[117354] in North American Network Operators' Group
Re: Wireless STM-1 link
daemon@ATHENA.MIT.EDU (Kenny Sallee)
Thu Sep 10 12:07:32 2009
In-Reply-To: <AA6E7B79584644F3A75457E294E47C8C@EU.corp.clearwire.com>
Date: Thu, 10 Sep 2009 09:06:01 -0700
From: Kenny Sallee <kenny.sallee@gmail.com>
To: Rens <rens@autempspourmoi.be>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Thu, Sep 10, 2009 at 2:55 AM, Rens <rens@autempspourmoi.be> wrote:
> All the interfaces are forced to 1Gbps and full duplex.
>
> Maybe I should give some extra info.
> All the traffic seems to pass ok via that link but I have seen that often
> OSPF adjacencies go down/up , I suspect that the HELLO packets are being
> dropped that pass via that link.
>
> That's why I started to look a little deeper and do some ping tests.
>
> -----Original Message-----
> From: Adam Goodman [mailto:adam@wispring.com]
> Sent: jeudi 10 septembre 2009 11:45
> To: Rens
> Cc: <nanog@nanog.org>
> Subject: Re: Wireless STM-1 link
>
> Sounds like this might be an Ethernet negotiaton problem
>
> --------
> Sent from my phone
>
Seems everyone has focused on GE as the problem. You can quickly rule that
out by looking at interface error counters and doing PING tests from the
wireless router/device to something on the local network on both sides. If
OSPF is flapping because of missed HELLO packets then I'm thinking you have
a problem with either saturation on the link or actual wireless issues.
When PING does work what do the times look like? I'd look at static routing
for a bit (if practical) or changing your OSPF HELLO intervals to see if
that does anything. Here's a good link on troubleshooting
OSPF adjacency changes:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094050.shtml
