From: Mohammad Saeed (mzsaeed@gmail.com)
Date: Tue Nov 06 2007 - 19:07:53 ART
Hello Everybody,
Gigabit Ethernet Interface on 3750 connecting to fa0/0 of 2811, if we
hardcode both ends to 100Mbps and Full Duplex they shall be fine? Am I
right?
OR if we put both end to Speed auto and Duplex Auto, they shall be
able to negotiate maximum like 100 and full duplex, right?
Now in my case, Router's fa0/0 has hardcoded 100 and full duplex and
Switch interface was speed auto and duplex auto and as normal behavior
as other end was hardcoded, switch interface fall back to half duplex
and 100. Now when I hardcoded switch interface, to 100 and Full
duplex, it went to Interface Down, Line protocol Down, I tried shut
and no shut on the interface, but it went to Interface
Administratively down to again same Interface Down, Line protocol
Down. Can any one tell me what could be the problem, here is sample
config:
On Switch
interface vlan9
ip address 1.1.1.1 255.255.255.0
interface gigabitethernet 0/1
switchport access vlan9
speed 100
duplex full
On Router:
interface fa0/0
ip address 1.1.1.2 255.255.255.0
speed 100
duplex full
In the above scenerio as I mentioned above, switch interface will be
interface is down line protocol is down and router interface will be
interface is up and line protocol is down state.
Right now we put router to half duplex and 100 and switch to auto and
its falling to half duplex and 100, so no problems, but we want to
have 100 and full duplex to get better link speed.
Any idea, whats the problem?
Regards,
Mohammad Zahed Saeed
This archive was generated by hypermail 2.1.4 : Sat Dec 01 2007 - 06:37:28 ART