diff options
Diffstat (limited to 'usr.sbin/traceroute')
| -rw-r--r-- | usr.sbin/traceroute/traceroute.8 | 61 |
1 files changed, 30 insertions, 31 deletions
diff --git a/usr.sbin/traceroute/traceroute.8 b/usr.sbin/traceroute/traceroute.8 index b1a370d05bc..f22ceb743e6 100644 --- a/usr.sbin/traceroute/traceroute.8 +++ b/usr.sbin/traceroute/traceroute.8 @@ -1,4 +1,4 @@ -.\" $OpenBSD: traceroute.8,v 1.64 2016/10/20 20:00:01 jmc Exp $ +.\" $OpenBSD: traceroute.8,v 1.65 2016/10/20 20:15:09 jmc Exp $ .\" $NetBSD: traceroute.8,v 1.6 1995/10/12 03:05:50 mycroft Exp $ .\" .\" Copyright (c) 1990, 1991, 1993 @@ -104,7 +104,7 @@ Set the first TTL or hop limit used in outgoing probe packets. The effect is that the first first_ttl \- 1 hosts will be skipped in the output of .Nm traceroute . -The default value is 1 (skip no hosts). +The default is 1 (skip no hosts). .It Fl g Ar gateway_addr Add .Ar gateway_addr @@ -120,10 +120,11 @@ This is useful for checking for asymmetric routing. .It Fl m Ar max_ttl Set the maximum TTL or hop limit. The default is the value of the system's -.Cm net.inet.ip.ttl +.Va net.inet.ip.ttl or -.Cm net.inet6.ip6.hlim -MIB variable, which defaults to 64. +.Va net.inet6.ip6.hlim +.Xr sysctl 8 +variable, which defaults to 64. .It Fl n Print hop addresses numerically rather than symbolically and numerically (saves a nameserver address-to-name lookup for each gateway found on the @@ -140,12 +141,13 @@ This option is not available for IPv6. .It Fl p Ar port Set the base UDP .Ar port -number used in probes (default is 33434). +number used in probes. +The default is 33434. .Nm hopes that nothing is listening on UDP ports -.Em base +.Ar base to -.Em base+nhops*nqueries-1 +.Ar base Ns + Ns Ar nhops Ns * Ns Ar nqueries Ns -1 at the destination host (so an ICMP .Dv PORT_UNREACHABLE message will @@ -155,8 +157,8 @@ listening on a port in the default range, this option can be used to pick an unused port range. .It Fl q Ar nqueries Set the number of probes per TTL to -.Ar nqueries -(default is three probes). +.Ar nqueries . +The default is three probes. .It Fl S Print how many probes were not answered for each hop. .It Fl s Ar src_addr @@ -170,21 +172,20 @@ If the IP address is not one of this machine's interface addresses and the user is not the superuser, an error is returned and nothing is sent. .It Fl t Ar toskeyword -Set the -.Em type-of-service -in probe packets to the following value (default zero). +Set the type-of-service (TOS) in probe packets. The value may be one of -.Ar critical , -.Ar inetcontrol , -.Ar lowdelay , -.Ar netcontrol , -.Ar throughput , -.Ar reliability , +.Cm critical , +.Cm inetcontrol , +.Cm lowdelay , +.Cm netcontrol , +.Cm throughput , +.Cm reliability , or one of the DiffServ Code Points: -.Ar ef , -.Ar af11 ... af43 , -.Ar cs0 ... cs7 ; +.Cm ef , +.Cm af11 ... af43 , +.Cm cs0 ... cs7 ; or a number in either hex or decimal. +The default is zero. This option can be used to see if different types-of-service result in different paths. If this option is used, changes to the type-of-service in the @@ -192,16 +193,13 @@ returned packets are displayed. (If you are not running a .Bx 4.3 tahoe or later system, this may be academic since the normal network -services like telnet and ftp don't let you control the -.Dv TOS ) . -Not all values of -.Dv TOS -are legal or -meaningful \- see the IP spec for definitions. +services like telnet and ftp don't let you control the TOS). +Not all values of TOS are legal or meaningful \- +see the IP spec for definitions. Useful values are probably -.Ar lowdelay +.Cm lowdelay and -.Ar throughput . +.Cm throughput . This option is not available for IPv6. .It Fl V Ar rtable Set the routing table to be used. @@ -213,7 +211,8 @@ and .Dv UNREACHABLE Ns s are listed. .It Fl w Ar waittime -Set the time (in seconds) to wait for a response to a probe (default 5). +Set the time, in seconds, to wait for a response to a probe. +The default is 5. .It Fl x Print the ICMP extended headers if available. This option is not available for IPv6. |