troubleshooting regarding some of web site open issue.

[syjeon]

Hi All.

We have a issue to open some web site. during a day, I've tested with as following configuration.

interface configuration. ---

interface tunnel 0

ip mtu 1420

global configuration ---

ip tcp mss 1360

even if when I put the above configuration, the issue was same as before.

the topology is likes below. it's very simple.

HQ <-- GRE --> Branch office.

Do we have another option to resolve the web site which has accessing issue ?

[ebarticel]

Where is the web site? Can you ping it? Give us a bit more information.

Eugen

[syjeon]

www.naver.com that it is one of the Korea site. when we try to acces www.naver.com on HQ, it's ok. can be displayed correctly. however, when we tried to open same site on branch office, it can't be opened. but, such as google is ok that it has small data(text & video).

So, It looks like MTU issue when the traffics travel via GRE tunnel between HQ and branch office.

So, Do we have another option to check if there is MTU issue or not? if not MTU, what is the possibility to resolve that issue?

[ebarticel]

Did you try to go to that web site using the IP address and not domain name? It may be a DNS issue at the branch office.

At the branch office router you can run debug ip packet and try to access the web site. Check ACL permissions as well.

Eugen