2960S - no connectivity to interface fa0 mgmgt?

Hi people,

I'll try to make this short!

I have a pair of 2960S stacked (LAN basic WS-C2960S-48TS-L to be exact) toggle 12.2 running (58) SE2 configured with multiple VLANs.  No of them have VLAN interfaces active L3 and the switch can therefore be managed by the management port fa0 (via https/ssh) and the console.

The problem I have is the fa0 connectivity fails, depending on where I'm ping of. For example:

Port 2960 (fa0) MGMGT--> switch upstream<-- 2960's="" vlan="" 100="" (gi1/0/26)=""><-- client="">

|

|

Rest of LAN

Pings to fa0 LAN or switch upstream - PASS

Pings to fa0 VLAN100 customers - FAIL

Pings to rest of LAN of VLAN 100 customer - PASS

Lets say we extend the above as follows:

Port 2960 (fa0) MGMGT--> switch upstream<-- 2960_vlan_100="" (gi1/0/26)="" |="" 2960_vlan_100="" (gi1/0/28)=""><-- downstream="" switch=""><--  dsktp="">

|

|

Rest of LAN

Same results as the initial installation, but additionally:

Pings to fa0 customer switch downstream - FAIL

Pings to rest of LAN switch/clients downstream - PASS

So I think that what is happening is that the 2960 detects fa0 MAC resolves to one of its own interface addresses and therefore do not pass traffic on the switch upstream.  The end result is that the traffic never reaches fa0.  Could someone please confirm if my reasoning is correct here?  And is it possible around this installation problem?

I have attached my configs in a zip if it helps.

Thank you very much

Alistair

EDIT: I would also add that the ARP entries for fa0 are present and correct in the ARP tables to downstream customers.

Edit2: Added 'loopback' command to fa0 with no luck and downloaded Windows EOL RC

Hey, Alistair,.

I believe that the best route to effective management would be to assign an IP address accessible to an available LAN VIRTUAL interface, configure your settings vty and disable Fa0. If security is an issue, you can always also set specific security settings.

Hope this suggestion helped!

Thank you

Mikey

Tags: Cisco Network

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