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Jumbo frame là gì

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sumuoi.mobi - AdminPro » CHUYÊN ĐỀ» Máy Chủ và Phần Cứng Mạng (IBM, HP, SUPERMICRO, INTEL, CISCO, ROUTER...) » cấu hình MTU với Jumbo Frame mang đến switch Dell Force10 S4810


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cấu hình MTU và Jumbo Frame mang đến switch Dell Force10 S4810https://www.force10networks.com/CSPo...-settings.aspxAdjusting MTU & Configuring Jumbo Frame Settings Overview This tech tip explains the function of different Maximum Transmission Unit (MTU) settings in FTOS. Also, it provides an example of configuring jumbo frames & adjusting MTU settings. MTU and IP MTU Settings FTOS uses: MTU settings khổng lồ determine whether or not to fragment a packetIP MTU settings to set the packet fragment kích cỡ The difference between the MTU and IPhường. MTU settings should be equal to lớn the Ethernet header and footer size (18 bytes for untagged ports & 22 bytes for tagged ports). FTOS automatically sets the IP MTU equal lớn the MTU less 18 bytes (IP.. MTU = MTU – 18 bytes) when you configure a MTU setting. If you use a tagged port, the user needs to phối the IPhường MTU equal khổng lồ the MTU less 22 bytes (IP MTU = MTU – 22 bytes). Port Type IP MTU Calculation Untagged Port IPhường. MTU = MTU – 18 bytes Tagged Port IP MTU = MTU – 22 bytes Example If you set the MTU khổng lồ 9000 for an untagged port, you should phối the IPhường MTU should be phối to lớn 8982 (MTU – 18 bytes). (FTOS configures this automatically.) If MTU is mix to 9000 for a tagged port, the IP MTU should be set lớn 8978 (MTU – 22 bytes). (You must configure this value.) For port channel & VLAN interfaces, all member ports should have the same MTU và IPhường MTU values. If you configure the MTU & IP MTU on a port-channel or VLAN interface, FTOS does not configure MTU and IPhường MTU on the thành viên ports automatically. You must configure them for the individual members. If the VLAN or port channel is a Layer 3 interface (if you assign the IP.. address), then you should configure the MTU and IPhường MTU on those interfaces. The OSPF, BGP, IS-IS and the IPhường Staông xã use these configured values. Devices on the same physical subnet should have sầu the same MTU & IPhường MTU settings lớn ensure the proper operation of the protocol. For Jumbo frame purposes, FTOS sets an interface’s Maximum Receive sầu Unit (MRU) kích thước equal khổng lồ the MTU value you configured for the interface (MRU = MTU). Force10 TAC is aware that other vendors implement MTU differently. For more information about your situation, please consult your vendor’s documentation. Example Configuration Here is a sample configuration you can use to phối up MTU and IPhường MTU settings khổng lồ work with Jumbo frames: 1) Allcurrently shipping Force10line cardsvà RPMs supportJumboframes. On the E-Series và C-Series, you can verify that your RPMs and line cards support Jumbo frames by using the show linecardshow rpm commands to lớn inspect the Jumbo Capable field for the value "yes", as shown below. On the S-Series, see the Jumbo Capable field in the output of the command show system stack-unit. Force10# show rpm -- RPM thẻ 0 -- Status : active Next Boot : online Card Type : RPM - Route Processor Module (LC-EF-RPM) Hardware Rev : 2.0 Num Ports : 1 Up Time : 36 min, 51 sec Last Restart : remix FTOS Version : 6.2.1.0 Jumbo Capable : yes ------------------ 2) Allcurrently shipping Force10 chassis support Jumboframes. Some E-Series using EtherScale architecture do not by default. To kiểm tra if your E-Series is Jumbo-enabled, use the show chassis command: Force10# show chassis-- Manufacturing Info -- Chassis Type : E1200Chassis Mode : TeraScale ------------------ Your Chassis Mode must be set to anything but “Non Jumbo”. Note: You can also inspect the Jumbo capability of the RPMs in the output of this comm&. 3) Chechồng current MTU settings: Force10# show interfaces gigabitethernet0/0GigabitEthernet 0/0 is down, line protocol is down Hardware is Force10Eth, address is 00:01:e8:05:ae:e5 Internet address is not phối MTU 1554 bytes, IP.. MTU 1500 bytes LineSpeed auto, Mode full duplex ARP.. type: ARPA, ARP. Timeout 04:00:00 4) Configure interface MTU/IP MTU: Force10# configure Force10(conf)# interface gigabitethernet 0/0 Force10(conf-if-gi-0/0)# mtu 9252Force10(conf-if-gi-0/0)# ip mtu 9234 Force10(conf-if-gi-0/0)# show config ! interface GigabitEthernet 0/0no ip addressmtu 9252ip mtu 9234shutdownForce10(conf-if-gi-0/0)#Force10# 5) Verify new settings: Force10#show interfaces gigabitethernet0/0GigabitEthernet 0/0 is down, line protocol is downHardware is Force10Eth, address is 00:01:e8:05:ae:e5Internet address is not setMTU 9252 bytes, IP.. MTU 9234 bytesLineSpeed auto, Mode full duplexARP type: ARPA, ARP Timeout 04:00:00
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