Dell EMC SmartFabric OS10 User Guide Release 10.5.0

聚合数据中心网络具有多个 SAN、服务器和 LAN 流量类型，对数据传输的不同方面敏感。例如，存储流量对数据包丢失敏感，而服务器流量对延迟敏感。在单个融合链路中，所有流量类型均会共存，而不会对其他性能施加限制。DCB 允许 iSCSI 和 FCoE SAN 流量与同一网络上的服务器和 LAN 流量共存。DCB 功能将减少或避免丢弃帧、重新传输和网络拥塞。

1. DCBX 配置（全局）

在交换机上全局配置 DCBX，以使用 PFC、ETS 和 iSCSI 配置来启用 DCBX TLV 消息的交换。

OS10# configure terminal
OS10(config)# dcbx enable

2. PFC 配置（全局）

在具有 dot1p 4、5、6 和 7 流量的流量类别上已启用 PFC。所有流量类别均使用默认 PFC 暂停共享缓冲区大小的设置，以及在网络 qos 策略映射中的入口队列处理中暂停帧。trust-map dot1p default 接收（信任）所有 dot1p 入口流量。

OS10(config)# class-map type network-qos test4
OS10(config-cmap-nqos)# match qos-group 4
OS10(config-cmap-nqos)# exit
OS10(config)# class-map type network-qos test5
OS10(config-cmap-nqos)# match qos-group 5
OS10(config-cmap-nqos)# exit
OS10(config)# class-map type network-qos test6
OS10(config-cmap-nqos)# match qos-group 6
OS10(config-cmap-nqos)# exit
OS10(config)# class-map type network-qos test7
OS10(config-cmap-nqos)# match qos-group 7
OS10(config-cmap-nqos)# exit

OS10(config)# policy-map type network-qos test
OS10(config-pmap-network-qos)# class test4
OS10(config-pmap-c-nqos)# pause
OS10(config-pmap-c-nqos)# pfc-cos 4
OS10(config-pmap-c-nqos)# exit
OS10(config-pmap-network-qos)# class test5
OS10(config-pmap-c-nqos)# pause
OS10(config-pmap-c-nqos)# pfc-cos 5
OS10(config-pmap-c-nqos)# exit
OS10(config-pmap-network-qos)# class test6
OS10(config-pmap-c-nqos)# pause
OS10(config-pmap-c-nqos)# pfc-cos 6
OS10(config-pmap-c-nqos)# exit
OS10(config-pmap-network-qos)# class test7
OS10(config-pmap-c-nqos)# pause
OS10(config-pmap-c-nqos)# pfc-cos 7
OS10(config-pmap-c-nqos)# exit
OS10(config-pmap-network-qos)# exit

OS10(config)# system qos
OS10(config-sys-qos)# trust-map dscp default

3. PFC 配置（接口）

将带 dot1p 信任的服务策略和 PFC 配置应用到接口。

OS10(config)# interface ethernet 1/1/53
OS10(conf-if-eth1/1/53)# no shutdown
OS10(conf-if-eth1/1/53)# service-policy input type network-qos test
OS10(conf-if-eth1/1/53)# trust-map dot1p default
OS10(conf-if-eth1/1/53)# priority-flow-control mode on
OS10(conf-if-eth1/1/53)# end

4. ETS 配置（全局）

信任 dot1p-map 将 dot1p 0、1、2 和 3 流量分配给 qos 组 0，将 dot1p 4、5、6 和 7 流量分配给 qos 组 1。qos-map traffic 类别映射将 qos 组 0 中的流量类别分配给队列 0，将 qos 组 1 流量分配给队列 1。队列策略映射将30% 的接口带宽分配给队列0，将70% 的带宽分配给队列1。

OS10(config)# trust dot1p-map tmap1
OS10(config-tmap-dot1p-map)# qos-group 0 dot1p 0-3
OS10(config-tmap-dot1p-map)# qos-group 1 dot1p 4-7
OS10(config-tmap-dot1p-map)# exit

OS10(config)# qos-map traffic-class tmap2
OS10(config-qos-map)# queue 0 qos-group 0
OS10(config-qos-map)# queue 1 qos-group 1
OS10(config-qos-map)# exit

OS10(config)# class-map type queuing cmap1
OS10(config-cmap-queuing)# match queue 0
OS10(config-cmap-queuing)# exit
OS10(config)# class-map type queuing cmap2
OS10(config-cmap-queuing)# match queue 1
OS10(config-cmap-queuing)# exit

OS10(config)# policy-map type queuing pmap1
OS10(config-pmap-queuing)# class cmap1
OS10(config-pmap-c-que)# bandwidth percent 30
OS10(config-pmap-c-que)# exit
OS10(config-pmap-queuing)# class cmap2
OS10(config-pmap-c-que)# bandwidth percent 70
OS10(config-pmap-c-que)# end

OS10(config)# system qos
OS10(config-sys-qos)# trust-map dot1p default

5. ETS 配置（接口和全局）

将服务策略与 dot1p 信任和 ETS 配置应用到接口或所有交换机接口上。交换机上只支持一个 qos-map traffic-class 映射。

OS10(config)# interface ethernet 1/1/53
OS10(conf-if-eth1/1/53)# trust-map dot1p tmap1
OS10(conf-if-eth1/1/53)# qos-map traffic-class tmap2
OS10(conf-if-eth1/1/53)# trust-map dot1p default
OS10(conf-if-eth1/1/53)# service-policy output type queuing pmap1
OS10(conf-if-eth1/1/53)# ets mode on
OS10(conf-if-eth1/1/53)# end

OS10(config)# system qos
OS10(config-sys-qos)# trust-map dot1p tmap1 
OS10(config-sys-qos)# qos-map traffic-class tmap2
OS10(config-sys-qos)# trust-map dot1p default
OS10(config-sys-qos)# service-policy output type queuing pmap1 
OS10(config-sys-qos)# ets mode on

6. 验证 DCB 配置

OS10(conf-if-eth1/1/53)# show configuration
!
interface ethernet1/1/53
 switchport access vlan 1
 no shutdown
 service-policy input type network-qos test
 trust-map dot1p default
 service-policy output type queuing pmap1
 ets mode on
 qos-map traffic-class tmap2
 trust-map dot1p tmap1
 priority-flow-control mode on

7. 验证 DCBX 运行状态

OS10(conf-if-eth1/1/53)# do show lldp dcbx interface ethernet 1/1/53
E-ETS Configuration TLV enabled           e-ETS Configuration TLV disabled
R-ETS Recommendation TLV enabled          r-ETS Recommendation TLV disabled
P-PFC Configuration TLV enabled           p-PFC Configuration TLV disabled
F-Application priority for FCOE enabled   f-Application Priority for FCOE disabled
I-Application priority for iSCSI enabled  i-Application Priority for iSCSI disabled
-----------------------------------------------------------------------------------

Interface ethernet1/1/53
 Port Role is Manual
 DCBX Operational Status is Enabled
 Is Configuration Source? FALSE
 Local DCBX Compatibility mode is IEEEv2.5
 Local DCBX Configured mode is AUTO
 Peer Operating version is IEEEv2.5
 Local DCBX TLVs Transmitted: ERPfI
 4 Input PFC TLV pkts, 3 Output PFC TLV pkts, 0 Error PFC pkts
 2 Input ETS Conf TLV Pkts, 27 Output ETS Conf TLV Pkts, 0 Error ETS Conf TLV Pkts
 2 Input ETS Reco TLV pkts, 27 Output ETS Reco TLV pkts, 0 Error ETS Reco TLV Pkts

Total DCBX Frames transmitted 0
Total DCBX Frames received 0
Total DCBX Frame errors 0
Total DCBX Frames unrecognized 0

8. 验证 PFC 配置和操作

OS10(conf-if-eth1/1/53)# do show lldp dcbx interface ethernet 1/1/53 pfc detail

Interface ethernet1/1/53
 Admin mode is on
 Admin is enabled, Priority list is 4,5,6,7
 Remote is enabled, Priority list is 4,5,6,7
 Remote Willing Status is disabled
 Local is enabled, Priority list is 4,5,6,7
 Oper status is init
 PFC DCBX Oper status is Up
 State Machine Type is Symmetric
 PFC TLV Tx Status is enabled
 Application Priority TLV  Parameters :
 --------------------------------------
 ISCSI TLV Tx Status is enabled
 Local ISCSI PriorityMap is 0x10
 Remote ISCSI PriorityMap is 0x10

 4 Input TLV pkts, 3 Output TLV pkts, 0 Error pkts
 4 Input Appln Priority TLV pkts, 3 Output Appln Priority TLV pkts, 
 0 Error Appln Priority TLV Pkts

9. 验证 ETS 配置和操作

OS10(conf-if-eth1/1/53)# do show lldp dcbx interface ethernet 1/1/53 ets detail

Interface ethernet1/1/53
Max Supported PG is 8
Number of Traffic Classes is 8
Admin mode is on

Admin Parameters :
------------------
Admin is enabled

PG-grp     Priority#         Bandwidth       TSA
------------------------------------------------
0        0,1,2,3,                30%         ETS
1        4,5,6,7                 70%         ETS
2                                0%          ETS
3                                0%          ETS
4                                0%          ETS
5                                0%          ETS
6                                0%          ETS
7                                0%          ETS

Remote Parameters :
-------------------
Remote is enabled
PG-grp     Priority#         Bandwidth       TSA
------------------------------------------------
0        0,1,2,3,                30%         ETS
1        4,5,6,7                 70%         ETS
2                                0%          SP
3                                0%          SP
4                                0%          SP
5                                0%          SP
6                                0%          SP
7                                0%          SP

Remote Willing Status is disabled
Local Parameters :
-------------------
Local is enabled

PG-grp     Priority#         Bandwidth       TSA
------------------------------------------------
0        0,1,2,3,                30%         ETS
1        4,5,6,7                 70%         ETS
2                                0%          ETS
3                                0%          ETS
4                                0%          ETS
5                                0%          ETS
6                                0%          ETS
7                                0%          ETS

Oper status is init
ETS DCBX Oper status is Up
State Machine Type is Asymmetric
Conf TLV Tx Status is enabled
Reco TLV Tx Status is enabled

2 Input Conf TLV Pkts, 27 Output Conf TLV Pkts, 0 Error Conf TLV Pkts
2 Input Reco TLV Pkts, 27 Output Reco TLV Pkts, 0 Error Reco TLV Pkts

10. iSCSI 优化配置（全局）

本示例接受在受监控的 iSCSi 会话中使用的老化时间和 TCP 端口的默认设置。Compellant 存储阵列连接到该端口。策略 iscsi 策略映射设置会在交换机上全局设置用于 iSCSI 流量的 6 CoS dot1p 优先级。默认情况下，iSCSI 流量使用优先级 4。iscsi priority-bits 0x40 命令可将应用程序 TLV 中 iSCSI 流量使用的通告 dot1p 优先级设置为 6.0x40 二进制 0 1 0 0 0 0 0 0。

OS10(conf-if-eth1/1/53)# iscsi profile-storage compellent
OS10(conf-if-eth1/1/53)# lldp tlv-select dcbxp-appln iscsi
OS10(conf-if-eth1/1/53)# exit

OS10(config)# iscsi target port 3261 ip-address 10.1.1.1
OS10(config)# policy-map type application policy-iscsi
OS10(config-pmap-application)# class class-iscsi
OS10(config-pmap-c-app)# set qos-group 6
OS10(config-pmap-c-app)# set cos 6
OS10(config-pmap-c-app)# exit
OS10(config-pmap-application)# exit

OS10(config)# system qos
OS10(config-sys-qos)# service-policy type application policy-iscsi
OS10(config-sys-qos)# exit

OS10(config)# iscsi session-monitoring enable
OS10(config)# iscsi priority-bits 0x40
OS10(config)# iscsi enable

11. 验证 iSCSI 优化（全局）

启用 iSCSI 优化后，将在 show 命令输出中添加 iSCSI 应用程序优先级 TLV 参数，以验证 PFC 配置。

OS10(conf-if-eth1/1/53)# do show lldp dcbx interface ethernet 1/1/53 pfc detail

Interface ethernet1/1/53
    Admin mode is on
    Admin is enabled, Priority list is 4,5,6,7
    Remote is enabled, Priority list is 4,5,6,7
    Remote Willing Status is disabled
    Local is enabled, Priority list is 4,5,6,7
    Oper status is init
    PFC DCBX Oper status is Up
    State Machine Type is Symmetric
    PFC TLV Tx Status is enabled
    Application Priority TLV  Parameters :
    --------------------------------------
    ISCSI TLV Tx Status is enabled
    Local ISCSI PriorityMap is 0x40
    Remote ISCSI PriorityMap is 0x10

    4 Input TLV pkts, 3 Output TLV pkts, 0 Error pkts
    4 Input Appln Priority TLV pkts, 3 Output Appln Priority TLV pkts, 0 Error Appln Priority TLV Pkts

12. DCBX 配置（接口）

本示例显示如何配置和验证不同的 DCBX 版本。

OS10(conf-if-eth1/1/53)# dcbx version cee
OS10(conf-if-eth1/1/53)# show configuration
!
interface ethernet1/1/53
 switchport access vlan 1
 no shutdown
 dcbx version cee
 service-policy input type network-qos test
 trust-map dot1p default
 service-policy output type queuing pmap1
 ets mode on
 qos-map traffic-class tmap2
 trust-map dot1p tmap1
 priority-flow-control mode on
              
OS10(conf-if-eth1/1/53)# do show lldp dcbx interface ethernet 1/1/53
E-ETS Configuration TLV enabled           e-ETS Configuration TLV disabled
R-ETS Recommendation TLV enabled          r-ETS Recommendation TLV disabled
P-PFC Configuration TLV enabled           p-PFC Configuration TLV disabled
F-Application priority for FCOE enabled   f-Application Priority for FCOE disabled
I-Application priority for iSCSI enabled  i-Application Priority for iSCSI disabled
-----------------------------------------------------------------------------------

Interface ethernet1/1/53
 Port Role is Manual
 DCBX Operational Status is Enabled
 Is Configuration Source? FALSE
 Local DCBX Compatibility mode is CEE
 Local DCBX Configured mode is CEE
 Peer Operating version is CEE
 Local DCBX TLVs Transmitted: ErPfi

Local DCBX Status
-----------------
DCBX Operational Version is 0
DCBX Max Version Supported is 0
Sequence Number: 2
Acknowledgment Number: 1
Protocol State: In-Sync

Peer DCBX Status
-----------------
DCBX Operational Version is 0
DCBX Max Version Supported is 0
Sequence Number: 1
Acknowledgment Number: 2
 3 Input PFC TLV pkts, 3 Output PFC TLV pkts, 0 Error PFC pkts
 3 Input PG TLV Pkts, 3 Output PG TLV Pkts, 0 Error PG TLV Pkts
 3 Input Appln Priority TLV pkts, 3 Output Appln Priority TLV pkts, 
 0 Error Appln Priority TLV Pkts

Total DCBX Frames transmitted 3
Total DCBX Frames received 3
Total DCBX Frame errors 0
Total DCBX Frames unrecognized 0                                                                                                                          

OS10(conf-if-eth1/1/53)# dcbx version cee
OS10(conf-if-eth1/1/53)# show configuration
!
interface ethernet1/1/53
 switchport access vlan 1
 no shutdown
 dcbx version ieee
 service-policy input type network-qos test
 trust-map dot1p default
 service-policy output type queuing pmap1
 ets mode on
 qos-map traffic-class tmap2
 trust-map dot1p tmap1
 priority-flow-control mode on

OS10(conf-if-eth1/1/53)# do show lldp dcbx interface ethernet 1/1/53
E-ETS Configuration TLV enabled           e-ETS Configuration TLV disabled
R-ETS Recommendation TLV enabled          r-ETS Recommendation TLV disabled
P-PFC Configuration TLV enabled           p-PFC Configuration TLV disabled
F-Application priority for FCOE enabled   f-Application Priority for FCOE disabled
I-Application priority for iSCSI enabled  i-Application Priority for iSCSI disabled
-----------------------------------------------------------------------------------

Interface ethernet1/1/53
 Port Role is Manual
 DCBX Operational Status is Enabled
 Is Configuration Source? FALSE
 Local DCBX Compatibility mode is IEEEv2.5
 Local DCBX Configured mode is IEEEv2.5
 Peer Operating version is IEEEv2.5
 Local DCBX TLVs Transmitted: ERPfI
 13 Input PFC TLV pkts, 4 Output PFC TLV pkts, 0 Error PFC pkts
 3 Input ETS Conf TLV Pkts, 26 Output ETS Conf TLV Pkts, 0 Error ETS Conf TLV Pkts
 3 Input ETS Reco TLV pkts, 26 Output ETS Reco TLV pkts, 0 Error ETS Reco TLV Pkts

Total DCBX Frames transmitted 0
Total DCBX Frames received 0
Total DCBX Frame errors 0
Total DCBX Frames unrecognized 0