IOS-XR,A9K,CRS,76知识相关.docx

88 自己提的问题 2014.6.5 朱IOS-XR,A9K,CRS,76相关 目录1.IOS-XR怎样查看模块光功率？32.IOS-XR下查看板卡和模块类型？43.IOS-XR打开telnet功能44.IOS-XR下怎样关闭和打开某一块线卡电源55.常见的10GE及更高速率模块封装方式有哪些？56.常见的光纤接口有哪些？ 用在什么场合？67.什么是POS接口？78.POS接口速率分类有哪些？89.配置POS接口时要注意什么？810.CRS的常见的10GE模块种类有哪些？811.CRS的常见的线卡种类有哪些？812.CRS和GSR的以太口默认是强制还是自动协商？813.7609与A9K的SP与RP的工作区别?814.7609上的常见板卡类型有哪些？815.SPA板卡类型怎样切换？816.100G-CFP接口怎样进入?1017.CRS与ME60-8之间10G端口用WAN模式对接失败原因?1018.CRS上的14口万兆板卡怎样切换wanmode与lanmode?1119.ASR9K更换板卡后，这块板卡的license需要重新申请吗？1220.10GE XFP模块以太与POS对应关系?1221.ASR9K的license申请及安装分配方法是什么？1222.思科官司网申请License时的Product ID怎样找到？1323.在激活A9K的License时出现错误是什么原因？1324.IOS升级IOS-XR时需要注意什么？1425.A9K的交换矩阵在哪里？为什么没有像CRS的MSC卡？1626.A9K的常见板卡有哪些？1627.思科的SFP+模块有哪些分类？1728.尾纤中的OM2，OM3是什么含义？1729.更换设备板卡的流程1730.10GE模块有强制模式吗？1731.A9K 特定版本对BVI接口的BUG？1832.7600-ES+4TG 和 6704 这2种板卡的区别。1833.c/s架构和b/s架构的区别1834.MSFC与PFC的区别?21 37 / 371. IOS-XR怎样查看模块光功率？命令：sh controllers tenGigE 0/7/0/0 phy RP/0/RSP0/CPU0:SH-SH-LC-SR-1.M2N.9010# show controllers tenGigE 0/7/0/0 phy Thu Jun 12 15:10:28.938 GMTXFP EEPROM port: 0 Xcvr Type: XFP Ext Type: 2.5 W, CDR Supported, No Tx Ref Clk input req., CLEI present, Connector Type: LC Ethernet Xcvr Codes: 10GBASE-ER, SONET Xcvr Codes: Encodeing: NRZ, Bit Rate Min.: 10000 Mbit/s Bit Rate Max.: 11300 Mbit/s Link Reach 9u SM fiber: 40 Km Device Tech.: 1550 nm EML, No wavelength ctrl, Cooled Xmtr, PIN detector, Xmtr not tunable, Vendor Name CISCO-OCLARO CDR Support: 9.95 Gb/s, 10.3 Gb/s, 10.5 Gb/s, 10.7 Gb/s, 11.1 Gb/s, Lineside Loopback Mode, XFI Loopback Mode, Vendor OUI: 00.0b.40 Vendor Part Number TRF7053FN-CB030 (rev.: 00) Wavelength: 1550.000 nm Wavelength Tolerance: 20 nm Vendor Serial Number: ONT175000NF Date Code (yy/mm/dd): 13/12/09 lot code: Diagnostic Monitoring: FEC BER not supported, average Rx power measured, Enhanced Options: Soft TX disable, Extended Id: XFP (0x00 ) CLEI Code: IPU3AE9CAB Part Number 10-2470-02 (ver.: V02 ) Temp/Alarm/Power Flags: COM, commercial -5C to 70C Product ID: XFP-10GER-192IR+ Signal Condition Control: Normal Async REFCLK, Tx Bias: 90.130 mAmps Tx Power: 1.188 mW (0.75 dBm) Rx Power: 0.135 mW (-8.71 dBm) Control Status: 如果觉的内容太多，可以进行筛选.命令: sh controllers tenGigE 0/7/0/0 phy | in Tx|RxRP/0/RSP0/CPU0:ASR.9010#show controllers tenGigE 0/7/0/0 phy | in Tx|RxThu Jun 12 15:19:14.715 GMT Ext Type: 2.5 W, CDR Supported, No Tx Ref Clk input req., CLEI present, Diagnostic Monitoring: FEC BER not supported, average Rx power measured, Tx Bias: 90.130 mAmps Tx Power: 1.188 mW (0.75 dBm) Rx Power: 0.135 mW (-8.69 dBm)2. IOS-XR下查看板卡和模块类型？RP/0/RSP0/CPU0:ASR.9010#show inventory Thu May 12 15:35:13.377 GMTNAME: module 0/RSP0/CPU0, DESCR: ASR9K Route Switch Processor with 440G/slot Fabric and 12GB PID: A9K-RSP440-SE, VID: V02, SN: FOC1723N0UNNAME: module 0/RSP1/CPU0, DESCR: ASR9K Route Switch Processor with 440G/slot Fabric and 12GB PID: A9K-RSP440-SE, VID: V02, SN: FOC1723N0QCNAME: module 0/0/CPU0, DESCR: 80G Modular Linecard, Service Edge OptimizedPID: A9K-MOD80-SE, VID: V04, SN: FOC1725N0ZRNAME: module 0/0/0, DESCR: ASR 9000 4-port 10GE Modular Port AdapterPID: A9K-MPA-4X10GE, VID: V04, SN: FOC1725N5EBNAME: module mau 0/0/0/0, DESCR: XFPPID: XFP-10GLR-OC192SR , VID: V04 , SN: ONT1734000E 3. IOS-XR打开telnet功能1) 打开telnet功能命令: telnet vrf default ipv4 server max-servers 102) 创建用户名,密码,(需要在admin模式下)ASR 9010(admin-config)#username admin /创建用户名 group root-system /指定用户所属组 group cisco-support /指定用户所属组 secret admin /设置密码4. IOS-XR下怎样关闭和打开某一块线卡电源在某些时候我们需要将某一块板卡关闭或重启。例如插拨板卡或排障。方法如下：（需要在admin的配置模式下）关闭电源：ASR.9010(admin-config)#hw-module power disable location 0/2/CPU0打开电源：ASR.9010(admin-config)#no hw-module power disable location 0/2/CPU0重启板卡：ASR.9010(admin-config)#hw-module location 0/5/CPU0 reload5. 常见的10GE及更高速率模块封装方式有哪些？ SFP XFP SFP+ QSFP CFP6. 机箱背板带宽的英文是什么？Chassis switching capacity.7. 常见的光纤接口有哪些？ 用在什么场合？ST、SC连接器接头常用于一般网络。ST头插入后旋转半周有一卡口固定，缺点是容易折断；SC连接头直接插拔，使用很方便，缺点是容易掉出来；FC连接头一般电信网络采用，有一螺帽拧到适配器上，优点是牢靠、防灰尘，缺点是安装时间稍长。8. 什么是POS接口？POS接口在数据链路层可以使用PPP、帧中继和HDLC协议，在网络层使用IP协议。针对不同的设备，接口传输速率会有所不同。POS（Packet Over SONET/SDH，SONET/SDH上的分组）是一种应用在城域网及广域网中的技术，它具有支持分组数据的优点，如支持IP数据分组。POS将长度可变的数据包直接映射进SONET同步载荷中，使用SONET物理层传输标准，提供了一种高速、可靠、点到点的数据连接。9. POS接口速率分类有哪些？10. 配置POS接口时要注意什么？11. CRS的常见的10GE模块封装种类有哪些？SFPXFPX2XENPACK12. CRS的常见的线卡种类有哪些？13. CRS和GSR的以太口默认是强制还是自动协商？默认是自动协商 14. 7609与A9K的SP与RP的工作区别?A9K的RP进入rommon模式， SP仍可以进行转发。但7609不行。15. 7609上的常见板卡类型有哪些？/c/en/us/products/routers/7600-series-routers/relevant-interfaces-and-modules.htmlCisco 7600 Series Line CardsLong NameShort NameResourcesCisco 7600 Series SPA Interface Processors (SIP)Cisco 7600 Series SPA Interface Processor-200Cisco 7600 SIP-200Data SheetCisco 7600 Series SPA Interface Processor-400Cisco 7600 SIP-400Data SheetCisco 7600 Series/ Catalyst 6500 Series SPA Interface Processor 600Cisco 7600 SIP-600Data SheetPacket Over SONET/SDH (POS)Cisco 2-Port OC-3c/STM-1c POS Shared Port AdapterCisco 2-Port OC-3 POS SPAData SheetCisco 4-Port OC-3c/STM-1c POS Shared Port AdapterCisco 4-Port OC-3 POS SPAData SheetCisco 1-Port OC-12c/STM-4c POS Shared Port AdapterCisco 1-Port OC-12 POS SPAData SheetCisco 1-Port OC-192c/STM-64c POS/RPR Shared Port AdapterCisco 1-Port OC-192 POS/RPR SPAData SheetCisco 7600 Series 2-Port OC-48/STM-16 POS/DPT OSM with 4 GE2-Port OC-48 POS/DPTData SheetCisco 7600 Series 1-Port OC-48/STM-16 SONET/SDH OSM with 4 GE1-Port OC-48 POSData SheetCisco 7600 Series 2-Port OC-12/STM-4 SONET/SDH OSM with 4 GE2-Port OC-12 POSData SheetCisco 7600 Series 4-Port OC-12/STM-4 SONET/SDH OSM with 4 GE4-Port OC-12 POSData SheetCisco 7600 Series 4-Port OC-3/STM-1 SONET/SDH OSM with 4 GE4-Port OC-3 POSData SheetCisco 7600 Series 8-Port OC-3/STM-1 SONET/SDH OSM with 4 GE8-Port OC-3 POSData SheetCisco 7600 Series 16-Port OC-3/STM-1 SONET/SDH OSM with 4 GE16-Port OC-3 POSData SheetEthernetCisco 2-Port Gigabit Ethernet Shared Port AdapterCisco 2-Port GE SPAData SheetCisco 5-Port Gigabit Ethernet Shared Port AdapterCisco 5-Port GE SPAData SheetCisco 10-Port Gigabit Ethernet Shared Port AdapterCisco 10-Port GE SPAData SheetCisco 1-Port 10-Gigabit Ethernet Shared Port AdapterCisco 1-Port 10-GE SPAData SheetCisco 7600 Series 4-Port Gigabit Ethernet WAN + LAN OSMGE-WAN-2Data SheetCisco 7600 Series / Catalyst 6500 Series 4-Port 10 Gigabit Ethernet ModuleCisco 4-Port 10GEData SheetCisco 7600 Series Ethernet Services 20 Gbps Line Card, 2-Port 10GEES202-Port 10GEData SheetCisco 7600 Series Ethernet Services 20 Gbps Line Card, 20-Port GEES2020-Port GEData SheetCisco 7600 Series / Catalyst 6500 Series 10/100 & 10/100/1000 Ethernet Interface Modules10/100 & 10/100/1000Data SheetCisco 7600 Series / Catalyst 6500 Series 10 Gigabit Ethernet Interface Modules10 Gigabit EthernetData SheetDynamic Packet Transport/Resilient Packet Ring (DPT/RPR)Cisco 7600 Series 2-Port OC-48/STM-16 POS/DPT OSM with 4 GE2-Port OC-48 POS/DPTData SheetCircuit Emulation and Channelized ATMCisco 1-Port Channelized OC-3/STM-1 Circuit Emulation Over Packet and Channelized ATM Shared Port AdapterCisco 1-Port Channelized OC3/STM-1CE-ATM SPAData SheetCisco 2-Port Channelized T3/E3 Circuit Emulation over Packet (CEoP) and Channelized ATM Shared Port AdapterCisco 2-Port CH T3/E3 CEoP ATM SPAData SheetCisco 24-Port Channelized T1/E1/J1 Circuit Emulation Over Packet and Channelized ATM Shared Port AdapterCisco 24 Port CH T1/E1 CEoP ATM SPAData SheetSerial/ChannelizedCisco 4-Port Serial Shared Port AdapterCisco 4-Port Serial SPA Data SheetData SheetCisco 8-Port Channelized T1/E1 Shared Port AdapterCisco 8-Port Channelized T1/E1 SPAData SheetCisco 2-Port Channelized T3 (DS-0) Shared Port AdapterCisco 2-Port Channelized T3 SPAData SheetCisco 4-Port Channelized T3 (DS-0) Shared Port AdapterCisco 4-Port Channelized T3 SPAData SheetCisco 2-Port Clear Channel T3/E3 Shared Port AdapterCisco 2-Port Clear Channel T3/E3 SPAData SheetCisco 4-Port Clear Channel T3/E3 Shared Port AdapterCisco 4-Port Clear Channel T3/E3 SPAData SheetCisco 7600 Series 1-Port ChOC-12/CHSTM-4 OSM to T3/E3 with 4 GE1-Port ChOC-12 to DS3Data SheetCisco 7600 Series 1-Port ChOC-12/CHSTM-4 OSM to DS0 with 4 GE1-Port ChOC-12 to DS0Data SheetCisco 7600 Series 12-Port Channelized T3 OSM to DS012-Port CT3 to DS0Data SheetAsynchronous Transfer Mode (ATM)Cisco 2-Port OC-3c/STM-1c ATM Shared Port AdapterCisco 2-Port OC-3 ATM SPAData SheetCisco 4-Port OC-3c/STM-1c ATM Shared Port AdapterCisco 4-Port OC-3 ATM SPAData SheetCisco 1-Port OC-12c/STM-4c ATM Shared Port AdapterCisco 1-Port OC-12 ATM SPAData SheetOC48-C/STM-16C ATM Shared Port AdapterCisco 1-Port OC48 ATM SPAData SheetCisco 7600 Series 2-Port OC-12/STM-4 ATM OSM with 4 GE2-Port OC-12 ATMData SheetServices ModuleCisco 7600 Series Session Border ControllerSBCData SheetCisco 7600 Series/Catalyst 6500 Series IPSec VPN Shared Port AdapterCisco IPSec VPN SPAData SheetCisco 7600 Series/Catalyst 6500 Series Wireless Services ModuleCisco WiSMData SheetCisco 7600 Series / Catalyst 6500 Series WebVPN Services ModuleCisco WebVPNData SheetCisco 7600 Series / Catalyst 6500 Series Anomaly Guard ModuleCisco AGMData SheetCisco 7600 Series / Catalyst 6500 Series Traffic Anomaly Detector ModuleCisco TADMData SheetFlexWAN ModuleCisco 7600 Series / Catalyst 6500 Series FlexWAN ModuleFlexWANData SheetCisco 7600 Series / Catalyst 6500 Series Enhanced FlexWAN ModuleEnhanced FlexWANData SheetForwarding EnginesCisco 7600 Series / Catalyst 6500 Series Supervisor 32Sup 32Data SheetCisco 7600 Series / Catalyst 6500 Series Supervisor Engine 720-3 BXLSup 720-3 BXLData SheetCisco 7600 Series Route Switch Processor 720RSP720Data SheetCisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet UplinksRSP 720-10GEData Sheet16. SPA板卡类型怎样切换？SPA卡分2种类型SPA-1X10GE-WL-V2SPA-1X10GE-L-V2RP/0/RP0/CPU0:SH-SH-MS-CR-1.MAN#sh inventory 0/4/* NAME: 0/4/0, DESCR: Cisco 1-Port 10GE LAN/WAN-PHY Shared Port AdapterPID: SPA-1X10GE-WL-V2 , VID: V01, SN: SAL1628GB4VNAME: 0/4/5, DESCR: Cisco 1-Port 10GE LAN-PHY Shared Port AdapterPID: SPA-1X10GE-L-V2 , VID: V02, SN: JAE15310I9K区别：SPA-1X10GE-WL-V2是兼容用于wan和lan的，默认方式下是属于wan模式，所以和SPA-1X10GE-L-V2默认对接会失败。现象：两端收发光正常，但接口的line protocol一直显示down。RP/0/RP0/CPU0:SH-SH-MS-CR-1.MAN#sh inter ten 0/4/2/0TenGigE0/4/2/0 is down, line protocol is down 解决方法：将SPA-1X10GE-WL-V2改为lan模式。强制改为L 模式RP/0/RP0/CPU0:SH-SH-MS-CR-1.MAN(config)#controller wanphy 0/4/2/0 lanmode on!RP/0/RP0/CPU0:SH-SH-MS-CR-1.MAN(config)#commit LC/0/4/CPU0:Jul 17 16:36:27.105 : spa_xge_v2_wan(2)308: %L2-SPA_ETHER-2-MODE_CHANGE : To complete the mode change the SPA must be power-cycled. 需要重启板卡。RP/0/RP0/CPU0:SH-SH-MS-CR-1.MAN#hw-module subslot 0/4/2 reload重启完成后，检查配置RP/0/RP0/CPU0:SH-SH-MS-CR-1.MAN#sh run controller wanphy 0/4/2/0Wed Jul 17 16:38:02.776 Beijingcontroller wanphy0/4/2/0 lanmode on17. 100G-CFP接口怎样进入?RP/0/RP0/CPU0:SH-SH-MS-CR-1.MAN(config-if)#exitRP/0/RP0/CPU0:SH-SH-MS-CR-1.MAN(config)#int hundredGigE 4/1/0/0RP/0/RP0/CPU0:SH-SH-MS-CR-1.MAN#sh int hundredGigE 4/1/0/0Tue Oct 15 14:15:02.928 BeijingHundredGigE4/1/0/0 is administratively down, line protocol is administratively down Interface state transitions: 0 Hardware is HundredGigE, address is acf2.c54b.9976 (bia acf2.c54b.9976) Internet address is Unknown MTU 1514 bytes, BW 100000000 Kbit (Max: 100000000 Kbit) reliability 255/255, txload 0/255, rxload 0/255 Encapsulation ARPA, Full-duplex, 100000Mb/s, LR4, link type is force-up output flow control is off, input flow control is off loopback not set, ARP type ARPA, ARP timeout 04:00:00 Last input never, output never18. CRS与ME60-8之间10G端口用WAN模式对接失败原因? 温州城域网CRS与ME60-8之间10G端口用WAN模式对接时，CRS侧端口不能UP问题今天已解决。通过cisco TAC排查，发现为plop告警导致端口不能UP ，具体解释如下： The enhancement request is to add CLI to allow the user to disable (mask) the P-LOP alarm which induces a down state when the RX S1S0 bits are set in all STSs to a value other than 0. This feature will provide a functional work around for a situation where remote equipment that may not have the capability to set their S1S0 TX bits to 0, and is directly connected to the 8x10GE card will induce a P-LOP, and the link will be down.An additional reason which necessitates this CLI, is the 1x10GE SPA does NOT transition to down when the S1S0 bitts are set to a value other than 0.The CLI to mask PLOP alarms is following:需要执行以下命令：controller wanphy x/x/x/x mask-alarm plop19. CRS上的14口万兆板卡怎样切换wanmode与lanmode?Wanmode与Lanmode的区别RP/0/RP0/CPU0:CRS-BR-1.MAN(config)#controller wanphy 0/1/0/0 ? lanmode Configure Lan Mode On/Off report Configure WANPHY SF/SD-BER alarm reporting threshold Configure WANPHY SF/SD BER threshold values wanmode Configure Wan Mode On/Off20. ASR9K更换板卡后，这块板卡的license需要重新申请吗？不需要。解释：1) A9K的License是根据机框号申请的，与板卡没有绑定2) License是分配到指定槽位的，只是将 License资源分配给板卡，本身没有绑定关系21. 10GE XFP模块以太与POS对应关系?EthernetPOSLRSRERIRZRLR22. ASR9K的license申请及安装分配方法是什么？1) 思科官网申请：根据PAK和机框SN号2) A9K上添加license（可使用tftp 或FTP方式）3) A9K上将license资源分配给相应槽位4) 激活板卡的License以下是2，3，4步聚的操作示例：Router(admin)#license add t45/auto/tftplic/FOX1602GSK3_1301150924430090.liccommitRouter(admin-config)#license A9K-36X10G-AIP-SE location 0/3/CPU0Router(admin-config)#commitRouter(config)# interface tenGigE 0/3/0/0Router(config-if)#vrf licenseRouter(config-if)#commit确认License状态show license23. 思科官司网申请License时的Product ID怎样找到？如下图：在申请license时需要提供 Product ID Serial Number OperationID获得方法：设备上show license udi （需要在admin模式下）24. 在激活A9K的License时出现错误是什么原因？License安装后，进行激活ASR.9010(config)#int ten 0/0/0/0ASR.9010(config-if)#vrf licenseASR.9010(config-if)#commit但commit时提交失败，提示如下：Mon Jun 16 10:53:35.972 GMT% Failed to commit one or more configuration items during a pseudo-atomic operation. All changes made have been reverted. Please issue show configuration failed from this session to view the errors查看错误原因,显示如下:ASR.9010(config-if)#show configuration failed Mon Jun 16 10:53:55.161 GMT! SEMANTIC ERRORS: This configuration was rejected by ! the system due to semantic errors. The individual ! errors with each failed configuration command can be ! found erface TenGigE0/0/0/0 vrf license!% RSI detected the fatal condition The interfaces numbered and unnumbered IPv4/IPv6 addresses must be removed prior to changing or deleting the VRF!大意是:因为接口下有IP地址，所以提交失败。解决方法：删除接口下的IP地址，或找另一个空接口进行激活。本次案例中原来使用TenGigE0/0/0/0进行激活，但此接口为到核心的上连接口，不能删除接口下的IP，所以找到板卡上的另1个空接口TenGigE0/0/0/3，在TenGigE0/0/0/3下激活License正常。ASR.9010(config)# int ten 0/0/0/3ASR.9010(config-if)#vrf licenseASR.9010(config-if)#commitMon Jun 16 10:54:45.821 GMTASR.9010(config-if)#25. IOS升级IOS-XR时需要注意什么？*感谢付兄，付大湿，致敬*1.MTU： IOS XR的MTU(ip mtu)包括2层头部 IOS的MTU(ip mtu)不包括2层头部 如果都使用默认的MTU两端是可以匹配的(IOS是1500,IOS XR是1514或1504) 如果是手动配置的，IOS XR要比IOS+14(ethernet) 比IOS+4(PPP/HDLC)2.POS IOS XR默认开启了scrambling特性 IOS默认是关闭的，如果对端设备关闭了的话，需要手动关闭 controller SONET0/0/1/3 path scrambling disable3. MPLS VPN option B/C 在IOS XR中需要在ASBR上手动敲一条去往对端直连接口的/32位主机路由 在IOS中是默认产生的 router static address-family ipv4 unicast 2/32 GigabitEthernet0/1/0/0 description HRB 2/32 POS0/0/1/0 description MDJ 6/32 POS0/0/1/1 description DQ 0/32 POS0/0/2/0 description HH 02/32 POS0/0/1/2 description HG 26/32 POS0/0/1/3 description SYS 62/32 POS0/0/2/1 description JGDQ 知识更新：Ethernet互联需要手动配置,POS互联会像IOS一样自动生成/32路由 26. A9K的交换矩阵在哪里？为什么没有像CRS的MSC卡？27. A9K的常见板卡有哪些？来源：Cisco ASR 9000 Transceiver Modules - Line Card Support Data Sheet28. 思科的SFP+模块有哪些分类？来源：Cisco ASR 9000 Transceiver Modules - Line Card Support Data Sheet29. 尾纤中的OM2，OM3是什么含义？通常听到的OMx（x为1234） 是怎么回事？ 那是因为OM1为常规62.5/125um、OM2为常规50/125um、OM3(50/125,万兆多模光纤，有OM3/150,OM3/300)、OM4（OM3的升级版，行业将其归类为OM4/550），因为OM3与OM4区别不那么明显，所以有时有些人也将OM4/550光纤叫成OM3/550光纤。那么，OM1OM4究竟有时根本的区别呢？首先，传统的OM1和OM2多模光纤从标准上和设计上均以LED（Light Emitting Diode 发光二极管）方式为基础光源，而OM3和OM4则在OM2的基础上进行优化，使其同时适用于光源为LD（Laser Diode激光二极管）的传输，与OM1、OM2相比，OM3具有更高的传输速率及带宽，所以称为优化型多模光纤或万兆多模光纤，而OM4在OM3的基础上进行再优化，具备更佳的性能 。30. 更换设备板卡的流程先将板卡power-off，再更换。31. 10GE模块有强制模式吗？没有。 只有GE模块才有强制千兆模式的说法。32. A9K 特定版本对BVI接口的BUG？Version 4.2.1中如果BVI手工关闭后将无法通过no shutdown打开。只能删除BVI接口再重建。Cisco IOS XR Software, Version 4.2.1DefaultCopyright (c) 2012 by Cisco Systems, Inc.ROM: System Bootstrap, Version 1.06(20120210:003513) ASR9K ROMMON, 33. 7600-ES+4TG 和 6704 这2种板卡的区别。 这两块都是65/76上的4口万兆板卡。1) 接口类型不同7600-ES+4TG模块类型：XFP6704模块类型：XENPACK2)ES板卡拥有非常强悍的QoS和各种VPN的功能性（拥有IOS能支持的所有feature）。价格也是6704的几倍。34. c/s架构和b/s架构的区别C/S 架构C/S 架构是一种典型的两层架构，其全程是Client/Server，即客户端服务器端架构，其客户端包含一个或多个在用户的电脑上运行的程序，而服务器端有两种，一种是数据库服务器端，客户端通过数据库连接访问服务器端的数据；另一种是Socket服务器端，服务器端