Problem Configuring Access Mode on an Interface on a Catalyst 3500XL

Problem Configuring Access Mode on an Interface on a Catalyst 3500XL
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Subject Author Date
Problem Configuring Access Mode on an Interface on a Catalyst 3500XL tman 05-09-2008
Posted by tman on May 9, 2008, 2:35 pm
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I want to configure several FastEthernet interfaces on a Catalyst
3500XL switch so they will not trunk. I used the following command:

conf t
int fa0/1
switchport mode access

It takes the command o.k. but when I do a sh run it does not show that
the interface is in access mode. Moreover, when I connect another
switch to fa0/1 with at cross-over cable, it trunks.

When I use the same command on a Catalyst 2950 switch, this is what I
see when I do a sh run:

interface FastEthernet0/1
switchport mode access

Am I missing something?

Thanks in advance.

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Posted by Doug McIntyre on May 9, 2008, 3:40 pm
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>I want to configure several FastEthernet interfaces on a Catalyst
>3500XL switch so they will not trunk. I used the following command:

>conf t
>int fa0/1
>switchport mode access

You need to turn off Dynamic Trunking Protocol

int fa0/1
switchport mode access
switchport nonegotiate


Posted by tman on May 9, 2008, 4:56 pm
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> >I want to configure several FastEthernet interfaces on a Catalyst
> >3500XL switch so they will not trunk. =A0I used the following command:
> >conf t
> >int fa0/1
> >switchport mode access
>
> You need to turn off Dynamic Trunking Protocol
>
> int fa0/1
> =A0switchport mode access
> =A0switchport nonegotiate

I tried it but there is no such command as switchport nonegotiate.
The only commands under switchport are:
access
mode
multi
priority
trunk
voice

I tried the following command in interface config mode:

no negotiation auto

It returns the message: This command is not supported for
FastEthernet0/1


Posted by Merv on May 9, 2008, 5:08 pm
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to disable trunking on a 3500XL, try the command

no switchport mode





Posted by tman on May 9, 2008, 6:51 pm
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> to disable trunking on a 3500XL, try the command
>
> no switchport mode

I already tried that one. It doesn't seem to do anything. I can
still plug another switch into the port and it lights up.

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