So let's fix this problem between Rata one and 2951.
So on the router, it's currently configured to use a speed of 100.
So I'm going to set the speed to order.
This router doesn't give me the option to set duplex.
So show run interface if zero speed is auto show interface f zero.
Speed is still half duplex.
The router can't negotiate with the switch so once again it moves to a fallback position of ten meg
half duplex.
And this is what has caused a lot of problems in the past because the one side such as the router can't
negotiate with the other side.
It simply moves to the lowest possible speed, which is half duplex, ten megabits per second, whereas
the switch is using full duplex.
So on the switch show run interface, if 0/3 speed is ten duplexes full, let's change that to speed.
Or rather speed auto.
Duplex.
Order.
Show run interface f0/3 no configuration SHO interface F zero.
Slash three.
Notice it is now using 100 meg full duplex and on the router.
We are getting 100 meg full duplex, so that's a lot better.
The Radha and the switch have negotiated correctly to use 100 megabits per second full duplex.
So can we ping rather to.
Yes, we can.
Let's do a large ping.
Large data gram size.
Pings are being sent without any problems.
We're not seeing any late collisions at the moment because the speed and duplex have negotiated properly.
This may indicate a problem somewhere else in the network.
But at the moment, everything looks good.
Show interface if zero.
Now we still see a late collisions, but that's because of the previous counters.
So I'm going to clear the counters.
And then do the command show interface f zero again and notice we see zero late collisions.
So when looking at your output, be careful of the information.
Clear counters.
And we could specify a specific interface.
Allows us to clear the counters on that interface so that we see fresh information.
So once again, if we ping.
Ten one one 2000 pings.
Large packet size.
We're sending some traffic.
On this side.
Show interface f zero.
Slash three.
We've got the input errors and CRCs are clear counters.
If 0/3.
We don't see any input errors and crises.
Now, obviously, you need to monitor that over a period of time.
So we're seeing a certain number of packets in and a certain number of packets out.
So traffic is definitely being sent and received under this interface.
We're not seeing any input errors, which is better than what we saw last time.
But you just need to monitor that for a period of time.
On the router show interface f zero, we see the number of packets input, number of packets output.
We have no late collisions at the moment, so that's a lot better than what we saw previously.
Now on the switch, we still seeing another problem with a duplex mismatch to switch to.
So this connection here has a duplex problem.