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New Member

configuration check on particular device.

Team,

Yesterday,  myself and local support team has been engaged to perform troubleshooting the issue of some web site accessing .

Mos of this case is cased by MTU issue, So, I've tried to configure the following configuration on interface tunnel 0.

Device: Cisco 7609 with IOS s72033-adventerprisek9_wan-mz.122-18.SXF8.bin

interface tunnel 0

ip mtu 1400 (ok)

ip tcp adjust-mss 1300 ( failed while input the configuration to tunnel 0)

the error message likes as below.

Ip tcp adjust-mss 1360

^

% Invalid input detected at '^' marker.

ip tcp ?

compression-connections Maximum number of compressed connections

header-compression Enable TCP header compression

p tcp adjust-mss 1360
^
% Invalid input detected at '^' marker.

--> it looks like 'ip tcp adjust-mss' did not work.

I've tried to figure out what the supporting command after 'ip tcp' in tunnel 0 and following likes..

ip tcp ?
compression-connections Maximum number of compressed connections
header-compression Enable TCP header compression

there is no such command about 'ip tcp adjust-mss ####'

So, my questions is that what is the replace command for 'ip tcp adjust-mss' ? Is this only support on Router? such as Cisco 7200.

or not, to take effect same functional on C7609, what is the command for that?

3 REPLIES
Bronze

configuration check on particular device.

You have another post reagrding this matter. I have posted a link to more info.

Please reefrain from posting multiple times.

Read this

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t4/feature/guide/ft_admss.html

Eugen

Hall of Fame Super Silver

configuration check on particular device.

And my reading of the documentation indicates that ip tcp adjust-mss is intended for the LAN interface not the tunnel interface. I suggest to the original poster that he try the command on the LAN interface and then tell us the results.

HTH

Rick

New Member

configuration check on particular device.

ok... Is there anyone who can check the 'ip tcp adjust-mss' on lan interface on Cisco 7609 or Cisco 6509?

as per my investigating, ip tcp adjust-mss is working on tunnel interface on Cisco 7200 and Cisco 2800. but, it seems to be differently working on Cisco 7600 and  6500.

However, our goal is that we need to apply 'ip tcp adjust-mss' inside of tunnel 0 not real lan interface.

I'm not sure how can I implement for that.

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