[PATCH 0/2] [iputils] MTU discovery changes

[PATCH 0/2] [iputils] MTU discovery changes

[John Heffner]

These add some changes that make tracepath a little more useful for 
diagnosing MTU issues.  The length flag helps distinguish between MTU 
black holes and other types of black holes by allowing you to vary the 
probe packet lengths.  Using PMTUDISC_PROBE gives you the same results 
on each run without having to flush the route cache, so you can see 
where MTU changes in the path actually occur.

The PMTUDISC_PROBE patch goes in should be conditional on whether the 
corresponding kernel patch (just sent) goes in.

   -John

Re: [PATCH 0/2] [iputils] MTU discovery changes

[YOSHIFUJI Hideaki / 吉藤英明]

In article <460474E1.9070805@psc.edu> (at Fri, 23 Mar 2007 20:46:25 -0400), John Heffner <jheffner@psc.edu> says:

> These add some changes that make tracepath a little more useful for 
> diagnosing MTU issues.  The length flag helps distinguish between MTU 
> black holes and other types of black holes by allowing you to vary the 
> probe packet lengths.  Using PMTUDISC_PROBE gives you the same results 
> on each run without having to flush the route cache, so you can see 
> where MTU changes in the path actually occur.
> 
> The PMTUDISC_PROBE patch goes in should be conditional on whether the 
> corresponding kernel patch (just sent) goes in.

Please update documents (docs/*.sgml) as well.  Thanks.

--yoshfuji

Re: [PATCH 0/2] [iputils] MTU discovery changes

[YOSHIFUJI Hideaki / 吉藤英明]

In article <20070403.174506.118959743.yoshfuji@linux-ipv6.org> (at Tue, 03 Apr 2007 17:45:06 +0900 (JST)), YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> says:

> > The PMTUDISC_PROBE patch goes in should be conditional on whether the 
> > corresponding kernel patch (just sent) goes in.
> 
> Please update documents (docs/*.sgml) as well.  Thanks.

doc/*.sgml. Sorry for typo.

--yoshfuji

[PATCH] [iputils] Add documentation for the -l flag.

[John Heffner]

---
 doc/tracepath.sgml |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/doc/tracepath.sgml b/doc/tracepath.sgml
index 71eaa8d..c0f308b 100644
--- a/doc/tracepath.sgml
+++ b/doc/tracepath.sgml
@@ -15,6 +15,7 @@ traces path to a network host discovering MTU along this path</refpurpose>
 <refsynopsisdiv>
 <cmdsynopsis>
 <command>tracepath</command>
+<arg choice="opt">-l <replaceable/pktlen/</arg>
 <arg choice="req"><replaceable/destination/</arg>
 <arg choice="opt"><replaceable/port/</arg>
 </cmdsynopsis>
@@ -39,6 +40,18 @@ of UDP ports to maintain trace history.
 </para>
 </refsect1>
 
+<refsect1><title>OPTIONS</title>
+<variablelist>
+ <varlistentry>
+  <term><option/-l/</term>
+  <listitem><para>
+Sets the initial packet length to <replaceable/pktlen/ instead of
+65536 for <command/tracepath/ or 128000 for <command/tracepath6/.
+  </para></listitem>
+ </varlistentry>
+</variablelist>
+</refsect1>
+
 <refsect1><title>OUTPUT</title>
 <para>
 <literallayout>
-- 
1.5.0.2.gc260-dirty

[PATCH] [iputils] Document -n flag.

[John Heffner]

---
 doc/tracepath.sgml |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/doc/tracepath.sgml b/doc/tracepath.sgml
index c0f308b..1bc83b9 100644
--- a/doc/tracepath.sgml
+++ b/doc/tracepath.sgml
@@ -15,6 +15,7 @@ traces path to a network host discovering MTU along this path</refpurpose>
 <refsynopsisdiv>
 <cmdsynopsis>
 <command>tracepath</command>
+<arg choice="opt">-n</arg>
 <arg choice="opt">-l <replaceable/pktlen/</arg>
 <arg choice="req"><replaceable/destination/</arg>
 <arg choice="opt"><replaceable/port/</arg>
@@ -42,6 +43,14 @@ of UDP ports to maintain trace history.
 
 <refsect1><title>OPTIONS</title>
 <variablelist>
+
+ <varlistentry>
+  <term><option/-n/</term>
+  <listitem><para>
+Do not look up host names.  Only print IP addresses numerically.
+  </para></listitem>
+ </varlistentry>
+
  <varlistentry>
   <term><option/-l/</term>
   <listitem><para>
-- 
1.5.0.2.gc260-dirty

Re: [PATCH] [iputils] Add documentation for the -l flag.

[YOSHIFUJI Hideaki / 吉藤英明]

Applied two documentation patches.  Thanks.

In article <11756226682486-git-send-email-jheffner@psc.edu> (at Tue,  3 Apr 2007 13:51:07 -0400), John Heffner <jheffner@psc.edu> says:

> ---
>  doc/tracepath.sgml |   13 +++++++++++++
>  1 files changed, 13 insertions(+), 0 deletions(-)
> 
> diff --git a/doc/tracepath.sgml b/doc/tracepath.sgml
> index 71eaa8d..c0f308b 100644
> --- a/doc/tracepath.sgml
> +++ b/doc/tracepath.sgml
> @@ -15,6 +15,7 @@ traces path to a network host discovering MTU along this path</refpurpose>
>  <refsynopsisdiv>
>  <cmdsynopsis>
>  <command>tracepath</command>
> +<arg choice="opt">-l <replaceable/pktlen/</arg>
>  <arg choice="req"><replaceable/destination/</arg>
>  <arg choice="opt"><replaceable/port/</arg>
>  </cmdsynopsis>
> @@ -39,6 +40,18 @@ of UDP ports to maintain trace history.
>  </para>
>  </refsect1>
>  
> +<refsect1><title>OPTIONS</title>
> +<variablelist>
> + <varlistentry>
> +  <term><option/-l/</term>
> +  <listitem><para>
> +Sets the initial packet length to <replaceable/pktlen/ instead of
> +65536 for <command/tracepath/ or 128000 for <command/tracepath6/.
> +  </para></listitem>
> + </varlistentry>
> +</variablelist>
> +</refsect1>
> +
>  <refsect1><title>OUTPUT</title>
>  <para>
>  <literallayout>
> -- 
> 1.5.0.2.gc260-dirty
> 
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Re: [PATCH 0/2] [iputils] MTU discovery changes

[YOSHIFUJI Hideaki / 吉藤英明]

In article <460474E1.9070805@psc.edu> (at Fri, 23 Mar 2007 20:46:25 -0400), John Heffner <jheffner@psc.edu> says:

> These add some changes that make tracepath a little more useful for 
> diagnosing MTU issues.  The length flag helps distinguish between MTU 
> black holes and other types of black holes by allowing you to vary the 
> probe packet lengths.  Using PMTUDISC_PROBE gives you the same results 
> on each run without having to flush the route cache, so you can see 
> where MTU changes in the path actually occur.
> 
> The PMTUDISC_PROBE patch goes in should be conditional on whether the 
> corresponding kernel patch (just sent) goes in.

Applied, thanks.

--yoshfuji