Kirt, Try this command to change the MTU = 3ComChassis_14> set ppp system_mtu 1500 Dave On Mon, 25 Jul 2005, Kirti S. Bajwa wrote:
Please be kind and direct me to the location (and/or) procedure to change the MTU? Is it in 3Com or someplace else? I am much obliged.
Kirt
-----Original Message----- From: usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com [mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On Behalf Of Jason Percle Sent: Monday, July 25, 2005 1:37 PM To: 'Discussion relating to the 3Com/US Robotics Total Controlmodemsystems.' Subject: RE: [USR-TC] RE: Dial-In Problem!!!!
Check your MTU size. I believe the recommended size for dialup is 576.
_____
From: usr-tc-bounces+jjperc=petronet.net@mailman.xmission.com [mailto:usr-tc-bounces+jjperc=petronet.net@mailman.xmission.com] On Behalf Of Kirti S. Bajwa Sent: Monday, July 25, 2005 6:31 PM To: usr-tc@mailman.xmission.com Subject: [USR-TC] RE: Dial-In Problem!!!!
Hello:
Please help. This problem is going on for the last 7 weeks without fixing.
TC1000
1-HiPer NMC
2-HiPerARC
10-Hiper DSP
We are a small ISP (400 customers). We have 2-ISDN-PRI lines for our customers to dial in. Our entire system looks like this:
/
/ T1 to Internet Backbone
/
CISCO 26XX Router
|
HUB 10/100
|
---------------------------------------------------------------------------- -----------------------------
| | | | | |
NMC ARC1 ARC2 Web Authentication Internal Network
----------- 3Com ------------ Server email Server
| | | | | | | | | | | |
Customer Dial-In
Our customers can dial-in, are authenticated and can access the internal web site (www.tibonline.net <http://www.tibonline.net/> ) and retrieve their email. But when they try to connect to any web site (outside our network) on the external net (such as www.yahoo.com <http://www.yahoo.com/> ), they time out with a message saying that "this page can't be displayed".
We have changed the HUBs, RJ45 cables. We have the CISCO Router tested fine. Finally, I replaced the 3COM box with a backup box and the problem continues. Interestingly, we can access any Internet web site (www.msn.com <http://www.msn.com/> , www.yahoo.com <http://www.yahoo.com/> , etc.) from our internal network (over LAN) without problem.
I have called Sprint, who provides us with ISDN-PRI lines. They claim that the lines are testing OK.
Has anyone faced the similar problem? If YES, what was the solution?
Kirti