The me1 interface is an out-of-band management interface on the 4000, as you
may know. Unlike the in-band sc0, which is an internal logical interface
that particpates in ordinary switching functions, including CDP and spanning
tree, the me1 interface is a physical Ethernet interface that is used for
configuration and problem resolution.
Normally, the me1 interface is configured to be in a different subnet than
the sc0 interface, allowing both interfaces to remain up. However, both
interfaces may be configured in the same subnet or with the same IP address,
but the sc0 interface will shut down. Interface me1 always takes precedence
in this instance. For example, if you already have the sc0 interface
configured with an IP address of 172.16.84.17 255.255.255.0, and you try to
configure the me1 interface in the same subnet (172.16.84.18 255.255.255.0),
you will see the following messages:
Switch-A> (enable) set interface me1 172.16.84.18 255.255.255.0 172.16.80.255
This command places me1 and sc0 into the same ip subnet.
The sc0 interface will be automatically configured down if necessary to
resolve the conflict.
Do you want to continue (y/n) [n]?y
That's the issue they were probably trying to address with that confusing
comment about "conflicts."
_______________________________
Priscilla Oppenheimer
www.troubleshootingnetworks.com
www.priscilla.com
Tony Chen wrote:
>
> I am study for the CIT:
>
>
> Possible problem and recommended solution: Switch cannot
> communicate with another device
>
> Another problem could be with the actual configuration of the
> interface. Make sure the interface you are connecting to (sc0
> or me1) is UP (use the show interface command to check). Make
> sure the IP address, subnet mask, and VLAN membership of the
> switch interface (sc0 or me1) is correct (use the show
> interface command). To prevent conflicts, make sure the me1 and
> sc0 interfaces are configured with IP addresses and subnet
> masks in different subnets (use the show interface command to !
> check), or disable one of the interfaces using the set
> interface {sc0 | me1} disable command.
>
> Question:
>
> make sure the me1 and sc0 interfaces are configured with IP
> addresses and subnet masks in different subnets to prevent
> conflict. What kind of conflict could have occurred?
>
> Thanks for the help.
>
> Tony
>
>
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=55227&t=55173
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