ASR 9900系列交换矩阵说明和故障排除示例

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已更新: 2015 年 3 月 19 日

文档 ID:117718

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简介

本文档介绍在ASR 9922和ASR 9912中使用单独的交换矩阵卡，类似于思科运营商路由系统(CRS)实施的交换矩阵架构。

思科的ASR 9000(ASR9K)使用三阶段交换矩阵系统。在其他机箱类型（例如9006和9010）中，三级交换矩阵在线卡(LC)上分为阶段1和阶段3，在路由交换处理器(RSP)上分为阶段2。随着9922和9912的出现，交换矩阵的第二阶段已从RSP移至专用交换矩阵卡，并且使用路由处理器(RP)卡代替RSP。

每个交换矩阵卡(FC)都是其自己的主干。这些术语可以互换使用，也可以互换使用CRS术语中使用的术语“平面”。下面是系统的高级视图，交叉开关标记为“交换矩阵输入”。

交换矩阵概述

每个FC有两个交换矩阵ASIC，通常称为交叉开关ASIC，映射为实例0和1，而每个LC和RP有一个交叉开关接口，即实例0。

在每个LC上，有两个连接到每个FC的序列化程序/反序列化程序(SerDes)接口，每个FC交叉开关（0和1）有一个SerDes接口。这些FC交叉开关在三级交换矩阵中充当我们的第二阶段，而第一阶段和第三阶段作为LC的交叉开关。此外，每个RP每个FC都有一个SerDes接口，并且此连接始终在FC交叉开关实例0上。

交换矩阵详细信息

网络处理器(NP)和交换矩阵接口ASIC(FIA)不受交叉开关链路调度的限制，流量在构成SerDes接口的所有八条链路上进行负载均衡。如果SerDes接口内的单个链路出现问题，则整个接口将关闭。检测到此故障后，交换矩阵驱动程序会发出重新培训以尝试修复链路。

台风

使用当前的台风架构，可支持五个FC。这些卡为每个SerDes接口提供8x7.5 G链路，这相当于计算编码后55 G的可用带宽。每个LC的全部五个FC将具有2x55x5 = 550 Gbps的可用带宽。当计算4+1交换矩阵冗余时，每个LC提供440 Gbps。

注意：在带RSP-440和Thophon LC的9000系列机箱中，每个RSP有4x8x7.5 G链路，外加两个附加链路。每个RSP的四条链路提供每个LC的440 Gbps完整可用带宽。

战斧

下一代卡支持115 Gbps SerDes连接。借助7个交换矩阵卡的额外支持，这可提供2x115x7 = 1.61 Tbps的每插槽带宽。考虑到6+1交换矩阵冗余，每插槽可提供1.38 Tbps。

交换矩阵卡要求

由于交叉开关上的带宽在所有FIA和NP之间共享，因此需要进行一些计算才能确定真正的带宽和交换矩阵冗余。

要计算特定LC所需的最小FC数，请使用以下公式：

(num_ports_used*port_bandwidth)/(FC_bandwidth)

对于具有30个端口的36x10 GigE卡，这是(30*10)/(110)=2.72 FC或三个四舍五入的FC。

要计算n+1冗余度，请使用以下公式：

(num_ports_used*port_bandwidth)/(FC_bandwidth)+ 1

对于36x10 GigE卡，如果全部使用36个端口，则此值为5。

下表概述了全线速所需的FC数量。

LC类型	最小值.机箱中需要FC	n+1冗余所需的FC数量
A9K-MOD80	1	2
A9K-MOD160	2	3
A9K-2x100GE	2	3
A9K-24x10GE	3	4
A9K-36x10GE	4	5

检查交换矩阵卡

交叉开关链路状态

首先要检查的是所有平面(FC)上的所有SerDes链路是否都已启用。要检查此项，请输入show controller fabric plane [all | [0-6]]命令。在本例中，由于有两个RP和三个LC，因此有(1x2)+(2x3)= 8条链路，并且所有链路都可连接到所有平面。

注意：在版本4.3.0及更高版本中，可以一次检查所有平面的状态。以前，每个必须单独指定。

RP/0/RP1/CPU0:ASR9922-B#show platform
Tue Apr 15 14:24:00.935 UTC
Node            Type                      State            Config State
-----------------------------------------------------------------------------
0/RP0/CPU0      ASR-9922-RP-SE(Standby)   IOS XR RUN       PWR,NSHUT,MON
0/RP1/CPU0      ASR-9922-RP-SE(Active)    IOS XR RUN       PWR,NSHUT,MON
0/0/CPU0        A9K-2x100GE-SE            IOS XR RUN       PWR,NSHUT,MON
0/2/CPU0        A9K-36x10GE-SE            IOS XR RUN       PWR,NSHUT,MON
0/3/CPU0        A9K-MOD160-TR             IOS XR RUN       PWR,NSHUT,MON
0/3/1           A9K-MPA-4X10GE            OK               PWR,NSHUT,MON


RP/0/RP1/CPU0:ASR9922-B#show controller fabric plane all
Mon Apr 14 14:37:00.116 UTC
Flags: Admin State: 1-Up 2-Down 12-UnPowered 16-Shutdown
       Oper  State: 1-Up 2-Down 3-Admin Down
Summary for All Fabric Planes:
Plane Id  Admin State  Oper State  Links Up Links Down  In Pkt Count  Out Pkt count
===================================================================================
0             01            01       08          00       346770          431250
1             01            01       08          00       44397            44397
2             01            01       08          00       44459            44459
3             01            01       08          00       94005            94005
4             01            01       08          00       73814            73814

如果链路显示为下方的命令show controller fabric crossbar link-status instance <0-1> spine <FC_num>可以用于准确标识哪个。在本示例中，有五个到FC4实例0的交叉开关链路和三个到FC4实例1的交叉开关链路(5+3=8)。由于RP，实例0上还有两个。

注意：有关逻辑插槽到物理插槽映射的详细信息，请参阅附录。

RP/0/RP1/CPU0:ASR9922-B#show controllers fabric crossbar link-status instance 0 spine 4
Fri Apr 18 18:08:31.953 UTC
PORT    Remote Slot  Remote Inst    Logical ID  Status
======================================================
01        05               00             0        Up
04        04               00             0        Up
05        02               00             0        Up
08        00               00             0        Up
09        01               00             0        Up


RP/0/RP1/CPU0:ASR9922-B#show controllers fabric crossbar link-status instance 1 spine 4
Fri Apr 18 18:09:13.637 UTC
PORT    Remote Slot  Remote Inst    Logical ID  Status
======================================================
00        05               00             0        Up
04        04               00             0        Up
05        02               00             0        Up

交叉开关统计信息

由于之前输出中收集的链路状态是映射和这些统计信息，因此可以轻松缩小存在流量问题的任何组件。对于每个交叉开关端口（SerDes接口），将有入口（从LC）和出口（向LC）统计信息。这些是按FC交叉开关实例收集的。

RP/0/RP1/CPU0:ASR9922-B#show controller fabric crossbar statistics instance 0 spine 4
Tue Apr 22 16:52:23.162 UTC
Port statistics for xbar:0 port:0
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:1
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 14016
    Egress Packet Count Since Last Read        : 24971

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:2
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:4
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 21056
    Egress Packet Count Since Last Read        : 32195

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:5
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 7024
    Egress Packet Count Since Last Read        : 10477

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:6
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:7
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:8
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================
    Ingress Packet Count Since Last Read       : 37388
    Egress Packet Count Since Last Read        : 37388

Port statistics for xbar:0 port:9
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 72882
    Egress Packet Count Since Last Read        : 47335

Low priority stats (multicast)
===========================
    Ingress Packet Count Since Last Read       : 37386
    Egress Packet Count Since Last Read        : 37386

Port statistics for xbar:0 port:10
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:11
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:12
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:13
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:14
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:15
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:16
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:17
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:18
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:19
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:20
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:22
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:24
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================


Total Unicast In:    114978
Total Unicast Out:   114978
Total Multicast In:  74774
Total Multicast Out: 74774

检查线路卡

在LC本身，交叉开关和每个FIA之间有2x8x6.25链路，每个FIA提供100 G的原始带宽。在每个NP和FIA之间有一个8x6.25链路，每个NP提供50 G的原始带宽。

注意：参考的带宽是原始带宽。考虑开销后，实际带宽稍低。

交叉开关链路状态

LC的交叉开关链路状态的集合与FC的链路状态类似，但在本例中，将看到从FC交叉开关到LC交叉开关的链路以及从LC交叉开关到FIA链路的链路。如前所述，每个FIA通过两个链路连接到交叉开关。在本例中，端口00和24都连接到FIA 2。与前面的示例一样，远程插槽22-26是FC，0/2/CPU0对应于插槽4本身。

RP/0/RP1/CPU0:ASR9922-B#show controller fabric crossbar link-status inst 0 loc 0/2/CPU0
Wed Apr 23 14:22:42.250 UTC
PORT    Remote Slot  Remote Inst    Logical ID  Status
======================================================
00        04               02             1        Up
01        04               01             1        Up
02        04               01             0        Up
03        04               00             0        Up
04        04               00             1        Up
05        04               03             1        Up
06        04               05             1        Up
07        25               01             0        Up
08        04               03             0        Up
09        25               00             0        Up
10        04               05             0        Up
11        26               01             0        Up
12        26               00             0        Up
14        24               00             0        Up
15        24               01             0        Up
16        23               00             0        Up
17        23               01             0        Up
20        22               00             0        Up
22        22               01             0        Up
23        04               04             1        Up
24        04               02             0        Up
25        04               04             0        Up

交叉开关统计信息

使用之前输出中收集的链路状态作为参考映射，以下统计信息输出可以用作缩小任何出现流量丢失的组件范围的简单方法。

RP/0/RP1/CPU0:ASR9922-B#show controller fabric crossbar statistics instance 0 loc 0/2/CPU0
Wed Apr 23 15:53:41.955 UTC
Port statistics for xbar:0 port:0
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15578
    Egress Packet Count Since Last Read        : 11957

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:1
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15775
    Egress Packet Count Since Last Read        : 11647

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:2
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15646
    Egress Packet Count Since Last Read        : 19774

Low priority stats (multicast)
===========================
    Ingress Packet Count Since Last Read       : 31424
    Egress Packet Count Since Last Read        : 188544

Port statistics for xbar:0 port:3
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15663
    Egress Packet Count Since Last Read        : 15613

Low priority stats (multicast)
===========================
    Ingress Packet Count Since Last Read       : 31424
    Egress Packet Count Since Last Read        : 188547

Port statistics for xbar:0 port:4
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15758
    Egress Packet Count Since Last Read        : 15813

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:5
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15742
    Egress Packet Count Since Last Read        : 15628

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:6
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15773
    Egress Packet Count Since Last Read        : 13687

Low priority stats (multicast)
===========================
    Ingress Packet Count Since Last Read       : 78666

Port statistics for xbar:0 port:7
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:8
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15679
    Egress Packet Count Since Last Read        : 15793

Low priority stats (multicast)
===========================
    Ingress Packet Count Since Last Read       : 31424
    Egress Packet Count Since Last Read        : 188544

Port statistics for xbar:0 port:9
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 72826
    Egress Packet Count Since Last Read        : 58810

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:10
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15653
    Egress Packet Count Since Last Read        : 23041

Low priority stats (multicast)
===========================
    Egress Packet Count Since Last Read        : 188544

Port statistics for xbar:0 port:11
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:12
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 54172
    Egress Packet Count Since Last Read        : 35440

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:14
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15161
    Egress Packet Count Since Last Read        : 17790

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:15
==============================
Hi priority stats (unicast)
===========================

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:16
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15220
    Egress Packet Count Since Last Read        : 17790

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:17
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 1
    Egress Packet Count Since Last Read        : 1

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:20
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 36457
    Egress Packet Count Since Last Read        : 58699

Low priority stats (multicast)
===========================
    Ingress Packet Count Since Last Read       : 188549
    NULL FPOE Drop Count                       : 2
    Egress Packet Count Since Last Read        : 235786

Port statistics for xbar:0 port:22
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 1
    Egress Packet Count Since Last Read        : 1

Low priority stats (multicast)
===========================

Port statistics for xbar:0 port:23
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15775
    Egress Packet Count Since Last Read        : 15835

Low priority stats (multicast)
===========================
    Ingress Packet Count Since Last Read       : 31424

Port statistics for xbar:0 port:24
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15843
    Egress Packet Count Since Last Read        : 19464

Low priority stats (multicast)
===========================
    Ingress Packet Count Since Last Read       : 31424
    Egress Packet Count Since Last Read        : 188544

Port statistics for xbar:0 port:25
==============================
Hi priority stats (unicast)
===========================
    Ingress Packet Count Since Last Read       : 15646
    Egress Packet Count Since Last Read        : 15586

Low priority stats (multicast)
===========================
    Egress Packet Count Since Last Read        : 188544


Total Unicast In:    382369
Total Unicast Out:   382369
Total Multicast In:  424335
Total Multicast Out: 1367053

故障排除

交叉开关端口关闭

第一个输出表示有两个RP和两个LC。第二个输出表明从FC4到远程插槽0(RP0)的链路已关闭。

RP/0/RP0/CPU0:ASR9k-1#show controllers fabric plane all

Plane Id Admin State  Oper State    Links Up  Links Down  In Pkt Count   Out Pkt count
======================================================================================
0          01           01            06        00         62266063301    62266209776
1          01           01            06        00         18730254608    18730254616
2          01           01            06        00         18730354183    18730354187
3          01           01            06        00         62257126982    62257127007
4          01           01            05        01         37448788006    37448788023


RP/0/RP0/CPU0:ASR9k-1#show controllers fabric crossbar link-status instance 0 spine 4
PORT    Remote Slot  Remote Inst    Logical ID  Status
======================================================
04        04               00             0        Up
08        00               00             0        Down
09        01               00             0        Up
10        03               00             0        Up

由于交叉开关链路关闭时，来自FC的带宽在LC上的所有FIA和NP之间共享，因此在台风系统中，LC的净带宽将减少55 G。在系统冗余的情况下，系统可以在链路断开的情况下运行，但应立即进行调查。

当交叉开关链路断开时，可能会看到短暂的流量下降，交换矩阵驱动程序会重新训练链路以尝试自动恢复。如果此操作失败，则在线插拔(OIR)也可能会恢复问题。如有其他问题，请联系技术支持中心(TAC)。

主干不可用系统日志

这些消息表示系统运行在建议的五个FC下。虽然建议始终运行五个FC，但这并不一定意味着系统中LC的带宽丢失。有关详细信息，请参阅“交换矩阵卡要求”部分。

RP/0/RP1/CPU0:May 13 14:42:22.810 : pfm_node_rp[353]:
 %PLATFORM-FABMGR-1-SPINE_UNAVAILABLE : Set|fabmgr[303204]|Fabric Manager(0x1032000)|
Number of active spines has dropped below the recommended number 5

RP/0/RP1/CPU0:May 13 14:53:18.897 : pfm_node_rp[353]: 
%PLATFORM-FABMGR-1-SPINE_UNAVAILABLE : Clear|fabmgr[303204]|Fabric Manager(0x1032000)|
Number of active spines has dropped below the recommended number 5

FC非活动系统日志

执行FC的OIR时，必须按下两个机械按钮，才能部分取下卡，这需要OIR才能恢复。这些按钮的原因是允许FC正常关闭。

在9922路由器上，顶部按钮纯机械式，而下部按钮则向系统发送信号以平稳关闭卡。会看到此格式的系统日志。如果未按下按钮，而OIR无法恢复问题，请联系TAC。

RP/0/RP0/CPU0:Dec 24 10:45:27.108 MST: fab_xbar_sp3[220]: FC3 Inactive due to
 Front Panel Switch Press. Please OIR to recover.

Appendix

逻辑插槽到物理插槽的映射

这些输出是9922和9912路由器的逻辑到物理插槽的映射。查看fabric show命令时需要此信息。

9922

slot 00 -> 0/RP0/CPU0 (0x1)
slot 01 -> 0/RP1/CPU0 (0x11)
slot 02 -> 0/0/CPU0 (0x821)
slot 03 -> 0/1/CPU0 (0x831)
slot 04 -> 0/2/CPU0 (0x841)
slot 05 -> 0/3/CPU0 (0x851)
slot 06 -> 0/4/CPU0 (0x861)
slot 07 -> 0/5/CPU0 (0x871)
slot 08 -> 0/6/CPU0 (0x881)
slot 09 -> 0/7/CPU0 (0x891)
slot 10 -> 0/8/CPU0 (0x8a1)
slot 11 -> 0/9/CPU0 (0x8b1)
slot 12 -> 0/10/CPU0 (0x8c1)
slot 13 -> 0/11/CPU0 (0x8d1)
slot 14 -> 0/12/CPU0 (0x8e1)
slot 15 -> 0/13/CPU0 (0x8f1)
slot 16 -> 0/14/CPU0 (0x901)
slot 17 -> 0/15/CPU0 (0x911)
slot 18 -> 0/16/CPU0 (0x921)
slot 19 -> 0/17/CPU0 (0x931)
slot 20 -> 0/18/CPU0 (0x941)
slot 21 -> 0/19/CPU0 (0x951)
slot 22 -> 0/FC0/SP (0x1960)
slot 23 -> 0/FC1/SP (0x1970)
slot 24 -> 0/FC2/SP (0x1980)
slot 25 -> 0/FC3/SP (0x1990)
slot 26 -> 0/FC4/SP (0x19a0)
slot 27 -> 0/FC5/SP (0x19b0)
slot 28 -> 0/FC6/SP (0x19c0)
slot 34 -> 0/BPID0/SP (0x1220)
slot 35 -> 0/BPID1/SP (0x1230)
slot 36 -> 0/FT0/SP (0x640)
slot 37 -> 0/FT1/SP (0x650)
slot 38 -> 0/FT2/SP (0x660)
slot 39 -> 0/FT3/SP (0x670)
slot 40 -> 0/PM0/SP (0xe80)
slot 41 -> 0/PM1/SP (0xe90)
slot 42 -> 0/PM2/SP (0xea0)
slot 43 -> 0/PM3/SP (0xeb0)
slot 44 -> 0/PM4/SP (0xec0)
slot 45 -> 0/PM5/SP (0xed0)
slot 46 -> 0/PM6/SP (0xee0)
slot 47 -> 0/PM7/SP (0xef0)
slot 48 -> 0/PM8/SP (0xf00)
slot 49 -> 0/PM9/SP (0xf10)
slot 50 -> 0/PM10/SP (0xf20)
slot 51 -> 0/PM11/SP (0xf30)
slot 52 -> 0/PM12/SP (0xf40)
slot 53 -> 0/PM13/SP (0xf50)
slot 54 -> 0/PM14/SP (0xf60)
slot 55 -> 0/PM15/SP (0xf70)

9912

slot 00 -> 0/RP0/CPU0 (0x1)
slot 01 -> 0/RP1/CPU0 (0x11)
slot 02 -> 0/0/CPU0 (0x821)
slot 03 -> 0/1/CPU0 (0x831)
slot 04 -> 0/2/CPU0 (0x841)
slot 05 -> 0/3/CPU0 (0x851)
slot 06 -> 0/4/CPU0 (0x861)
slot 07 -> 0/5/CPU0 (0x871)
slot 08 -> 0/6/CPU0 (0x881)
slot 09 -> 0/7/CPU0 (0x891)
slot 10 -> 0/8/CPU0 (0x8a1)
slot 11 -> 0/9/CPU0 (0x8b1)
slot 12 -> 0/FC0/SP (0x18c0)
slot 13 -> 0/FC1/SP (0x18d0)
slot 14 -> 0/FC2/SP (0x18e0)
slot 15 -> 0/FC3/SP (0x18f0)
slot 16 -> 0/FC4/SP (0x1900)
slot 17 -> 0/FC5/SP (0x1910)
slot 18 -> 0/FC6/SP (0x1920)
slot 25 -> 0/BPID0/SP (0x1190)
slot 26 -> 0/FT0/SP (0x5a0)
slot 27 -> 0/FT1/SP (0x5b0)
slot 40 -> 0/PM0/SP (0xe80)
slot 41 -> 0/PM1/SP (0xe90)
slot 42 -> 0/PM2/SP (0xea0)
slot 43 -> 0/PM3/SP (0xeb0)
slot 44 -> 0/PM4/SP (0xec0)
slot 45 -> 0/PM5/SP (0xed0)
slot 46 -> 0/PM6/SP (0xee0)
slot 47 -> 0/PM7/SP (0xef0)
slot 48 -> 0/PM8/SP (0xf00)
slot 49 -> 0/PM9/SP (0xf10)
slot 50 -> 0/PM10/SP (0xf20)
slot 51 -> 0/PM11/SP (0xf30)

组播

LC在交换矩阵上使用固定路径，该路径基于在组播流的源和组(S， G)上计算的哈希值。因此，对于LC上更高的组播吞吐量，有更多源和组的流量非常重要，这些流量会有所变化，以便在所有活动交换矩阵平面上均匀分布流量。如果删除或禁用所选FC，链路选择算法会在可用的活动交换矩阵平面中选择不同的链路。

组播转发使用称为交换矩阵组ID(FGID)的12位交换矩阵报头字段。位0和1保留给RP0/1。保留的10位（从2到11）用于寻址20个LC。由于1位可用于地址2 LC，因此成对LC [(LC0,LC10)、(LC1,LC11)、(LC2,LC12)等]之间存在冗余组播数据包复制（超播）。如果成对LC上没有接口加入该组播组，则成对LC上的本地交叉开关会丢弃冗余组播流量。

FGID位

插槽

RP0

RP1

LC0

LC1

LC2

LC3

LC4

LC5

LC6

LC7

LC8

LC9

配对插槽

LC10

LC11

LC12

LC13

LC14

LC15

LC16

LC17

LC18

LC19

修订历史记录

版本	发布日期	备注
1.0	19-Mar-2015	初始版本

由思科工程师提供

Sam Milstead
Cisco TAC Engineer.

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ASR 9900系列交换矩阵说明和故障排除示例

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关于此翻译

目录

简介

交换矩阵概述

交换矩阵详细信息

台风

战斧

交换矩阵卡要求

检查交换矩阵卡

交叉开关链路状态

交叉开关统计信息

检查线路卡

交叉开关链路状态

交叉开关统计信息

故障排除

交叉开关端口关闭

主干不可用系统日志

FC非活动系统日志

相关信息

Appendix

逻辑插槽到物理插槽的映射

9922

9912

组播

修订历史记录

由思科工程师提供

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