[144787] in North American Network Operators' Group
Re: SDH Fiber Problem
daemon@ATHENA.MIT.EDU (jacob miller)
Mon Sep 19 05:35:03 2011
Date: Mon, 19 Sep 2011 02:33:33 -0700 (PDT)
From: jacob miller <mmzinyi@yahoo.com>
To: "nanog@nanog.org" <nanog@nanog.org>
In-Reply-To: <C4D68053-10AD-4931-A8EA-2411F9F7A201@ukbroadband.com>
Reply-To: jacob miller <mmzinyi@yahoo.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Did so and am able to ping through=0A=0ARegards,=0AJacob Miller=0A=0A=0A=0A=
----- Original Message -----=0AFrom: Leigh Porter <leigh.porter@ukbroadband=
.com>=0ATo: jacob miller <mmzinyi@yahoo.com>=0ACc: "nanog@nanog.org" <nanog=
@nanog.org>=0ASent: Monday, September 19, 2011 12:23 PM=0ASubject: Re: SDH =
Fiber Problem=0A=0ADid you try turning it off and on again? ;-)=0A=0A-- =0A=
Leigh Porter=0A=0A=0AOn 19 Sep 2011, at 10:21, "jacob miller" <mmzinyi@yaho=
o.com> wrote:=0A=0A> I have triend to do a ping with the DF bit set.=0A> Ma=
ximum am able to get to is 1600.=0A> This am guessing is because of the fac=
t I have set the mtu size on My interface to 1600.=0A> =0A> I have also ena=
ble all alarms on the node and am getting the following alarm which is regi=
stering as beign Minor.=0A> =0A> "High Order Path Signal Label Mismatch"=0A=
> =0A> Regards,=0A> jacob Miller=0A> =0A> =0A> =0A> ----- Original Message =
-----=0A> From: Leigh Porter <leigh.porter@ukbroadband.com>=0A> To: jacob m=
iller <mmzinyi@yahoo.com>=0A> Cc: "nanog@nanog.org" <nanog@nanog.org>=0A> S=
ent: Monday, September 19, 2011 11:17 AM=0A> Subject: Re: SDH Fiber Problem=
=0A> =0A> It does sound like an MTU issue. Symptoms are typical. Did you tr=
y pings end to end with DF bit set and full size datagrams?=0A> =0A> =0A> =
=0A> -- =0A> Leigh Porter=0A> =0A> =0A> On 19 Sep 2011, at 09:15, "jacob mi=
ller" <mmzinyi@yahoo.com> wrote:=0A> =0A>> By meanigful traffic I mean traf=
fic like Http traffic=0A>> =0A>> Am able to ssh no problem.=0A>> =0A>> Most=
of the clients on the link are using it for browsing.=0A>> However we find=
that even though they are able to resolve and ping different sites.=0A>> W=
hen it comes to opening of the page we have the page reading as opening ope=
ning .. but the page never gets opened.=0A>> =0A>> Regards,=0A>> Jacob Mill=
er=0A>> =0A>> =0A>> =0A>> ----- Original Message -----=0A>> From: Leigh Por=
ter <leigh.porter@ukbroadband.com>=0A>> To: jacob miller <mmzinyi@yahoo.com=
>=0A>> Cc: "nanog@nanog.org" <nanog@nanog.org>=0A>> Sent: Monday, September=
19, 2011 11:10 AM=0A>> Subject: Re: SDH Fiber Problem=0A>> =0A>> What exac=
tly do you mean by meaningful traffic? ICMP from port to port works, can yo=
u pass TCP? SSH between routers? Establish a TCP session over it?=0A>> =0A>=
> Are you using Juniper SRXs ? :-)=0A>> =0A>> -- =0A>> Leigh Porter=0A>> =
=0A>> =0A>> On 19 Sep 2011, at 08:24, "jacob miller" <mmzinyi@yahoo.com> wr=
ote:=0A>> =0A>>> I have tried the pings and am able to ping through with a =
size of 1600 with the df-bit set=0A>>> =0A>>> without the df-bit am able to=
get up to 9000.=0A>>> =0A>>> The switched on bot ends hav been set to allo=
w jumbo frames through and the system MTU size and routing MTU sizes are at=
1998.=0A>>> The switch is a 2960 Cisco switch.=0A>>> =0A>>> I have set the=
mtu on the interface on the end router to 1600 and still unable to push me=
aningful traffic.=0A>>> =0A>>> Regards,=0A>>> jacob Miller=0A>>> =0A>>> =0A=
>>> =0A>>> ----- Original Message -----=0A>>> From: Randy Bush <randy@psg.c=
om>=0A>>> To: jacob miller <mmzinyi@yahoo.com>=0A>>> Cc: "nanog@nanog.org" =
<nanog@nanog.org>=0A>>> Sent: Monday, September 19, 2011 9:55 AM=0A>>> Subj=
ect: Re: SDH Fiber Problem=0A>>> =0A>>>> I can ping on point to point=0A>>>=
> I have BGP up and running=0A>>>> When I try to pass traffic over the link=
my clients are unable to pass=0A>>>> any meanigful traffic asn browsing is=
impossible.=0A>>> =0A>>> mtu?=A0 try various size pings.=0A>>> =0A>>> filt=
ers?=0A>>> =0A>>> randy=0A>>> =0A>>> =0A>>> =0A>>> ________________________=
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