From: Pieter Jordaan (pieterj@is.co.za)
Date: Wed Oct 02 2002 - 02:42:46 GMT-3
Group
How do you test certain things if the switch port is still powered when it
is shut down, IE: the attached router interface stays up even when you shut
the 3550 switch port.
Set port disable, disables the port. Shut just prevents the port from
passing traffic but the port is still powered.
Guys I think this is a serous problem. If you have to use the backup
interface command on an ether interface but you can't make that interface go
down/down how do you test it?
Also when I debug for an IPX network number on the network I do a debug IPX
packet. I found the debug often doesn't show anything unless you drop the
link to the remote router and then bring it back up. But if shutting the
port doesn't take down the interface on the remote router, the router
doesn't re-broadcast onto the Ethernet segment and you don't get anything
from it.
I am sure many people will think of many reasons why they need to shut down
a port on a device.
Now in either of these scenarios if there may be sections dependant on the
outcome of these tests, which means that you could lose a lot of points, on
the other hand maybe you don't have any requirements in the lab to configure
something like this or your router plugs directly into the other router, or
maybe I'm just pulling this whole thing out of proportion and I worry about
too many little thing.
So please tell me what to do, but don't come back with answers like did you
check the TTL or time-outs etc. the fact is that the port stays powered and
the remote device attached to the switch still has a link lite, the
interface is just not passing traffic. Maybe cisco must change the command
on the switch from shut-down to block, cos that will be a more realistic
description.
And please tell me if I worry about too many little things.
TIA
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