Re: Very Strange Problem

Also one thing I forgot to mention is the device is in Spain dont know if
that makes any kind of difference.. Any other ideas please let me know??

On Thu, Jul 1, 2010 at 11:35 PM, Sidney Spencer <ccie22926_at_gmail.com> wrote:

> I tried changing the MTU as well as the MSS on the dialer interface an
> still have the same problem.. Any other thoughts?? There are about 30
> machines that this is affecting if changing the MTU on the workstation is
> the fix, I would like to see if there is anything else before hand..
> Thanks all..
>
>
> On Thu, Jul 1, 2010 at 10:14 PM, Tyson Scott <tscott_at_ipexpert.com> wrote:
>
>> Your dialer MTU should be no higher than 1492. Right now it is at the
>> default of 1500.
>>
>> Try changing the MTU on the host itself to 1300 or something. I changed
>> my
>> MTU on my laptop to 1350 to solve problems when windowing was being
>> ignored
>> by servers.
>>
>> To do it on a windows machine follow these instructions
>>
>> http://smallvoid.com/article/vista-tcpip-mtu.html
>>
>> See if that solves the problem
>>
>> Regards,
>>
>> Tyson Scott - CCIE #13513 R&S, Security, and SP
>> Managing Partner / Sr. Instructor - IPexpert, Inc.
>> Mailto: tscott_at_ipexpert.com
>>
>>
>> -----Original Message-----
>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>> Sidney Spencer
>> Sent: Thursday, July 01, 2010 11:02 PM
>> To: Cisco certification
>> Subject: Very Strange Problem
>>
>> Hello all,
>>
>>
>> I have run into an issue that I am having the hardest time trying to
>> figure
>> out what it is. Here is what is happening:
>>
>> I have a 2801 Router with and ASDL wic installed in it. There is
>> currently
>> 3 site to site VPN's configured, and basic routing, and PAT. What is
>> happening is every time a user behind this router tries to access the
>> internet (going to a site www.yahoo.com or facebook etc) it basically
>> sits
>> there and just continues to load and take forever but never comes up, if I
>> go to www.google.com that has no images to load it comes up really quick
>> with no issue. Here is a kicker, if I try to load a web page on internal
>> site on the other side of the tunnel everything comes up as normal with no
>> problems, the issue is only when I try to access external websites from
>> that
>> location. I am able to ping and telnet to port 80 with no problems. I
>> thought it was a fragmentation issue, so I changed MTU and MSS as low as
>> 1200 and the problem still persists. Has anyone else seen this issue? I
>> found the issue on the internet but have not seen where anyone has come up
>> with a fix for it, so I thought I would see if anyone here may have seen
>> this issue and resolved?
>>
>> The configuration is pretty basic (snippits)
>>
>> F0/0 - Shutdown
>> !
>> interface FastEthernet0/1
>> description $ES_LAN$
>> ip address 192.168.90.1 255.255.255.0
>> ip nat inside
>> ip virtual-reassembly
>> duplex auto
>> speed auto
>>
>> interface ATM0/3/0
>> no ip address
>> no ip mroute-cache
>> no atm ilmi-keepalive
>> dsl operating-mode auto
>> hold-queue 224 in
>> !
>> interface ATM0/3/0.1 point-to-point
>> pvc 8/32
>> encapsulation aal5snap
>> pppoe-client dial-pool-number 1
>> !
>> !
>> interface Dialer1
>> ip address negotiated
>> ip nat outside
>> ip virtual-reassembly
>> encapsulation ppp
>> dialer pool 1
>> dialer-group 1
>> no cdp enable
>> ppp authentication chap pap callin
>> ppp chap hostname xxxxxxxxx
>> ppp chap password 0 xxxxxxxx
>> ppp pap sent-username xxxxxxxxxx password 0 xxxxxxxxx
>>
>> ip route 0.0.0.0 0.0.0.0 Dialer1
>>
>> ip nat inside source route-map internet_nat interface Dialer1 overload
>>
>>
>> ADSL is used because that is the only option in the location in which this
>> router is located. Any ideas on where I should be looking is much
>> appreciated, the next step for me is to probably open a TAC case but
>> wanted
>> to get others thoughts first..
>>
>>
>> Sid
>>
>>
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>>
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Received on Fri Jul 02 2010 - 00:29:06 ART