why so faster in connecting specific port

[taikihashimoto]

Data transferring speed is clearly much faster in connecting to GE1/0/45 than GE3/0/25.

Pls advise me why becoming faster if you know it. Port interfaces Information is very limited as follows.

interface GigabitEthernet1/0/45

 switchport access vlan 13

 switchport mode access

 switchport nonegotiate

 load-interval 30

 channel-group 9 mode active

 spanning-tree portfast

interface GigabitEthernet3/0/25

 switchport access vlan 13

 switchport mode access

 load-interval 30

 channel-group 20 mode active

Data transferring speed is clearly much faster in connecting to GE1/0/45 than GE3/0/25.

Pls advise me why becoming faster if you know it.

Port interfaces Information is very limited as follows.

[Aaron Harrison]

Hi

'Spanning-tree portfast' will greatly speed up the time take for the port to come 'up'.

Are you saying it is also faster when in steady operation?
 

Post up a 'show interface x/x/x' for each port in that case.

Aaron

[taikihashimoto]

Hi,

Exactly, 'Spanning-tree portfast' has port come up faster. 

How about in steady operation ?  Average throughput very fast in backup operation, Is it relavant to 'Spanning-tree portfast' or any other reason?

[Jon Marshall]

The throughput should have nothing to do with portfast.

What switch is this ?

If it is a modular switch then what modules are the ports on ?

Edit - I'm not sure that is a modular switch but both ports are part of etherchannels so you need to look at the whole configuration.

Jon

[taikihashimoto]

Hi Jon,

Switch is 3850 and Module on the Ports is backup server which backing up data to storage in same subnet. Ethernetchannels, both are same configuration just only different about group name.

Taiki