: Line protocol on Interface TwentyFiveGigE1/0/1, changed state to up
21:41:39.849: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to up
21:41:40.277:  Set  gmc interface: TwentyFiveGigE1/0/1 <<<

消息調試

Cat9300#clear logging
Cat9300#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Clear logging buffer [confirm]
Cat9300(config)#
Cat9300(config)#int twe1/0/1
Cat9300(config-if)#shut
Cat9300(config-if)#end
Cat9300#
Cat9300#debug ptp messages 
PTP Messages debugging is on
Cat9300#
Cat9300#conf  t
Enter configuration commands, one per line.  End with CNTL/Z.
Cat9300(config)#interface twe1/0/1
Cat9300(config-if)#no shut
Cat9300(config-if)#end
Cat9300#
Cat9300#show ptp bri | i 1/0/1
TwentyFiveGigE1/0/1             8         FAULTY          
        

Cat9300#show ptp bri | i 1/0/1
TwentyFiveGigE1/0/1             8         LISTENING       
          
Cat9300#show ptp bri | i 1/0/1
TwentyFiveGigE1/0/1             8         UNCALIBRATED    
         
Cat9300#show ptp bri | i 1/0/1
TwentyFiveGigE1/0/1             8         SLAVE           
     
        
Cat9300#undebug all
All possible debugging has been turned off
Cat9300#
Cat9300#show logging
<>
Log Buffer (131072 bytes):

21:59:06.980: %LINK-3-UPDOWN: Interface TwentyFiveGigE1/0/1, changed state to down
21:59:07.826: %SYS-5-CONFIG_I: Configured from console by console
21:59:11.271: %LINK-3-UPDOWN: Interface TwentyFiveGigE1/0/1, changed state to up
21:59:12.976: Cisco IOS-FMAN-PTP:retrieve interface: Twe1/0/1 iif_id: 9(fmanrp_ptp_port_data_update)  ptp port data:  <<< local data sent by clock  
           if_hdl = 9
           mac address = 9c54.16ae.4c81 <<< similar to local clock identity 
           domain_value = 8
           port_number = 1
           port_state = 4
           port_enabled = 1
           ptt_port_enabled = 1
           delete_flag = False

21:59:12.976: ####ptp_port_data PTP_SHIM_TDL_MSG####:
message@ptp_port_data: {
  ptp_port_data@ptp_port_data: {
    if_hdl@U32:9
    domain_value@U8:8
    clk_identity[0]@U8:156
    clk_identity[1]@U8:84
    clk_identity[2]@U8:22
    clk_identity[3]@U8:255
    clk_identity[4]@U8:254
    clk_identity[5]@U8:174
    clk_identity[6]@U8:76
    clk_identity[7]@U8:128
    intf_mac@tdl_mac_addr: {
      mac[0]@U8:156
      mac[1]@U8:84
      mac[2]@U8:22
      mac[3]@U8:174
      mac[4]@U8:76
      mac[5]@U8:129
    }
    port_number@U8:1
    sync_interval_96_32@U64:5
    sync_interval_31_0@U32:57005
    pdelay_req_avg_interval@U8:0
    port_state@U8**MSG 00030 TRUNCATED**
**MSG 00030 CONTINUATION #01**:4
    port_enabled@U8:1
    ptt_port_enabled@U8:1
    sync_interval@I8:0
    delay_req_interval@I8:0
    pdelay_req_interval@I8:0
    ptp_vlan_id@U16:10
    ptp_vlan_id_valid@tdl_boolean:TDL_TRUE
    port_mode@U8:2
    tag_native_vlan@tdl_boolean:TDL_FALSE
    ip_addr@U32:168430083
    transport_protocol@U8:3
    virtual_slot@U8:0
    virtual_port@U16:0
    peer_clk_ip@U32:0
    vrf_id@U32:0
    clk_idty_port_num@U16:1
    ptp_dest_mac_non_forwardable@tdl_boolean:TDL_FALSE
  }
  cfg_action@cfg_action:MCP_CFG_ACTION_NONE
}


21:59:13.273: %LINEPROTO-5-UPDOWN: Line protocol on Interface TwentyFiveGigE1/0/1, changed state to up <<<
21:59:13.846:  dst mac 1 (cond1)
21:59:13.846:  received message on TwentyFiveGigE1/0/1 <<< 
21:59:13.846: PTP message received, intf: TwentyFiveGigE1/0/1, type: ANNOUNCE
21:59:14.329: Cisco IOS-FMAN-PTP:retrieve interface: Twe1/0/1 iif_id: 9(fmanrp_ptp_port_data_update)  ptp port data:           
           if_hdl = 9           
           mac address = 9c54.16ae.4c81           
           domain_value = 8
           port_number = 1
           port_state = 8
           port_enabled = 1
           ptt_port_enabled = 1
           delete_flag = False

21:59:14.329: ####ptp_port_data PTP_SHIM_TDL_MSG####:
message@ptp_port_data: {
  ptp_port_data@ptp_port_data: {
    if_hdl@U32:9
    domain_value@U8:8
    clk_identity[0]@U8:156
    clk_identity[1]@U8:84
    clk_identity[2]@U8:22
    clk_identity[3]@U8:255
    clk_identity[4]@U8:254
    clk_identity[5]@U8:174
    clk_identity[6]@U8:76
    clk_identity[7]@U8:128
    intf_mac@tdl_mac_addr: {
      mac[0]@U8:156
      mac[1]@U8:84
      mac[2]@U8:22
      mac[3]@U8:174
      mac[4]@U8:76
      mac[5]@U8:129
    }
    port_number@U8:1
    sync_interval_96_32@U64:5
    sync_interval_31_0@U32:57005
    pdelay_req_avg_interval@U8:0
    port_state@U8**MSG 00031 TRUNCATED**
**MSG 00031 CONTINUATION #01**:8
    port_enabled@U8:1
    ptt_port_enabled@U8:1
    sync_interval@I8:0
    delay_req_interval@I8:0
    pdelay_req_interval@I8:0
    ptp_vlan_id@U16:10
    ptp_vlan_id_valid@tdl_boolean:TDL_TRUE
    port_mode@U8:2
    tag_native_vlan@tdl_boolean:TDL_FALSE
    ip_addr@U32:168430083
    transport_protocol@U8:3
    virtual_slot@U8:0
    virtual_port@U16:0
    peer_clk_ip@U32:0
    vrf_id@U32:0
    clk_idty_port_num@U16:1
    ptp_dest_mac_non_forwardable@tdl_boolean:TDL_FALSE
  }
  cfg_action@cfg_action:MCP_CFG_ACTION_NONE
}


21:59:14.845:  dst mac 1 (cond1)
21:59:14.846:  received message on TwentyFiveGigE1/0/1
21:59:14.846: PTP message received, intf: TwentyFiveGigE1/0/1, type: ANNOUNCE
21:59:15.845:  dst mac 1 (cond1)
21:59:15.845:  received message on TwentyFiveGigE1/0/1
21:59:15.845: PTP message received, intf: TwentyFiveGigE1/0/1, type: ANNOUNCE
21:59:15.976: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to up
21:59:16.775:  Set  gmc interface: TwentyFiveGigE1/0/1 <<<
21:59:16.776: Cisco IOS-FMAN-PTP:
 instance_conf data:
           instance_id = 0
           profile_type = 0
           profile_domain = 8
           clock_mode   = 3
           enable = 1
           is_gm = 0
           clocksource = 160
                gm_capable = 1
                gm_present = 1
           neighbor_prop_delay_threshold = 800 ns
           transport_protocol = 3
           delay_mech = 1
           scm_module_num = 1
           delete_flag = False

21:59:16.776: ####ptp_domain_config PTP_SHIM_TDL_MSG####:
message@ptp_domain_config: {
  ptp_domain_cfg@ptp_domain_cfg: {
    value@U8:0
    profile_type@U8:0
    enable@U8:1
    is_gm@U8:0
    priority2@U8:8
    clocksource@U8:160
    gm_capable@U8:1
    neighbor_prop_delay_threshold@U64:800
    clock_mode@U8:3
    pdelay_mechanism@U8:0
    gm_present@U8:1
    delay_mech@U8:1
    transport_protocol@U8:3
    master_module_num@U32:1
  }
  cfg_action@cfg_action:MCP_CFG_ACTION_NONE
}


Cat9300#

執行Show Platform Forward(SPF)

如果看到PTP資料包到達介面但未傳送到控制平面，請運行此工具。

1. Configure ingress EPC on PTP enabled interface.  

2. View buffer output and filter for PTP and make note of PTP packet number. 
Cat9300#show monitor capture tac buffer brief | i PTP
    2   0.032858 74:8f:c2:dc:b0:63 -> 01:1b:19:00:00:00 PTPv2 82 Announce Message <<<
   12   1.032894 74:8f:c2:dc:b0:63 -> 01:1b:19:00:00:00 PTPv2 82 Announce Message
   15   2.032831 74:8f:c2:dc:b0:63 -> 01:1b:19:00:00:00 PTPv2 82 Announce Message
   28   3.033414 74:8f:c2:dc:b0:63 -> 01:1b:19:00:00:00 PTPv2 82 Announce Message

3. Export buffer to .pcap on Switch's flash. 
Cat9300-4c80#monitor capture tac export location flash:/ptp-cpu.pcap

4. Execute the SPF command and make note of interface where PTP packets are expected to ingress and reference the packet number from buffer brief command. 
Cat9300#show platform hardware fed switch active forward interface twe1/0/1 pcap flash:ptp-cpu.pcap number 2 data 
Show forward is running in the background. After completion, syslog can be generated.

4. View Forward/Drop decision
Cat9300#show platform hardware fed switch active forward last summary 
Input Packet Details:
###[ Ethernet ]###
  dst       = 01:1b:19:00:00:00
  src=74:8f:c2:dc:b0:63
  type      = 0x8100
###[ 802.1Q ]###
     prio      = 0
     id        = 0
     vlan      = 10
     type      = 0x88f7
###[ Raw ]###
        load      = '0B 02 00 40 08 00 00 08 00 00 00 00 00 00 00 00 00 00 00 00 74 8F C2 FF FE DC B0 60 00 03 0B 11 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 F8 FE 43 6A 80 74 8F C2 FF FE DC B0 60 00 00 A0'
Ingress: 
   Port                      : TwentyFiveGigE1/0/1
   Global Port Number        : 1
   Local Port Number         : 1
   Asic Port Number          : 0
   Asic Instance             : 0
   Vlan                      : 10
   Mapped Vlan ID            : 5
   STP Instance              : 3
   BlockForward              : 0
   BlockLearn                : 0
   L3 Interface              : 38
       IPv4 Routing          : enabled
       IPv6 Routing          : enabled
       Vrf Id                : 0
   Adjacency:                 
       Station Index         : 172
       Destination Index     : 21151
       Rewrite Index         : 1
       Replication Bit Map   : 0xa    ['localCpu', 'remoteCpu']
   Decision:                  
       Destination Index     : 21151  [DI_CPUQ_LOW_LATENCY]
       Rewrite Index         : 1      [RI_CPU]
       Dest Mod Index        : 0      [IGR_FIXED_DMI_NULL_VALUE]
       CPU Map Index         : 0      [CMI_NULL]
       Forwarding Mode       : 0      [Bridging]
       Replication Bit Map   :        ['localCpu', 'remoteCpu']
       Winner                :        CPPMAC LOOKUP2
       Qos Label             : 65
       SGT                   : 0
       DGTID                 : 0
Egress: 
   Possible Replication      : 
       Port                  : CPU_Q_LOW_LATENCY <<< This should be the forwarding decision to this CPU queue. Any drops are unexpected and should be investigated. 
   Output Port Data          : 
     Port                    : CPU
       Asic Instance         : 0
       CPU Queue             :     27 [CPU_Q_LOW_LATENCY]
       Unique RI             : 0
       Rewrite Type          : 0      [Unknown]
       Mapped Rewrite Type   : 17     [CPU_ENCAP]
       Vlan                  : 10
       Mapped Vlan ID        : 5
********************************************************************************

C9300-4c80#

執行Packet Tracer(PT)

Catalyst 9000上的PTP警告

ID	標題思科錯誤ID
思科錯誤ID CSCvg24999	在ptp mode p2ptransparent上交換機崩潰。
思科錯誤ID CSCwf81913	PTP在Catalyst交換機上停止工作，埠進入未校準的狀態。
思科錯誤ID CSCwa49052	PTP偏移和平均路徑延遲可能會停滯在故障交換機上，而且永遠不會增加。思科錯誤ID
思科錯誤ID CSCvu73652	C9300 — 源埠不等於319的PTP事件消息被丟棄。思科錯誤 ID
思科錯誤ID CSCwc35946	在8275.1、802.1AS和預設PTP配置檔案之間更改時，CLI選項不一致。
思科錯誤ID CSCwc00050	無法通過Web UI更改PTP模式

Catalyst 9000交換器上的精確時間通訊協定(PTP)疑難排解

無偏見用語

關於此翻譯

目錄

簡介

必要條件

需求

採用元件

慣例

限制和限制

技術

PTP時鐘故障同步

一般故障點

特定故障點

要採取的操作

PTP命令列介面Show命令

檢查平台資源

平台工具

執行嵌入式資料包捕獲(EPC)

收集PTP調試

執行Show Platform Forward(SPF)

執行Packet Tracer(PT)

Catalyst 9000上的PTP警告

相關資訊

修訂記錄

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