[144785] in North American Network Operators' Group
Re: SDH Fiber Problem
daemon@ATHENA.MIT.EDU (Leigh Porter)
Mon Sep 19 05:21:58 2011
From: Leigh Porter <leigh.porter@ukbroadband.com>
To: jacob miller <mmzinyi@yahoo.com>
Date: Mon, 19 Sep 2011 09:23:02 +0000
In-Reply-To: <1316424006.67260.YahooMailNeo@web39501.mail.mud.yahoo.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Did you try turning it off and on again? ;-)
--=20
Leigh Porter
On 19 Sep 2011, at 10:21, "jacob miller" <mmzinyi@yahoo.com> wrote:
> I have triend to do a ping with the DF bit set.
> Maximum am able to get to is 1600.
> This am guessing is because of the fact I have set the mtu size on My in=
terface to 1600.
>=20
> I have also enable all alarms on the node and am getting the following a=
larm which is registering as beign Minor.
>=20
> "High Order Path Signal Label Mismatch"
>=20
> Regards,
> jacob Miller
>=20
>=20
>=20
> ----- Original Message -----
> From: Leigh Porter <leigh.porter@ukbroadband.com>
> To: jacob miller <mmzinyi@yahoo.com>
> Cc: "nanog@nanog.org" <nanog@nanog.org>
> Sent: Monday, September 19, 2011 11:17 AM
> Subject: Re: SDH Fiber Problem
>=20
> It does sound like an MTU issue. Symptoms are typical. Did you try pings=
end to end with DF bit set and full size datagrams?
>=20
>=20
>=20
> --=20
> Leigh Porter
>=20
>=20
> On 19 Sep 2011, at 09:15, "jacob miller" <mmzinyi@yahoo.com> wrote:
>=20
>> By meanigful traffic I mean traffic like Http traffic
>>=20
>> Am able to ssh no problem.
>>=20
>> Most of the clients on the link are using it for browsing.
>> However we find that even though they are able to resolve and ping diff=
erent sites.
>> When it comes to opening of the page we have the page reading as openin=
g opening .. but the page never gets opened.
>>=20
>> Regards,
>> Jacob Miller
>>=20
>>=20
>>=20
>> ----- Original Message -----
>> From: Leigh Porter <leigh.porter@ukbroadband.com>
>> To: jacob miller <mmzinyi@yahoo.com>
>> Cc: "nanog@nanog.org" <nanog@nanog.org>
>> Sent: Monday, September 19, 2011 11:10 AM
>> Subject: Re: SDH Fiber Problem
>>=20
>> What exactly do you mean by meaningful traffic? ICMP from port to port =
works, can you pass TCP? SSH between routers? Establish a TCP session over=
it?
>>=20
>> Are you using Juniper SRXs ? :-)
>>=20
>> --=20
>> Leigh Porter
>>=20
>>=20
>> On 19 Sep 2011, at 08:24, "jacob miller" <mmzinyi@yahoo.com> wrote:
>>=20
>>> I have tried the pings and am able to ping through with a size of 1600=
with the df-bit=20set
>>>=20
>>> without the df-bit am able to get up to 9000.
>>>=20
>>> The switched on bot ends hav been set to allow jumbo frames through an=
d the system MTU size and routing MTU sizes are at 1998.
>>> The switch is a 2960 Cisco switch.
>>>=20
>>> I have set the mtu on the interface on the end router to 1600 and stil=
l unable to push meaningful traffic.
>>>=20
>>> Regards,
>>> jacob Miller
>>>=20
>>>=20
>>>=20
>>> ----- Original Message -----
>>> From: Randy Bush <randy@psg.com>
>>> To: jacob miller <mmzinyi@yahoo.com>
>>> Cc: "nanog@nanog.org" <nanog@nanog.org>
>>> Sent: Monday, September 19, 2011 9:55 AM
>>> Subject: Re: SDH Fiber Problem
>>>=20
>>>> I can ping on point to point
>>>> I have BGP up and running
>>>> When I try to pass traffic over the link my clients are unable to pas=
s
>>>> any meanigful traffic asn browsing is impossible.
>>>=20
>>> mtu? try various size pings.
>>>=20
>>> filters?
>>>=20
>>> randy
>>>=20
>>>=20
>>>=20
>>> ______________________________________________________________________=
>>> This email has been scanned by the MessageLabs Email Security System.
>>> For more information please visit http://www.messagelabs.com/email
>>> ______________________________________________________________________=
>>=20
>> ______________________________________________________________________
>> This email has been scanned by the MessageLabs Email Security System.
>> For more information please visit http://www.messagelabs.com/email=20
>> ______________________________________________________________________
>>=20
>>=20
>>=20
>> ______________________________________________________________________
>> This email has been scanned by the MessageLabs Email Security System.
>> For more information please visit http://www.messagelabs.com/email=20
>> ______________________________________________________________________
>=20
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please visit http://www.messagelabs.com/email=20
> ______________________________________________________________________
>=20
>=20
>=20
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please visit http://www.messagelabs.com/email=20
> ______________________________________________________________________
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email=20
______________________________________________________________________
