Mismatch duplex ASA and Router

[m0h4j1r]

Hello Community,

i'm having a Connectivity issue, I've noticed that mismatch duplex:

ASA5525# sh int g0/0
Interface GigabitEthernet0/0 "outside", is up, line protocol is up
Hardware is i82574L rev00, BW 1000 Mbps, DLY 10 usec
Auto-Duplex(Half-duplex), Auto-Speed(100 Mbps)
Input flow control is unsupported, output flow control is ofF
36972323 packets input, 26321516545 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
2418 input errors, 0 CRC, 0 frame, 2418 overrun, 0 ignored, 0 abort
0 pause input, 0 resume input
0 L2 decode drops
25567650 packets output, 15587885199 bytes, 0 underruns
0 pause output, 0 resume output
0 output errors, 78420 collisions, 1 interface resets
648921 late collisions, 1293630 deferred
0 input reset drops, 0 output reset drops
input queue (blocks free curr/low): hardware (470/403)
output queue (blocks free curr/low): hardware (476/66)
Traffic Statistics for "outside":
36972323 packets input, 25623681899 bytes
26216571 packets output, 15924771577 bytes
264017 packets dropped

Could this be the reason for the slow internet, or is there another problem like Cabling 

Thank you

[Leo Laohoo]

Port has speed and duplex hard-coded.

[MHM Cisco World]

Yes it reason of low connectivity, 

you see many late collision error this happened when half duplex.

just config duplex and speed manually.

[balaji.bandi]

2418 input errors, 0 CRC, 0 frame, 2418 overrun, 0 ignored, 0 abort
0 output errors, 78420 collisions, 1 interface resets
648921 late collisions, 1293630 deferred
264017 packets dropped

Advise to setup both the side Full duplex and reset the counter and observe