07-24-2008 10:26 AM - edited 03-06-2019 12:26 AM
On a 2950, if I look at the output of show interface for a switchport with nothing connected to it, the result is:
FastEthernet0/1 is down, line protocol is down (notconnect)
As you might expect.
Why is it, if I look at the status of an L2 switchport on a 6500, the interface is up/down when nothing is connected to it?
FastEthernet3/1 is up, line protocol is down (notconnect)
07-24-2008 10:39 AM
Replace the cable
Also, if you decided to use speed/duplex setting in the switchport config, remember to use xover cable as the 'auto-mdix' feature is disabled when forcing the speed/duplex.
Auto-mdix only works in auto/auto.
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Edison.
07-24-2008 11:25 AM
Hi,
The ports all work when something is connected - I was wondering why the status for a 6500 L2 port that has *nothing* connected to it shows as up/down. I was assuming it was some platform-specific thing.
07-24-2008 11:37 AM
The ports all work when something is connected
Like a workstation?
A workstation will work with a normal patch cable.
Switch-to-Switch connection requires a crossover cable. You can use a regular cable but both switches must be configured for auto/auto on their speed/duplex setting and they must support auto-mdix.
Please get yourself a crossover cable and try the inter-switch connection again.
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Edison.
07-26-2008 02:11 AM
Sorry, I'm not really explaining this very well!
I'm not worried about connecting a switch to a switch or a switch to a workstation or anything like that.
I'm looking at the state that a switchport is in when nothing is connected to it at all. It is a general query - I don't have a specific problem.
For instance, if a port (on two unrelated switches) has a basic configuation like this:
2950:
switchport mode access
switchport access vlan 10
6509:
switchport
switchport mode access
switchport access vlan 10
And - while there is nothing plugged into either - the status of the port on a low-end switch like a 2950 will be down/down (notconnect), and the status of the port on a high-end switch like a 6500 will be up/down (notconnect).
I was just wondering whether there was a general reason for that.
07-26-2008 09:24 AM
And - while there is nothing plugged into either - the status of the port on a low-end switch like a 2950 will be down/down (notconnect), and the status of the port on a high-end switch like a 6500 will be up/down (notconnect).
I haven't seen that issue here with the 6500s.
If nothing is connected, it shows down/down.
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Edison.
07-27-2008 05:07 AM
Oh right - thanks for checking.
I Googled it just now - the only thing I found was this:
cisco@groupstudy.com/msg43889.html')">http://www.mail-archive.com/cisco@groupstudy.com/msg43889.html
> > I don't think it's just Fast Ethernet. I've seen "Slow" Ethernet report
> > that the interface is up, down when nothing was attached. It seems to
just
> > be an indication that the interface passed a hardware check.
> >
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