Dell M8024-k инструкция обслуживания

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56

Идти на страницу of

Хорошее руководство по эксплуатации

Законодательство обязывает продавца передать покупателю, вместе с товаром, руководство по эксплуатации Dell M8024-k. Отсутствие инструкции либо неправильная информация, переданная потребителю, составляют основание для рекламации в связи с несоответствием устройства с договором. В законодательстве допускается предоставлении руководства в другой, чем бумажная форме, что, в последнее время, часто используется, предоставляя графическую или электронную форму инструкции Dell M8024-k или обучающее видео для пользователей. Условием остается четкая и понятная форма.

Что такое руководство?

Слово происходит от латинского "instructio", тоесть привести в порядок. Следовательно в инструкции Dell M8024-k можно найти описание этапов поведения. Цель инструкции заключается в облегчении запуска, использования оборудования либо выполнения определенной деятельности. Инструкция является набором информации о предмете/услуге, подсказкой.

К сожалению немного пользователей находит время для чтения инструкций Dell M8024-k, и хорошая инструкция позволяет не только узнать ряд дополнительных функций приобретенного устройства, но и позволяет избежать возникновения большинства поломок.

Из чего должно состоять идеальное руководство по эксплуатации?

Прежде всего в инструкции Dell M8024-k должна находится:
- информация относительно технических данных устройства Dell M8024-k
- название производителя и год производства оборудования Dell M8024-k
- правила обслуживания, настройки и ухода за оборудованием Dell M8024-k
- знаки безопасности и сертификаты, подтверждающие соответствие стандартам

Почему мы не читаем инструкций?

Как правило из-за нехватки времени и уверенности в отдельных функциональностях приобретенных устройств. К сожалению само подсоединение и запуск Dell M8024-k это слишком мало. Инструкция заключает ряд отдельных указаний, касающихся функциональности, принципов безопасности, способов ухода (даже то, какие средства стоит использовать), возможных поломок Dell M8024-k и способов решения проблем, возникающих во время использования. И наконец то, в инструкции можно найти адресные данные сайта Dell, в случае отсутствия эффективности предлагаемых решений. Сейчас очень большой популярностью пользуются инструкции в форме интересных анимаций или видео материалов, которое лучше, чем брошюра воспринимаются пользователем. Такой вид инструкции позволяет пользователю просмотреть весь фильм, не пропуская спецификацию и сложные технические описания Dell M8024-k, как это часто бывает в случае бумажной версии.

Почему стоит читать инструкции?

Прежде всего здесь мы найдем ответы касательно конструкции, возможностей устройства Dell M8024-k, использования отдельных аксессуаров и ряд информации, позволяющей вполне использовать все функции и упрощения.

После удачной покупки оборудования/устройства стоит посвятить несколько минут для ознакомления с каждой частью инструкции Dell M8024-k. Сейчас их старательно готовят или переводят, чтобы они были не только понятными для пользователя, но и чтобы выполняли свою основную информационно-поддерживающую функцию.

Содержание руководства

  • Страница 1

    Author s Network Enabled S olutions Team, Kevin Locklear Contributor Kili Land Deployin g FCoE ( FIP Snoopi ng) on Dell PowerConn ect 10G Sw itches: M8024- k, 8024 and 8024 F A Dell Deploymen t Guide[...]

  • Страница 2

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 2 This document is for informational p u rposes only and may contain typographical er r ors and technical ina c curacies. The content is provided as is, with out express or i mplied war r an t ies o f any kind. © 2011 - 2012 Dell I nc. All rights re served[...]

  • Страница 3

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 3 Contents Introduction ........................................................................................................... 6 Basic Termin ology .................................................................................................... 6 F[...]

  • Страница 4

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 4 Cisco Nexus 5 548UP CLI examp l e .............................................................................. 52 Appendix B - Network Switch V e r s ions ........................................................................... 56 References ........[...]

  • Страница 5

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 5[...]

  • Страница 6

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 6 Introduction The PowerConnect™ M8024 - k, 8024 and 80 24 F switches are n ow DCB/DCBx c apable with a downloadable update . Start ing w ith firmware 4.2, the latest PowerConnect™ 10 Gigabit switches can now be used as an FCoE Transit S witch (FIP S no[...]

  • Страница 7

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 7 PFC Priority Flow Control (PFC) , or Per - Priority Pause i s defined in the IEEE 802.1Qb b standard. PFC i s flow control bas e d on priority s ettings and a d d s ad d itional in f or mation to th e standard pau se frame. The additional f ie lds added t[...]

  • Страница 8

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 8 Configuration s cenarios The following s ections will present very bas ic e x amples of de ploying the 10G switches for FIP Snoopin g and will provide step -by- step e xp l anations of the C LI commands as a guide. The GUI does not cur r e n tly support c[...]

  • Страница 9

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 9 Important notes pri o r to deplo y me nt No Simple Mode Each of the fol lowing scen ar i os in this docu ment assume that the PowerConnect™ 8024 mode l switch being used is in normal Switch Mode (not Simple Mo de) and is using firmwar e version 4. 2. x.[...]

  • Страница 10

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 10 Scenario 1: Depl o yi ng th e Dell PowerCo nnect 8 024 Series F SB in a Cisco 5 000 Series Switch (NPIV ) environment T his first exa mple is a basic , single connection betw een devi ces example using the Dell PowerConnect M8024 -k . This configurat ion[...]

  • Страница 11

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 11 The flowch ar t in Figure 8 is a g e n e r al overvie w of h ow the dep l oyment will oc c ur. This incl u des the basic plann in g that will n e e d t o take place in order for most of the steps in t h e rest of the d ocu ment to fall into place. Genera[...]

  • Страница 12

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 12 Figure 9 is a gr ap h ical repr e se n t ation of how many of the con f iguration p ie ce s ar e considered parallel settings. M os t of the confi g u r at ion will d e p e n d h eavily on con f igurations b e ing complet ed in more than just one place. [...]

  • Страница 13

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 13 Configuring th e Dell PowerConne ct M8024 - k,8024, and 8024F for FIP Sn ooping The Dell PowerConnect 8024 model swit ches wil l mo nit or FIP packets and will establish the proper filtering, an d prioritie s f or the FCoE t r a ffic that is pa ssed thro[...]

  • Страница 14

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 14 Step by Step explanati on of CLI example o Configure – this brings the prompt into the configuration interface o no mode simple – puts switch into n or mal mode o vlan database - moves d o wn into the VLA N dat abase inte r f a ce  vlan 20 – add[...]

  • Страница 15

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 15 o i nterface te1/0/20 – this moves into the inter f a ce te1/0/20 c onfiguration  switchport general pvid 20 – est ab l ishes the nat iv e VLAN as 20, you mu st remove V LA N 1 in order for this to functi on correctly  switchport general allow [...]

  • Страница 16

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 16 Configuration overvie w of Dell PowerConnect M8024 - k Figure 9.[...]

  • Страница 17

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 17 Con figuring the Cisco 5000 se r ies s witch with firmware ver 5.x for a sing le connection from t he Dell PowerConnect M8024 - k or 8024()(F) The CLI comman ds below are nece ssary for an un - configured C isco 5020. The CLI will show ad d it ional line[...]

  • Страница 18

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 18 The follow in g CLI comman ds are necess ary for an un - conf igured Cisc o Ne xus 5548UP or C i sco Nexus 5596. The full CLI will show additional lines that a re either default or can’t be changed and are not added for thi s example. T h e C LI will a[...]

  • Страница 19

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 19 St ep by Step explanati on of the CLI example  Configure – this brings y ou into the con figuration interface . o feature FCOE – enabl e s t h e feature for FC OE as long as the l icensing an d FC modules are installed . o feature NPIV – enables[...]

  • Страница 20

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 20 o Zone name blade1 vsan 2 – this will set the name for your zone (blade1 can be any chosen name); vsan 2 will match t he vsan you have cr e ated.  Member interface fc2/1 - th is adds the fc2/1 in t erface as a me mber of the zo ne.  member pwwn x[...]

  • Страница 21

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 21 M1000e Chassis Manage ment Controller - > Server Ove rview - > Properties -> Figure 13. WWN/MAC inf ormation for Blade Server 3’s “B” fabric CNA port 2 (B 2).[...]

  • Страница 22

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 22 Basic Validat ion f or the Cisco Nex us 5000 series switch configurat ion With connect ions made vi a fiber opti c c able or direct connect cabl e (twin - ax) the basi c c onnectivity on the port between the two switches can be verif ied. These cables or[...]

  • Страница 23

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 23 Check the spanning tree configu r ation. Blocking ports should be understood and when they show in this entry it should be the number expected. Otherwise it could be tha t an unintentional cable loop has been created that will need to be resol ved. Type [...]

  • Страница 24

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 24 With all cables in place between the switches and the FC /FCoE SAN, use the following command s to validate you r configurati on. First check g eneral statu s of the ports, and links by u sin g: SHOW I NTERFA CE ST ATU S Show interface status r esults Fi[...]

  • Страница 25

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 25 With the SHOW SPANNIN G - TREE BLOCKEDPORTS command t he status of po r t s t hat may be impa cted by spanning tree can be checked. This is also a good point to make sure that the spanning - tree behaviors are as expect ed, such as Prior ity, which switc[...]

  • Страница 26

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 26 The follow in g command wi ll show a set of vit al information on the DCBX configuration. T ype: SHOW LLDP DCB X INT ERFACE ALL . The important things to note with this command are that the configuration source sele cted is “True ” and that the conf [...]

  • Страница 27

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 27 The follow in g command wi ll show a set of v it al information on the DCBX configuration. T ype: SHOW LLDP DCB X INT ERFACE TE 1/0/2 0 DETAIL . This command will sh ow more spec if ic detail ab ou t the configuration that has been negotiated between the[...]

  • Страница 28

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 28 Finally , after the se val idation step s , go into the di sk management in t erface of t h e se r v e r . I f the SAN is configured appropriatel y the server w ill have an av ailable LUN t o use for stor age. Basic Troubl eshooting Areas Problem Potenti[...]

  • Страница 29

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 29 Problem Potential Problem Area Potential Fix The VFC entries may no t be present on the Cisco Nexus 5000 series switch Ensure that VFC's are created that will be applicable to the connection. This can be bound to the FCoE- FIP MAC of the CNA or to t[...]

  • Страница 30

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 30 S cenario 2: Configuring Multiple Uplinks into LAG for Cisco N exus 5000 Series Switch ( NPIV ) Environment Multiple port l ink (LAG) configurat ion between swit ches and storage Figure 23.[...]

  • Страница 31

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 31 Configuring the Cisc o Nexus 5000 serie s switch with f irmware ver 5.x for a multiple link LAG (link aggregation) connection at the Top - of - Ra ck. The typical s cenario in a b usiness envir onment cons i st s of more than one connection or uplink. Th[...]

  • Страница 32

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 32 Step by Step explanati on of CLI example (only covering the differences from the single port configuration) o interface vfc1 – selects virtual fc interface vfc1 (vfc1 is an exam ple and can be a different number based on choice at configuration time) ?[...]

  • Страница 33

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 33 Configuring the M80 24 - k,8024, and 80 24F for FIP Snooping This is an exa mple of the nece s sary CLI comm ands for 8024 mo del switche s configure d with two l in k s in a LAG or port - channel uplin k ed to the Cisco 50 20. This prov ides more bandw [...]

  • Страница 34

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 34 Step by Step explanati on of Dell PowerConn ect M8024- k CLI example w ith mult iple port (LAG) uplink ( this only cov ers the differenc es from the single p ort configurati on). o interface te1/0/19 – this moves into the interface te1/0/19 configurati[...]

  • Страница 35

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 35 S cenario 3: Configuring Multiple Uplinks into LAG for Cisco Nexus 5000 Series Switch ( NPV mode) Environme n t Multiple link configuration bet ween switches and storage Figure 26.[...]

  • Страница 36

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 36 Configuring the Cisc o Nexus 5000 seri es switch with firmwa re ver 5.0(3)N2(2a) in NPV mode for a multiple lin k LAG (link aggregation ) connection from t he Dell PowerCo n nect M8024 - k or 8024 ()( F) The typical s cenario in a b usiness envir onment [...]

  • Страница 37

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 37 Step by Step explanati on of CLI example for th e Cisco Nexus 5000 Seri es using NPV (only covering the differences from t he single port c onfiguration) o feature NPV – enables the NPV feature which turns off zoning . T he FC side of the Nexu s 5000 s[...]

  • Страница 38

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 38 F urther notes on ETS / CoS behav ior settings Careful consideration should be taken when establishing the strict priority queues and managing bandwidth re servations. I t FCoE and iSC SI are configu red on the same sw itch and th e se se t tings are use[...]

  • Страница 39

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 39 Updating f irmware NOTE:. Be sure to check the Releas e Notes and any special in structions t h at may have come with new firmwar e updates. It is i mportant t o follow inst ructions foun d in those do cuments if th e y deviate from this white paper. Ste[...]

  • Страница 40

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 40 Perform an ot her show version c ommand to con fir m th at the new fir mware has been downloaded to the switch. Not ice that the firmware was copied in to the inactiv e image for e ach member. The current - active colum n now shows th e same values as th[...]

  • Страница 41

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 41 To validate, l ogin to the s witch and per for m a show version comman d . For the exa mple given the following i s displayed. While downgr ading to a pre v i ous firmw ar e i s supporte d , all features an d f u n ctions that w ere not part of the previ[...]

  • Страница 42

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 42 3. Enter the IP address of the TFTP serve r into the Server Address field, and enter th e name of the Firmware file into the S ource File Name f ield. 4. If not in th e r oot directory of the TFTP serve r, enter th e p at h of the firmware file. 5. Click[...]

  • Страница 43

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 43 Also notice that the switch still has the same Current - Active image as before . 8. Under the Next - Active col umn, select t h e n ew image (i. e . image2) for the sw itch or st ack . 9. Click Apply . The Current - Active colum n should now sh ow the o[...]

  • Страница 44

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 44 Notice that the new firmware (i.e. 4.2.0.4 ) is now the Current - Active image for e ach member. While downgr ading to a pre v i ous firmw ar e i s supporte d , all features an d f u n ctions that w ere not part of the previous firmware will be lost, inc[...]

  • Страница 45

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 45 Appendix A – F ull CLI ex a mpl es M8024 - k CLI example show running - config !Current Configuration: !System Description "PowerConnect M8024 - k, 4.2.1.3, VxWorks 6.6" !System Software Version 4.2.1.3 !Cut- through mode is configured as dis[...]

  • Страница 46

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 46 ! interface Te1/0/2 cos- queue min - bandwidth 0 0 0 50 0 0 0 cos- queue strict 3 shutdown spanning - tree port - priority 0 mtu 2500 switchport mode general switchport general pvid 20 switchport general allowed vlan add 20 switchport general allowed vla[...]

  • Страница 47

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 47 exit ! interface Te1/0/6 cos- queue min - bandwidth 0 0 0 50 0 0 0 cos- queue strict 3 shutdown spanning - tree port - priority 0 mtu 2500 switchport mode general switchport general pvid 20 switchport general allowed vlan add 20 switchport general allowe[...]

  • Страница 48

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 48 lldp dcbx port - role auto - down exit ! interface Te1/0/10 cos- queue min - bandwidth 0 0 0 50 0 0 0 cos- queue strict 3 shutdown spanning - tree port - priority 0 mtu 2500 switchport mode general switchport general pvid 20 switchport general allowed vl[...]

  • Страница 49

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 49 switchport general allowed vlan add 1000 tagged switchport general allowed vlan remove 1 lldp dcbx port - role auto - down exit ! interface Te1/0/14 cos- queue min - bandwidth 0 0 0 50 0 0 0 cos- queue strict 3 shutdown spanning - tree port - priority 0 [...]

  • Страница 50

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 50 mtu 2500 switchport mode general switchport general pvid 20 switchport general allowed vlan add 20 switchport general allowed vlan add 1000 tagged switchport general allowed vlan remove 1 exit ! interface Te1/0/18 cos- queue min - bandwidth 0 0 0 50 0 0 [...]

  • Страница 51

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 51 switchport general allowed vlan add 1000 tagged switchport general allowed vlan remove 1 mtu 2500 fip- snooping port - mode fcf exit ! interface port - channel 3 mtu 2500 exit ! interface port - channel 4 mtu 2500 exit  Skipped port - channel 5 throug[...]

  • Страница 52

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 52 Cisco Nexus 5548 UP CLI example Technet5548 - 1# show running - config !Command: show running - config !Time: Tue Feb 14 22:47:07 2012 version 5.0(3)N2(2a) feature fcoe feature telnet cfs ipv4 distribute feature lacp feature lldp username admin password [...]

  • Страница 53

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 53 vlan 1000 fcoe vsan 2 name FCoE_VLAN vsan database vsan 2 interface port - channel2 switchport mode trunk switchport trunk native vlan 20 switchport trunk allowed vlan 1000 interface vfc3 bind mac - address 14:fe:b5:8e:5b:f2 no shutdown interface vfc4 bi[...]

  • Страница 54

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 54 interface fc1/32 switchport trunk mode on no shutdown interface Ethernet1/1 interface Ethernet1/2 interface Ethernet1/3 interface Ethernet1/4 interface Ethernet1/5 interface Ethernet1/6 interface Ethernet1/7 interface Ethernet1/8 interface Ethernet1/9 in[...]

  • Страница 55

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 55 interface Ethernet1/25 interface Ethernet1/26 switchport mode trunk switchport trunk native vlan 20 switchport trunk allowed vlan 1000 interface Ethernet1/27 switchport mode trunk switchport trunk native vlan 20 switchport trunk allowed vlan 1000 interfa[...]

  • Страница 56

    Deploying FCoE (FIP Snooping) on Dell PowerConnect 10G Switche s: M8024 - k, 8024, and 8024F 56 Appendix B - Network Switch Versions Version info rmation for the ne twork switches us ed in creating t his document are as follows: Switch Firmw are Versions Table 1. Network switch Dell PowerConnect™ M8024k Dell PowerC onnect ™ 8024/8024F C is c o [...]