
Bridging mini-HOWTO, v1.03 by Chris Cole                    Aug. 23, 1996
Any suggestions/corrections welcome at:          chris@polymer.uakron.edu 
 ()ʡ <shibata@opost1.netspace.or.jp> Jan. 5, 1997

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1)Bridge Configꡧ

	shadow.cabi.net/pub/Linux/BRCFG.tgz
ftpǻäƤޤ

2)Multiple ethernet HOWTOꤷɤɤߤޤ:

	sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini/Multiple-Ethernet
ftpǻäƤޤ
<>
JFǤ
	http://jf.gee.kyoto-u.ac.jp/JF/JF-ftp/euc/Multiple-Ethernet.euc
ʤɤˤޤ
</>

3)  ʣΥͥåȥ(Network Interface Card:NIC)ưᡢ
    ιԤ/etc/lilo.confɲäliloƼ¹Ԥޤ

	append = "ether=0,0,eth1"

    ⤷3NICǥ֥åΤǤСȤޤ

	append = "ether=0,0,eth1 ether=0,0,eth2"

    4ʾNICȤΤǤСetherλɲäФǤ礦
    ɸLinux KernelưȤƤϡ1NICФ줿Ǥʾ
    ФϹԤޤ󡣾嵭1ܤNICФ줿³NIC
    ФԤ碌뤿λǤ

    ¾ˤ⡢֡ȻΥѥ᡼(NIC2λ)
    Τ褦ˤޤ
<>
kernel̾linuxξΤ褦ǤĶˤۤʤɤؤޤ礦
</>

	linux ether=0,0,eth1

    ⤷ϡNIC3ξϡΤ褦ˤʤޤ

	linux ether=0,0,eth1 ether=0,0,eth2

4)  BRIDGINGͭ(Y)פˤơkernelκƹۤԤޤ

5)  ֥̾åIP addressʤΤǤ뤳Ȥޤ
    ̤IP addressɬפȤޤ

    RedHatƥξˡIP address֥åȤưƤNIC
    ˤ
    /etc/sysconfig/network-scripts/ǥ쥯ȥifcfg-lo0Ȥե
    ifcfg-eth0  ifcfg-eth1 ˥ԡޤ
    ĤΥե'DEVICE=lo'Ƚ񤫤ƤԤõơ줾
    'DEVICE=eth0'  'DEVICE=eth1'ѹޤ
    ¾ΥѥåǤϤȤϤäȰ㤦Ȼפޤɬפ˱
    äƤ

<>
SlackwareǤϡ/etc/rc.d/rc.inet1Խ뤳ȤˤʤȻפޤ
</>

    ⤷3ʾNICǥ֥åΤǤСƱͤŬڤ
    ѹƤ

6)  ֡Ȥޤkernelϥ֥åǽ򥵥ݡȤƤꡢ
    ܤƤʣNICIP addressäƤʤϤǤ

7)  ƥबƵư顢NIC̵Ʃᡧpromiscuousץ⡼ɤˤޤ
    Υ⡼ɤǤϤ٤ƤΥѥåȤ򤽤줾NICƩᤵޤ

	ifconfig promisc eth0 ; ifconfig promisc eth1

    ξ֤Ǥϥ֥å뤿˳network³줿
    ٤ƤNIC̵Ʃ⡼ɤưƤޤ

8)  brcfgץǥ֥å󥰤ϣΤˤޤ

	brcfg -ena

9)  줾NICǥȥեåۤʤäƤ뤳Ȥǧޤ

	tcpdump -i eth0    (äΥɥǸ)
	tcpdump -i eth1    (̤ΥɥǸ)

10) sniffer(˥åե)tcpdump¾Υޥươۤ
    ֥åȤʬΥƤǧޤ


褯:

Q1) "ioctl(SIOCGIFBR) failed: Package not installed"ȸåФޤ
    Ϥɤ̣Ǥ?

A1) kernelΥ֥åǽͭˤƤޤ󡣥С2.0ʹߤο
    kernelꤷơBRIDGINGͭפˤƥͥƹۤޤ礦

Q2) ֥å¦ΥȤΥޥ󤫤顢ȿ¦ΥȤ
    ޥpingޤ

A2) - 'brcfg -ena'Ȥäơ֥åǽͭˤޤ?
      (brcfg'bridging is ENABLED'ɽϤǤ)
    - 줾NIC̵Ʃ⡼ɡפˤޤ?
      ('ifconfig' ǳǧƸƤ'PROMISC'ե饰줾
       NICɽϤǤ)
    - ⤷ʣΥǥ(10-B5/2/T)NICξϡΤ
      ͭˤƤޤ? NICźդƤץ
      ľޤ礦

Q3) ֥åtelnet/ftpǤʤʤ? 

A3) ֥åΤNICˤIP addressդƤʤǤ
    ֥åϥͥåȥƩŪʤΤǤ顣

Q4) routing(ϩ)ˤäƲ򤹤ФǤ礦?

A4) ⤤ޤ kernelΥ֥å˴ؤʬǤ٤Ƥηϩ
    ؽǽ¸Ƥޤ֥åˤäƸФ줿Eternet
    address򸫤ˤbrcfgץǥХå⡼ɤưޤ

	brcfg -deb

Q5) ֥åưƤޤʤ'traceroute'ǥ֥åϥѥ
    ʬȤƸʤΤǤ礦?

A5) Υ֥åΰ̣礤顢tracerouteǤϥ֥åѥΰʬ
    ȤƸ٤ǤϤޤ
    ֥åϥͥåȥƩŪʡʥ֥ʤɡˤƱͤǤ顣

Q6) kernelƹۻIP_FORWARDͭפˤɬפޤ? 

A6) ֥åǽ¸kernelΥɤϥѥåȤ
    ̤ƤǤIP_FORWARDϤ줾NICIP addressդ
    ȥȤư뤿ΤΤǤ

Q7) ʤbrcfgˤä֤ݡ1ȥݡ2Υͥå(MAC)ɥ쥹
    ƱʤΤǤ?  ۤʤϤǤϤʤΤǤ?

A7) ֥åȤưƤ뤹٤ƤΥݡȤϥ֥å
    ץˤäƱͥåȥɥ쥹꿶ޤ

