I have C3750E as a coreswitch and C2960G as access swtiches. All switches are connected to coreswtich using CAT6 cable and interface is configured as trunk. When I check the interface status on coreswitch I can see some of the trunk lines are connected at 100Mbps. All switches are having same trunk configuration.
Most of the time it could be because the hardware register might not have set properly. Please check the output of the following
show controllers ethernet-controller phy detail | be 1/0/13 and check for register value 9 and 10.
0009: 0F00 1000BASE-T Control Register : 0000 1111 0000 0000
000A: 3C00 1000BASE-T Status Register : 0011 1100 0000 0000 -- From this looking at bit 9 and bit 8 on the register 9. Here bit 8 and 9 is set to 11 which means 2960 will advertise itself as 1000 with full duplex.
On looking at register 10 we should be looking into the bit 10 and 11. Here both the bits are set (11). Hence 2960 thinks the 6500 has advertised it to
be 1000 full capable.
Perform the same on 3750 as well and find the problematic switch.Most of the time reseating the cable will resolve the issue.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...