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 interface to 1600. I have also enable all alarms on the node and am getting the following alarm which is registering as beign Minor. "High Order Path Signal Label Mismatch" Regards, jacob Miller ----- 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 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? -- Leigh Porter On 19 Sep 2011, at 09:15, "jacob miller" <mmzinyi@yahoo.com> wrote:
By meanigful traffic I mean traffic like Http traffic
Am able to ssh no problem.
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 different sites. When it comes to opening of the page we have the page reading as opening opening .. but the page never gets opened.
Regards, Jacob Miller
----- 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
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?
Are you using Juniper SRXs ? :-)
-- Leigh Porter
On 19 Sep 2011, at 08:24, "jacob miller" <mmzinyi@yahoo.com> wrote:
I have tried the pings and am able to ping through with a size of 1600 with the df-bit set
without the df-bit am able to get up to 9000.
The switched on bot ends hav been set to allow jumbo frames through and the system MTU size and routing MTU sizes are at 1998. The switch is a 2960 Cisco switch.
I have set the mtu on the interface on the end router to 1600 and still unable to push meaningful traffic.
Regards, jacob Miller
----- 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
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 pass any meanigful traffic asn browsing is impossible.
mtu? try various size pings.
filters?
randy
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