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Different output result from windows ping to catalyst

I have a 3750 connected with a 2960 catalyst and a 3com switch.

There is 6 vlan configured.

I can communicate between vlan perfectly.

However when I ping under windows command prompt from the clients, the result is different.

From the 2960 the clients can ping with load up to 65.000 bytes.

C:\>ping 192.168.100.1 -l 65000

Pinging 192.168.100.1 with 65000 bytes of data:

Reply from 192.168.100.1: bytes=65000 time<1ms TTL=128

Reply from 192.168.100.1: bytes=65000 time<1ms TTL=128

Reply from 192.168.100.1: bytes=65000 time<1ms TTL=128

But from the 3com switch the clients can only ping up to 17997 bytes

C:\>ping 192.168.100.1 -l 65000

Pinging 192.168.100.1 with 65000 bytes of data:

Request timed out.

Request timed out.

Request timed out.

C:\>ping 192.168.100.1 -l 17.997

Pinging 192.168.100.1 with 17997 bytes of data:

Reply from 192.168.100.1: bytes=17997 time=18ms TTL=255

Reply from 192.168.100.1: bytes=17997 time=12ms TTL=255

Reply from 192.168.100.1: bytes=17997 time=12ms TTL=255

The same situation happen when I tried to connect a host (client) directly to the 3750, and then set the connected port into an access mode.

Is there anyone have experienced the same issues?

Any help will be appreciated.

Regards

Dan

1 REPLY
Bronze

Re: Different output result from windows ping to catalyst

Make sure your 3750 is configured to support Jumbo frames. To configure the device, have a look at

http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml#c3

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