Internet works for some customers and doesn't work for others. I am wondering 
if customers in trouble are not using any king of Internet acceleration/cache 
application which modifies the DF bit in TCP. Before focusing on TCP, I will 
check the following
- download a large file using tftp
- download the same file using ftp
-what customers in trouble have in common?

Sorry for not being able to provide a straight answer to your question, if you 
provide more details, it will be easy to find what the problem is.

Patrice Ngassam
Ceritified Cisco CCNP, CCDP, CCIP




Date: Wed, 24 Mar 2010 09:57:45 -0600
From: [email protected]
To: [email protected]; [email protected]
Subject: Re: [OSL | CCIE_RS] MTU on Ethernet interface



















Look into the ‘ip tcp adjust-mss’
configuration option on the physical interface.

 



Ken Matlock

Network Analyst

Exempla Healthcare

(303) 467-4671

[email protected]











From:
[email protected]
[mailto:[email protected]] On
Behalf Of VALERE BIKANDA

Sent: Wednesday, March 24, 2010
9:54 AM

To: [email protected]

Subject: [OSL | CCIE_RS] MTU on
Ethernet interface



 






 
  
  
  
   
    
     
    
    
    
    
    
     
    
   
  
  
  
  
 
 
  
  
  
   
    
     
    
    
    
     
      
       
      
     
     
      
      
      
      Hello !
      
      
       
      
      
      I work with
      an ISP as network engineer and some of my customers are
      connected to my Internet backbone network using BGP op IGP for
      some of them.
      
      
       
      
      
      However, some
      of the customers are complaining that the can't get to some web
      site. But when trying to change the MTU at the end user workstation, the
      connectivity to all the site is OK.
      
      
       
      
      
      I don't
      know the solution and am wondering how to change the MTU on my
      router's Ethernet interface without asking the customer to change the MTU
      on all the worksattion ?
      
      
       
      
      
      Traceroutes
      shows that packets are lost beyong my provider's backbone. Is there
      something my Internet provider should do in other to let my customer
      have access to all the web sites ?

       
      
      
       
      
      
      Thanks !
      
      
       
      
      Luc Valere
      BIKANDA

      
      
     
     
      
       
      
     
    
    
    
    
     
    
   
  
  
  
  
 
 
  
  
  
   
    
     
    
    
    
    
    
     
    
   
  
  
  
  
 






 

                                          
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