MTU size 1500

[rite2anil]

Hi All,

I have 2 cisco 3750 with ipservicesk9-mz.122-35.se5 ios working in stacked environment. I have a  8 mbps EoSDH  link on this switch connecting  the other switch of the same configuration. I am able to ping the end to end devices but when ever I try to take any end user's machine on Remote desktop, the connection becomes very slow. I am using static routing on both the switches and no access-lists are configured. Normally my all the applications are working fine. Even I tried to transfer the data thru FTP but not succeeded means like remote connection, this also becomes very slow.

Please help me out.

Regards,

Anil K.

[Peter Paluch]

Hello Anil,

According to your topic subject, do you suspect the MTU to be an issue? You can verify the MTU setting by pinging a switch over the EoSDH link from the local switch with MTU set to 1500 and DF bit (do not fragment) set:

ping X.X.X.X size 1500 df-bit

However, I have seen big performance impacts cause by optical-to-metallic converters inadvertently configured for half-duplex operation. Can you verify that no duplex mismatches (and possibly full duplex) is configured on the connections to the EoSDH service?

Best regards,

Peter

[rite2anil]

Hi Peter,

Interfaces are configured on Full duplex and there is no mismatch of duplex as well. further I am also be able to ping the IP with DF bit set.

Regards,

Anil K.