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New Member

Communication between vlans



I have a c2960x switch,  all ports are in vlan1, no IP assigned to that.  I also have vlan100 that I use for management traffic and have assigned it an ip address.  The interface is up but will not reply to any pings, even when I console directly onto the switch.  If I remove the address and add it too vlan1 interface I can ping that ok.  What have I missed?

New Member

Additional info:  It only

Additional info:  It only pings from the console if I have a device plugged into an interface on the switch, as soon as I remove it I can ping anymore.

VIP Purple

Have you set the "interface

Have you set the "interface vlan 1" to shutdown after assigning an IP to the VLAN100 interface?

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New Member

Thanks. Yes I've done that


Yes I've done that already.  Its set as administratively down.  Vlan100 is up, line protocol is down

New Member

You need to add an interface

You need to add an interface into VLAN 100, without any the VLAN will not be in the up state!


New Member

I know that would get me

I know that would get me pinging ok, but the rest of my switches are setup similarly - ie all ports in vlan1, none in vlan100.  IP is assigned to vlan100 and pings ok from the network or console.

this is the sh vlan from a switch that works

whd-c2960G48-MO>sh vlan

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi0/1, Gi0/2, Gi0/3, Gi0/4
                                                Gi0/5, Gi0/6, Gi0/7, Gi0/8
                                                Gi0/9, Gi0/10, Gi0/11, Gi0/12
                                                Gi0/13, Gi0/14, Gi0/15, Gi0/16
                                                Gi0/17, Gi0/18, Gi0/19, Gi0/20
                                                Gi0/21, Gi0/22, Gi0/23, Gi0/24
                                                Gi0/25, Gi0/26, Gi0/27, Gi0/28
                                                Gi0/29, Gi0/30, Gi0/31, Gi0/32
                                                Gi0/33, Gi0/34, Gi0/35, Gi0/36
                                                Gi0/37, Gi0/38, Gi0/39, Gi0/40
                                                Gi0/41, Gi0/42, Gi0/43, Gi0/44
25   Temp-iSCSI                       active
50   DFG-Transit                      active
100  Management                       active
1002 fddi-default                     act/unsup
1003 trcrf-default                    act/unsup
1004 fddinet-default                  act/unsup
1005 trbrf-default                    act/unsup


New Member

There is a command you can

There is a command you can add (not sure off the top off my head) that you can use, but this is the default operation. Have a look at the VLAN configuration on this switch... I think it's Spanning Tree related.


Hall of Fame Super Silver

My first guess at the problem

My first guess at the problem would be that the other switches have a trunk port configured and the 2960x does not have a trunk configured. When there is a trunk port on the switch that will carry VLAN 100 then VLAN 100 will come to the up/up state. But if the 2960x has only access ports in VLAN 1 then interface VLAN 100 will be in the up/down state.