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[linuxjm/jm.git] / manual / net-tools / draft / man8 / route.8

.\" Japanese Version Copyright (c) 1998 Yoshiki Sugiura
.\"         all rights reserved.
.\" Translated  at Thu Jan 15 22:01:14 JST 1998
.\"         by Yoshiki Sugiura <yoy@mb.kcome.ne.jp>
.\" Updated  at Sat Jan 24 13:41:18 JST 1998
.\"         by Yoshiki Sugiura <yoy@mb.kcome.ne.jp>
.\" Updated Sun Jan 14 22:02:13 JST 2001
.\"         by Yuichi SATO <sato@complex.eng.hokudai.ac.jp>
.\"
.TH ROUTE 8 "2 January 2000" "net-tools" "Linux Programmer's Manual"
.\"O .SH NAME
.SH ̾Á°
.\"O route \- show / manipulate the IP routing table
route \- IP ·ÐÏ©¥Æ¡¼¥Ö¥ë¤Îɽ¼¨/ÀßÄê
.\"O .SH SYNOPSIS
.SH ½ñ¼°
.B route
.RB [ \-CFvnee ]
.TP
.B route 
.RB [ \-v ]
.RB [ \-A
family] 
.B add 
.RB [ \-net | \-host ] 
target 
.RB [ netmask 
Nm] 
.RB [ gw 
Gw] 
.RB [ metric 
N] 
.RB [ mss 
M] 
.RB [ window 
W] 
.RB [ irtt 
I]
.RB [ reject ]
.RB [ mod ]
.RB [ dyn ] 
.RB [ reinstate ] 
.RB [[ dev ] 
If]
.TP
.B route 
.RB [ \-v ] 
.RB [ \-A
family]
.B del 
.RB [ \-net | \-host ] 
target 
.RB [ gw 
Gw] 
.RB [ netmask 
Nm] 
.RB [ metric 
N] 
.RB [[ dev ]
If]
.TP
.B route 
.RB [ \-V ] 
.RB [ \-\-version ]
.RB [ \-h ]
.RB [ \--help ]
.\"O .SH DESCRIPTION
.SH ÀâÌÀ
.\"O .B Route
.\"O manipulates the kernel's IP routing tables.  Its primary use is to set
.\"O up static routes to specific hosts or networks via an interface after
.\"O it has been configured with the
.\"O .BR ifconfig (8)
.\"O program.
.B route
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·ÐÏ©¤ËÍѤ¤¤ë¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Ï¡¢¤³¤Î¥³¥Þ¥ó¥É¤ÎÁ°¤Ë
.BR ifconfig (8)
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.\"O When the
.\"O .B add
.\"O or
.\"O .B del
.\"O options are used,
.\"O .B route
.\"O modifies the routing tables.  Without these options,
.\"O .B route
.\"O displays the current contents of the routing tables.
.B add
¤Þ¤¿¤Ï
.B del
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.B route
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.B route
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.\"O .SH OPTIONS
.SH ¥ª¥×¥·¥ç¥ó
.TP
.B \-A family
.\"O use the specified address family (eg `inet'; use `route --help' for a full 
.\"O list).
»ØÄꤷ¤¿¥¢¥É¥ì¥¹¥Õ¥¡¥ß¥ê¡¼¤ò»È¤¦
(Î㤨¤Ð `inet' ¤ò»ØÄꤹ¤ë¡£
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.TP 
.B -F
.\"O operate on the kernel's FIB (Forwarding Information Base) routing
.\"O table. 
.\"O This is the default.
¥«¡¼¥Í¥ë¤Î FIB (Forwarding Information Base) ·ÐÏ©¥Æ¡¼¥Ö¥ë¤òÁàºî¤¹¤ë¡£
¤³¤ì¤Ï¥Ç¥Õ¥©¥ë¥È¤Ç¤¢¤ë¡£
.TP 
.B -C
.\"O operate on the kernel's routing cache.
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.TP
.B \-v
.\"O select verbose operation.
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.TP
.B \-n
.\"O show numerical addresses instead of trying to determine symbolic host
.\"O names. This is useful if you are trying to determine why the route to your
.\"O nameserver has vanished.
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.TP
.B \-e
.\"O use
.\"O .BR netstat (8)-format
.\"O for displaying the routing table.
.\"O .B \-ee 
.\"O will generate a very long line with all parameters from the routing table.
·ÐÏ©¥Æ¡¼¥Ö¥ë¤Îɽ¼¨¤Ë 
.BR netstat (8) 
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.B \-ee 
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.TP
.B del
.\"O delete a route.
·ÐÏ©¤òºï½ü¤¹¤ë¡£
.TP 
.B add 
.\"O add a new route.
¿·¤·¤¤·ÐÏ©¤òÄɲ乤롣
.TP
.B target
.\"O the destination network or host. You can provide IP addresses in dotted
.\"O decimal or host/network names.
ÂоݤȤ¹¤ë¥Í¥Ã¥È¥ï¡¼¥¯¤Þ¤¿¤Ï¥Û¥¹¥È¤ò»ØÄꤹ¤ë¡£
10 ¿Ê¥É¥Ã¥Èɽµ­¤Î IP ¥¢¥É¥ì¥¹¤«¡¢
¥Û¥¹¥È̾¤â¤·¤¯¤Ï¥Í¥Ã¥È¥ï¡¼¥¯Ì¾¤ò»ØÄê²Äǽ¤Ç¤¢¤ë¡£
.TP
.B \-net
.\"O the
.\"O .B target
.\"O is a network.
.B target
¤ò¥Í¥Ã¥È¥ï¡¼¥¯¤È¤¹¤ë¡£
.TP
.B -host
.\"O the
.\"O .B target 
.\"O is a host.
.B target
¤ò¥Û¥¹¥È¤È¤¹¤ë¡£
.TP
.B netmask NM
.\"O when adding a network route, the netmask to be used.
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.TP
.B gw GW
.\"O route packets via a gateway.
¥²¡¼¥È¥¦¥§¥¤¤ò·Ðͳ¤·¤¿·ÐÏ©¥Ñ¥±¥Ã¥È¡£
.\"O .B NOTE:
.\"O The specified gateway must be reachable first. This usually means that
.\"O you have to set up a static route to the gateway beforehand. If you specify
.\"O the address of one of your local interfaces, it will be used to decide about
.\"O the interface to which the packets should be routed to. This is a BSDism
.\"O compatibility hack.
.B Ãí°Õ:
µ­½Ò¤µ¤ì¤¿¥²¡¼¥È¥¦¥§¥¤¤Ï¡¢¤Þ¤ºÅþã²Äǽ¤Ç¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
¤³¤ì¤ÏÄ̾Á°¤â¤Ã¤Æ¥²¡¼¥È¥¦¥§¥¤¤ËÀÅŪ·ÐÏ©¤ò
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¤â¤·¡¢¥í¡¼¥«¥ë¤Î¥¤¥ó¥¿¥Õ¥§¡¼¥¹¤Î¥¢¥É¥ì¥¹¤ò»ØÄꤷ¤¿¾ì¹ç¤Ï¡¢
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¤³¤ì¤Ï BSD ¤Î¼êË¡¤Ë¤Î¤Ã¤È¤Ã¤¿¤ä¤êÊý¤Ç¤¢¤ë¡£
.TP
.B metric M
.\"O set the metric field in the routing table (used by routing daemons) to M.
·ÐÏ©¥Æ¡¼¥Ö¥ë¤Î¥á¥È¥ê¥Ã¥¯ (·ÐÏ©À©¸æ¥Ç¡¼¥â¥ó¤¬»ÈÍѤ¹¤ë) ¤ò M ¤ËÀßÄꤹ¤ë¡£
.TP 
.B mss M
.\"O set the TCP Maximum Segment Size (MSS) for connections over this route
.\"O to M bytes. 
.\"O The default is the device MTU minus headers, or a lower MTU when path mtu 
.\"O discovery occured. This setting can be used to force smaller TCP packets on the
.\"O other end when path mtu discovery does not work (usually because of
.\"O misconfigured firewalls that block ICMP Fragmentation Needed)
»ØÄê¤Î·ÐÏ©¤Ç¤ÎÀܳ¤Î TCP ºÇÂ祻¥°¥á¥ó¥È¥µ¥¤¥º (MSS) ¤ò M ¥Ð¥¤¥È¤ËÀßÄꤹ¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ï¥Ç¥Ð¥¤¥¹¤Î MTU (Maximum Transmission Unit, ºÇÂçÁ÷¿®Ã±°Ì) ¤«¤é
¥Ø¥Ã¥À¡¼¤ò°ú¤¤¤¿¥µ¥¤¥º¤Ç¤¢¤ë¡£
¤Þ¤¿¡¢¥Í¥Ã¥È¥ï¡¼¥¯¥Ñ¥¹¤Î MTU ¤¬¸«¤Ä¤«¤Ã¤¿¾ì¹ç¡¢
¾®¤µ¤¤Êý¤Î MTU ¤¬¥Ç¥Õ¥©¥ë¥È¤Ë¤Ê¤ë¡£
¤³¤ÎÀßÄê¤Ï¡¢¥Í¥Ã¥È¥ï¡¼¥¯¥Ñ¥¹¤Î MTU ¤ò¸«ÉÕ¤±¤ë¤³¤È¤¬¤Ç¤­¤Ê¤«¤Ã¤¿¾ì¹ç
(¤³¤ì¤Ï ICMP Fragmentation Needed ¤ò¥Ö¥í¥Ã¥¯¤·¤Æ¤·¤Þ¤¦¡¢
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.TP 
.B window W 
.\"O set the TCP window size for connections over this route to W
.\"O bytes. This is typically only used on AX.25 networks and with drivers
.\"O unable to handle back to back frames.
»ØÄê¤Î·ÐÏ©¤Ç¤ÎÀܳ¤Î TCP ¥¦¥£¥ó¥É¥¦¥µ¥¤¥º¤ò W ¥Ð¥¤¥È¤ËÀßÄꤹ¤ë¡£
¤³¤ì¤Ï°ìÈÌ¤Ë AX.25 ¥Í¥Ã¥È¥ï¡¼¥¯¤ä¡¢
Ϣ³Ū¤ËÁ÷¤é¤ì¤ë¥Õ¥ì¡¼¥à¤ò¼è¤ê¤³¤Ü¤·¤Æ¤·¤Þ¤¦¤è¤¦¤Ê¥É¥é¥¤¥Ð¡¼¤Ç¤Î¤ß»ÈÍѤµ¤ì¤ë¡£
.TP
.B irtt I
.\"O set the initial round trip time (irtt) for TCP connections over this
.\"O route to I milliseconds (1-12000). This is typically only used on
.\"O AX.25 networks. If omitted the RFC 1122 default of 300ms is used.
»ØÄê¤Î·ÐÏ©¤Ç¤Î TCP Àܳ¤Î½é´ü¥é¥¦¥ó¥É¥È¥ê¥Ã¥×»þ´Ö (irtt) ¤ò
I (1-12000) ¥ß¥êÉäÎÈϰϤÇÀßÄꤹ¤ë¡£
¤³¤ì¤Ï°ìÈÌŪ¤Ë AX.25 ¥Í¥Ã¥È¥ï¡¼¥¯¤Ç¤Î¤ß»ÈÍѤµ¤ì¤ë¡£
¾Êά¤·¤¿¾ì¹ç¡¢RFC 1122 ¤Ç¥Ç¥Õ¥©¥ë¥È¤È¤µ¤ì¤Æ¤¤¤ë 300 ¥ß¥êÉ䬻ÈÍѤµ¤ì¤ë¡£
.TP
.B reject
.\"O install a blocking route, which will force a route lookup to fail.
.\"O This is for example used to mask out networks before using the default
.\"O route.  This is NOT for firewalling.
¥Ö¥í¥Ã¥¯¤¹¤ë·ÐÏ©¤òÀßÄꤹ¤ë¡£
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¤³¤ì¤Ï¡¢¥Õ¥¡¥¤¥¢¡¼¥¦¥©¡¼¥ë¤ÎÀßÄê¤Ç¤Ï"¤Ê¤¤"¡£
.TP
.B mod, dyn, reinstate
.\"O install a dynamic or modified route. These flags are for diagnostic
.\"O purposes, and are generally only set by routing daemons.
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.TP
.B dev If
.\"O force the route to be associated with the specified device, as the
.\"O kernel will otherwise try to determine the device on its own (by
.\"O checking already existing routes and device specifications, and where
.\"O the route is added to). In most normal networks you won't need this.
µ­½Ò¤µ¤ì¤¿¥Ç¥Ð¥¤¥¹¤Ë¡¢·ÐÏ©¤ò´ØÏ¢¤Å¤±¤ë¤³¤È¤ò¶¯À©¤¹¤ë¡£
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(¤¹¤Ç¤Ë¤¢¤ë·ÐÏ©¤È¥Ç¥Ð¥¤¥¹¤Îµ­½Ò¡¢·ÐÏ©¤¬¤É¤³¤ËÄɲ䵤ì¤Æ¤¤¤ë¤«¤Ë¤è¤ë)¡£
°ìÈÌŪ¤Ê¥Í¥Ã¥È¥ï¡¼¥¯¤Ç¤Ï¡¢¤³¤ì¤ò»ØÄꤹ¤ëɬÍפϤʤ¤¡£

.\"O If 
.\"O .B dev If
.\"O is the last option on the command line, the word 
.\"O .B dev
.\"O may be omitted, as it's the default. Otherwise the order of the route
.\"O modifiers (metric - netmask - gw - dev) doesn't matter.
¤â¤·
.B dev If
¤¬¥³¥Þ¥ó¥É¡¦¥é¥¤¥ó¤ÎºÇ¸å¤Î¥ª¥×¥·¥ç¥ó¤Î¾ì¹ç¤Ë¤Ï¡¢
.B dev
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¾¤Î¾ì¹ç¤Ç¤Ï¡¢·ÐÏ©½¤¾þ»Ò¤Î½çÈÖ (metric -netmask - gw - dev) ¤Ï½ÅÍפǤϤʤ¤¡£

.\"O .SH EXAMPLES
.SH Îã
.TP
.B route add -net 127.0.0.0
.\"O adds the normal loopback entry, using netmask 255.0.0.0 (class A net,
.\"O determined from the destination address) and associated with the 
.\"O "lo" device (assuming this device was prviously set up correctly with
.\"O .BR ifconfig (8)). 
¥Í¥Ã¥È¥Þ¥¹¥¯ 255.0.0.0 ¤Ç
(¥¯¥é¥¹ A ¤Î¥Í¥Ã¥È¥ï¡¼¥¯¤¬¡¢Âоݥ¢¥É¥ì¥¹¤«¤é·èÄꤵ¤ì¤ë)¡¢
Ä̾ï¤Î¥ë¡¼¥×¥Ð¥Ã¥¯¤òÄɲ乤롣
¤½¤ì¤Ï¡¢
.B lo
¥Ç¥Ð¥¤¥¹¤Ë´ØÏ¢¤Å¤±¤ì¤é¤ì¤ë (¤³¤Î¥Ç¥Ð¥¤¥¹¤Ï
.B ifconfig(8)
¤ËÁ°¤â¤Ã¤ÆÀßÄꤵ¤ì¤Æ¤¤¤ë¤È²¾Äꤷ¤Æ¤¤¤ë)¡£

.TP 
.B route add -net 192.56.76.0 netmask 255.255.255.0 dev eth0
.\"O adds a route to the network 192.56.76.x via 
.\"O "eth0". The Class C netmask modifier is not really necessary here because
.\"O 192.* is a Class C IP address. The word "dev" can be omitted here. 
.B eth0
·Ðͳ¤Î¥Í¥Ã¥È¥ï¡¼¥¯ 192.56.76.x ¤òÄɲ乤롣
¤³¤³¤Ç¤Î 192.* ¤Ï¥¯¥é¥¹ C ¤Î IP ¥¢¥É¥ì¥¹¤Ê¤Î¤Ç¡¢
¥¯¥é¥¹ C ¤Î¤³¤Î¥Í¥Ã¥È¥Þ¥¹¥¯½¤¾þ»Ò¤Ïɬ¿Ü¤Ç¤Ï¤Ê¤¤¡£
¤³¤Î¾ì¹ç
.B dev
¤È¤¤¤¦¸ì¤Ï¾Êά²Äǽ¤Ç¤¢¤ë¡£

.TP
.B route add default gw mango-gw
.\"O adds a default route (which will be used if no other route matches).
.\"O All packets using this route will be gatewayed through "mango-gw". The
.\"O device which will actually be used for that route depends on how we
.\"O can reach "mango-gw" - the static route to "mango-gw" will have to be
.\"O set up before. 
¥Ç¥Õ¥©¥ë¥È·ÐÏ© (ŬÀڤʷÐÏ©¤¬Â¾¤Ë¤Ê¤¤¾ì¹ç¤Ë»ÈÍѤµ¤ì¤ë¤â¤Î) ¤òÄɲ乤롣
¤³¤Î·ÐÏ©¤ò»ÈÍѤ¹¤ë¤¹¤Ù¤Æ¤Î¥Ñ¥±¥Ã¥È¤Ï¡¢ "mango-gw" ¤ò·Ðͳ¤¹¤ë¡£
¥Ç¥Ð¥¤¥¹¤Ï "mango-gw" ¤ËÅþ㤹¤ë¾å¤Ç¼ÂºÝ¤Ë»ÈÍѤ¹¤ë·ÐÏ©¤Ë°Í¸¤¹¤ë¡£
- "mango-gw" ¤ËÂФ¹¤ëÀÅŪ·ÐÏ©¤¬¤¢¤é¤«¤¸¤áÀßÄꤵ¤ì¤Æ¤¤¤ëɬÍפ¬¤¢¤ë¡£

.TP
.B route add ipx4 sl0
.\"O Adds the route to the "ipx4" host via the SLIP interface (assuming that
.\"O "ipx4" is the SLIP host).
"ipx4" ¤ËÂФ¹¤ë·ÐÏ©¤ò SLIP ¥¤¥ó¥¿¥Õ¥§¡¼¥¹·Ðͳ
("ixp4" ¤Ï SLIP ¥Û¥¹¥È¤Ç¤¢¤ë¤È²¾Äꤹ¤ë) ¤ÇÄɲ乤롣

.TP
.B route add -net 192.57.66.0 netmask 255.255.255.0 gw ipx4
.\"O This command adds the net "192.57.66.x" to be gatewayed through the former
.\"O route to the SLIP interface.
Á°½Ò¤Î SLIP ¥¤¥ó¥¿¥Õ¥§¡¼¥¹·ÐÏ©¤ò¥²¡¼¥È¥¦¥§¥¤¤È¤·¤Æ¡¢
¥Í¥Ã¥È¥ï¡¼¥¯ "192.57.66.x" ¤òÄɲ乤롣

.TP
.B route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0
.\"O This is an obscure one documented so people know how to do it. This sets
.\"O all of the class D (multicast) IP routes to go via "eth0". This is the
.\"O correct normal configuration line with a multicasting kernel.
¤³¤ÎÀßÄê¤Ï¤ï¤«¤ê¤Ë¤¯¤¤¤Î¤Ç¡¢¤¢¤¨¤Æµ­½Ò¤·¤¿¡£
¤³¤ì¤ÏÁ´¤Æ¤Î¥¯¥é¥¹ D (¥Þ¥ë¥Á¥­¥ã¥¹¥È) IP ¤Î·ÐÏ©¤¬
"eth0" ¤òÄ̤äƹԤ¯¤è¤¦¤ËÀßÄꤹ¤ë¡£
¤³¤ì¤Ï¥Þ¥ë¥Á¥­¥ã¥¹¥È¡¦¥«¡¼¥Í¥ë¤ÎÀµ¤·¤¤ÀßÄê¤Ç¤¢¤ë¡£ 

.TP
.B route add -net 10.0.0.0 netmask 255.0.0.0 reject
.\"O This installs a rejecting route for the private network "10.x.x.x."
¥×¥é¥¤¥Ù¡¼¥È¥Í¥Ã¥È¥ï¡¼¥¯ "10.x.x.x" ¤Ø¤Î·ÐÏ©¤ò
µñÈÝ (reject) ¤¹¤ë¤è¤¦¤ËÀßÄꤹ¤ë¡£

.LP
.\"O .SH OUTPUT
.SH ½ÐÎÏ
.\"O The output of the kernel routing table is organized in the following columns
¥«¡¼¥Í¥ë·ÐÏ©¥Æ¡¼¥Ö¥ë¤Î½ÐÎϤϡ¢°Ê²¼¤Î¹àÌܤǹ½À®¤µ¤ì¤ë¡£
.TP
.B Destination     
.\"O The destination network or destination host.
Âоݥͥåȥ¥¯¤â¤·¤¯¤Ï¥Û¥¹¥È¡£
.TP
.B Gateway
.\"O The gateway address or '*' if none set.
¥²¡¼¥È¥¦¥§¥¤¤Î¥¢¥É¥ì¥¹¤«¡¢ ÀßÄꤵ¤ì¤Æ¤¤¤Ê¤¤¤Ê¤é '*' ¤Ç¤¢¤ë¡£
.TP
.B Genmask         
.\"O The netmask for the destination net; '255.255.255.255' for a host destination
.\"O and '0.0.0.0' for the 
.\"O .B default
.\"O route.
.B Genmask        
¤ÏÂоݥͥåȥ¥¯¤Î¥Í¥Ã¥È¥Þ¥¹¥¯¤Ç¤¢¤ë¡£
\&'255.255.255.255' ¤Ï¡¢¥Û¥¹¥È¤¬ÂоݤǤ¢¤ë¾ì¹ç¤Î¥Þ¥¹¥¯¤Ç¡¢
\&'0.0.0.0' ¤Ï¡¢
.B ¥Ç¥Õ¥©¥ë¥È
·ÐÏ©¤Î¥Í¥Ã¥È¥Þ¥¹¥¯¤Ç¤¢¤ë¡£
.TP
.B Flags 
.\"O Possible flags include
»ØÄê²Äǽ¤Ê¥Õ¥é¥°¤È¤·¤Æ¤Ï¡¢°Ê²¼¤Î¤â¤Î¤¬¤¢¤ë¡£
.br
.B U
.\"O (route is
.\"O .BR up )
(·ÐÏ©¤Ï
.B Í­¸ú
¤Ë¤Ê¤Ã¤Æ¤¤¤ë)
.br
.B H
.\"O (target is a
.\"O .BR host )
(¥¿¡¼¥²¥Ã¥È¤Ï
.B ¥Û¥¹¥È
¤Ç¤¢¤ë)
.br
.B G
.\"O (use
.\"O .BR gateway )
.RB ( ¥²¡¼¥È¥¦¥§¥¤
¤ò»ÈÍѤ¹¤ë)
.br
.B R
.\"O .RB ( reinstate
.\"O route for dynamic routing)
.RB ( ²óÉü
¤µ¤ì¤ëưŪ·ÐÏ©)
.br
.B D
.\"O .RB ( dynamically
.\"O installed by daemon or redirect)
(¥Ç¡¼¥â¥ó¤â¤·¤¯¤ÏÃÖ¤­´¹¤¨¤Ë¤è¤ë
.B ưŪ¤Ê
ÀßÄê¤Ç¤¢¤ë)
.br
.B M
.\"O .RB ( modified
.\"O from routing daemon or redirect)
(·ÐÏ©À©¸æ¥Ç¡¼¥â¥ó¤â¤·¤¯¤ÏÃÖ¤­´¹¤¨¤Ë¤è¤ë
.B Êѹ¹
¤Ç¤¢¤ë)
.br
.B A
.\"O (installed by
.\"O .BR addrconf )
.RB ( addrconf
¤Ë¤è¤êÀßÄꤵ¤ì¤Æ¤¤¤ë)
.br
.B C
.\"O .RB ( cache
.\"O entry)
.RB ( ¥­¥ã¥Ã¥·¥å
¤Î¥¨¥ó¥È¥ê¡¼¤Ç¤¢¤ë)
.br
.B !
.\"O .RB ( reject
.\"O route)
.RB ( µñÈÝ
(reject) ¤¹¤ë·ÐÏ©¤Ç¤¢¤ë)
.TP
.B Metric 
.\"O The 'distance' to the target (usually counted in hops). It is not used by
.\"O recent kernels, but may be needed by routing daemons.
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.B Ref    
.\"O Number of references to this route. (Not used in the Linux kernel.)
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.B Use
.\"O Count of lookups for the route.  Depending on the use of -F and -C this will
.\"O be either route cache misses (-F) or hits (-C).
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.B Iface
.\"O Interface to which packets for this route will be sent.
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.B MSS 
.\"O Default maximum segement size for TCP connections over this route.
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.B Window  
.\"O Default window size for TCP connections over this route.
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.B irtt
.\"O Initial RTT (Round Trip Time). The kernel uses this to guess about the best
.\"O TCP protocol parameters without waiting on (possibly slow) answers.
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.\"O .B HH (cached only)
.\"O The number of ARP entries and cached routes that refer to the hardware
.\"O header cache for the cached route. This will be \-1 if a hardware
.\"O address is not needed for the interface of the cached route (e.g. lo).
.B HH (¥­¥ã¥Ã¥·¥å¤Î¤ß)
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.\"O .B Arp (cached only)
.\"O Whether or not the hardware address for the cached route is up to date.
.B Arp (¥­¥ã¥Ã¥·¥å¤Î¤ß)
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.LP
.\"O .SH FILES
.SH ¥Õ¥¡¥¤¥ë
.I /proc/net/ipv6_route
.br
.I /proc/net/route
.br
.I /proc/net/rt_cache
.LP
.\"O .SH SEE ALSO
.SH ´ØÏ¢¹àÌÜ
.I ifconfig(8), netstat(8), arp(8), rarp(8)
.LP
.\"O .SH HISTORY
.SH ÍúÎò
.\"O .B Route
.\"O for Linux was originally written by Fred N.  van Kempen,
.\"O <waltje@uwalt.nl.mugnet.org> and then modified by Johannes Stille and
.\"O Linus Torvalds for pl15. Alan Cox added the mss and window options for
.\"O Linux 1.1.22. irtt support and merged with netstat from Bernd Eckenfels.
Linux ÍѤÎ
.B route
¥³¥Þ¥ó¥É¤Ï¡¢
ºÇ½é¤Ë Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> ¤Ë¤è¤Ã¤Æ½ñ¤«¤ì¡¢
Johannes Stille ¤È Linus Torvalds ¤Ë¤è¤ê pl15 ¤Ë¹¹¿·¤µ¤ì¤¿¡£
Alan Cox ¤Ï mss ¤È window ¥ª¥×¥·¥ç¥ó¤ò Linux 1.1.22 ¤ÇÄɲä·¤¿¡£
irtt ¤Î¥µ¥Ý¡¼¥È¤È netstat ¤Ø¤ÎÊ»¹ç¤Ï Bernd Eckenfels ¤Ë¤è¤ë¤â¤Î¤Ç¤¢¤ë¡£
.\"O .SH AUTHOR
.SH Ãø¼Ô
.\"O Currently maintained by Phil Blundell <Philip.Blundell@pobox.com>.
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