LINUX PLIP MINI-HOWTO: FAQ.

7. FAQ.

Ayto to tmhma 8a prospa8hsei na lusei ta problhmata sas. Ean exete perissoteres erwthseis, niwste eleu8eroi na moy steilete email opotedhpote.

Lambanw ta parakatw mynhmata kata thn ekkinhsh (h otan fortwnw to plip module):
SIOCSIFADDR: No such device SIOCADDRT: Network is unreachable
kai otan prospa8w na sthsw th sundesh opws grafetai parapanw, janapairnw mynhmata la8oys opws:
SIOCSIFADDR: No such device SIOCSIFDSTADDR: No such device SIOCADDRT: Network is unreachable mount clntudp_create: RPC: Port Mapper failure - RPC: Unable to send
- O pyrhnas, gia kapoio logo, den exei energopoihmenh yposthrijh PLIP. Ayto 8a mporouse na ginetai logw:
  - Den apanthsate nai sto "PLIP support?" kata th ru8mish toy pyrhna.
  - Apanthsate nai sto "Printer support?" kata th ru8mish toy pyrhna.
  - Etoimasate to PLIP ws module, opote prepei na to fortwsete.
  - Xrhsimopoieite la8os 8ura, px gracate plip1 anti gia plip0.
Yparxei tropos na yposthrix8oun ta PLIP kai LP, ektos apo modules, isws me duo parallhles 8ures;
- Nai, mexri stigmhs duo tropoi, poy perigrafontai sto "Pros8hkes gia na exete PLIP kai LP mazi":
  - Mporeite na xrhsimopoihsete thn pros8hkh gia na exete yposthrijh toy pyrhna kai gia ta duo.
  - Mporeite na xrhsimopoihsete thn pros8hkh gia na exete yposthrijh toy pyrhna se mia parallhlh 8ura gia to PLIP kai se allh gia to LP.
Dhmiourghsa ena script poy syndeei toys 2 ypologistes. H sundesh ginetai aytomata apo to rc.inet2, opoy kalw to script poy dhmioyrgei th sundesh kai jekina to NFS. O ypologisths "two" prosarta merikous apo toys katalogoys toy "one". Exw pros8esei tis swstes entoles sto /etc/fstab toy "two". Ean ekkinhsw to "two" otan to "one" einai kleisto, to "two" stamata gia merika lepta sto "mounting remote file systems...".
- Ayto symbainei epeidh o "two" perimenei na prosarthsei ta arxeia toy "one", alla efoson o "one" de leitoyrgei prepei na perimenete mexri o "two" na bare8ei na perimenei. Gia na to apofugete prepei:
  - Afaireste thn entolh apo to rc.inet2 poy prosarta ta apomakrysmena arxeia
  - Afaireste apo to /etc/fstab toy two tis eggrafes twn apomakrysmenwn systhmatwn arxeiwn kai prosarthste ta xeirokinhta otan ta xreiasteite.
  - Mia kaluterh lush einai o two na briskei an o one leitoyrgei kai tote na prosarthsei toys katalogoys. Ayto mporei na ginei metatrepontas thn mount entolh sto rc.d (h opoy allou brisketai) me ta parakatw:
```
     if ping -c 5 one ; then
       mount one:/.....
     fi
```
H sundesh moy doyleuei alla to ping apotygxanei. Lambanw to parakatw munhma apo ton pyrhna:
plip1: timed out (1, 89)
h paromoia mynhmata.
- Ayto shmainei oti "h dikh sas pleyra ths sundeshs" doyleuei, to mhxanhma sas stelnei to shma alla h "allh pleyra" den apanta h den perimenei sta swsta IRQ/IO dieu8ynsh. Ayto einai to pio koino problhma kai, etsi, exei polles aities, synh8ws kakh kalwdiwsh h la8os IRQ kai/h IO diey8unseis. Ta la8os IRQ einai h phgh anw twn 60% twn problhmatwn, opote einai polu pi8anon allazontas to na ly8ei kai to problhma. Mia leptomerhs lista pi8anwn problhmatwn:
  - To kalwdio den einai syndemeno swsta h einai xalasmeno h kakoftiagmeno. Elegjte to, an einai dynaton, metaju dyo Linux ypologistwn opoy hdh doyleuei to PLIP. Ean ayto den einai dynaton tote dokimaste to toylaxiston me ena tester. To gegonos oti to kalwdio doulece/den doulece sto DOS/Win95 einai enas kalos/kakos oiwnos alla den einai apodeijh.
  - Sthn "allh pleyra" de leitoyrgei to PLIP.
  - Eiste syndemenoi me ena forhto me mh kanonikh parallhlh 8ura, deite parakatw.
  - Exete mia polu fthnh parallhlh 8ura poy einai mia aplh 8ura "ektypwth" opote den einai dynaton na stelnete kai na lambanete.
  - H parallhlh 8ura sas den einai ry8mismenh (toylaxiston) ws bi-directional. Dior8wste to sto BIOS. Proxwrhmenes epiloges opws EPP kai ECP einai katallhles.
  - Oi parallhles 8ures exoyn diaforetiko IRQ, opote 8a prepei na fortwsete to plip module (h to lp module) me diaforetiko IRQ. Phgainete pisw sto kefalaio "Energopoiwntas thn sundesh" kai epilejte diaforetiko IRQ.
  - Kapoia allh syskeyh xrhsimopoiei to IRQ (poy synh8ws einai 7), mallon h karta hxoy. Mhn empisteueste programmata toy DOS opws to MSD, anti8eta prospa8hste na fortwsete to plip module me diaforetiko IRQ.
Ebala to swsto IRQ kai IO dieu8ynsh alla pali de doyleuei. Pairnw tis diey8unseis apo to MSD.
- Moy anafer8hke oti to MSD dinei la8os diey8unseis. Dokimaste ayto to programma: http://www.cs.caltech.edu/ huny/para13.zip.
H sundesh moy doyleuei kai to ping epishs. Merikes fores pairnw to parakatw munhma apo ton pyrhna:
plip1: timed out (1, 89)
h paromoia mynhmata.
- Ayto shmainei oti h allh pleyra den apanthse entos enos xronikou orioy. An ola doyleuoyn swsta mporeite na agnohsete tetoia mynhmata: synh8ws shmainei oti h allh pleyra einai polu pio argh apo th dikh sas, eite logw ejoplismou eite logw fortioy. Mporeite na ry8misete to PLIP me thn entolh plipconfig.
Exw egkatasthsei to PLIP alla otan xrhsimopoiw to ping exw 100% apwleia dedomenwn. Exw syndesei ton ypologisth moy me ena forhto.
- Oi parallhles 8ures merikwn forhtwn den kanoyn gia PLIP, epeidh einai aples 8ures ektypwth, dhladh mporoun mono na metadidoyn dedomena alla oxi kai na lambanoyn. Mexri stigmhs den jerw an kapoios katafere na tis kanei na doylecoyn. H monh elpida einai:
  - Koitajte tis ry8miseis toy forhtou, isws yparxei tropos na ry8misete th 8ura ws parallhlh anti gia 8ura ektypwth. Synh8ws ayto onomazetai "parallel enhanced mode".
  - Dokimaste plip mode 0. Den jerw pws na to kanete kai/h an doyleuei h an einai akoma dia8esimo stoys teleytaioys pyrhnes.
Ti taxuthtes mporw na epituxw me to PLIP?
- Ayth einai mia duskolh erwthsh gia na apanth8ei, afou ejartatai apo POLLOYS paragontes poy ephreazoyn drastika thn apodosh:
  - Thn taxuthta toy epejergasth kai apo tis dyo pleyres ths sundeshs.
  - Ton tupo ths parallhlhs 8uras kai tis ry8miseis.
  - To fortio toy ypologisth.
  - Gia ti xrhsimopoieitai to PLIP.
  Xontrika, 8a prepei na epituxete peripoy 40kbytes/deyterolepto, polu kalutera apo seiriakh sundesh kai konta se kartes ethernet xamhlhs apodoshs.
Ti symbainei an xreiazomai na shkwnw kai na kleinw th sundesh plip1 polles fores me to ifconfig;
- Moy fainetai oti prepei na pros8esete thn parametro -arp sto ifconfig, ektos apo thn prwth fora meta apo ka8e ekkinhsh. Egw den to xreiazomai alla kapoios mporei na to xreiastei.

Diabasa tis IP diey8unseis poy anhkoyn se apomonwmena diktya kai ta 200.0.0.1 kai 200.0.0.2 poy xrhsimopoieis einai ejw apo aytes. De 8a eprepe na allajoyn;

Nai, prepei. Alla opws anefera sthn arxh, dialeja aytes tis diey8unseis gia thn aplothta toys. Eiste eleu8eroi na tis allajete opws 8elete. Ena apospasma apo to NET-2-HOWTO:


  
    RFC1597 has specifically reserved some IP addresses for private
    networks.  You should use these as they prevent anything nasty
    happening if you accidentally get connected to the Internet. The
    addresses reserved are:

      10.0.0.0        -   10.255.255.255
      172.16.0.0      -   172.31.255.255
      192.168.0.0     -   192.168.255.255

Yparxei tropos na ry8misw tis parametroys toy PLIP xwris na peirajw ton phgaio kwdika;
- Nai yparxei. Dokimaste thn entolh /sbin/plipconfig. Deite th man selida ths gia perissoteres plhrofories.
Trexw Debian GNU/Linux kai, katw apo to Debian, ta arxeia /etc/rc.d/rc.inet1 kai 2 den yparxoyn. Poy 8a gracw tis entoles gia to plip.
- Sto Debian GNU/Linux prepei na koitajete to /etc/init.d/network, opoy 8a balete oles tis entoles poy 8a phgainan kanonika sta rc.inet1 kai 2.
Exw merika problhmata syndeontas dyo ypologistes me to PLIP. O prwtos exei thn teleytaia ekdosh toy pyrhna enw o deuteros exei PLIP ekdosh 1.0.x: yparxei problhma;
- Nai, einai polu kalutera, an einai dynaton na yparxei h idia ekdosh PLIP kai stis dyo akres. Sto plip.c einai grammeno oti to PLIP de mporei na leitoyrghsei me 1.0.xx PLIP.
Wraia, to PLIP doyleuei me 4 bits, ti ginetai me to PLIP twn 8 bits poy diabasa sthn tekmhriwsh toy pyrhna; Nomizw oti legetai Mode 1.
- Ayto to mini-HOWTO einai gia tis ry8miseis. Gia texnikes plhrofories deite ta /usr/src/linux/drivers/net/README*.PLIP h epikoinwnhste me ton syggrafea. To mono poy jerw einai: to kanoniko PLIP xrhsimopoiei "null printer" kalwdia kai to Mode 0 (mhn to mperdeuete me to plip0, poy einai onoma sundeshs) xrhsimopoiei 4 bits. To Mode 1 xrhsimopoiei 8 bits kai 8a prepei na einai hdh dia8esimo alla 8a xreiastei ena eidika ftiagmeno kalwdio kai doyleuei mono metaju dyo ypologistwn Linux. Den jerw, efoson exete to kalwdio, pws na kanete sundesh PLIP se Mode 1. Ean kapoios jerei, parakalw na moy pei ki emena.

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