[c-nsp] Catalyst 2950 freezing

[Henry-Nicolas Tourneur]

Hello,

Switch configuration for customer ports is below.
If you have any recommendations, they are welcome :-)

Current configuration : 190 bytes
!
interface FastEthernet0/1
 description #customer: CUST01i_L2 [4M]
 switchport access vlan 115
 load-interval 30
 speed 10
 duplex full
 no cdp enable
 spanning-tree bpdufilter enable
end

SWITCH#sri fa0/2
Building configuration...

Current configuration : 167 bytes
!
interface FastEthernet0/2
 description #customer: CUST01v_L2 [1M]
 switchport access vlan 340
 load-interval 30
 no cdp enable
 spanning-tree bpdufilter enable
end

And for the switchport:

SWITCH#show int fa0/1 switchport 
Name: Fa0/1
Switchport: Enabled
Administrative Mode: dynamic desirable
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: On
Access Mode VLAN: 115 (CUST01i)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none
Administrative private-vlan host-association: none 
Administrative private-vlan mapping: none 
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Appliance trust: none

SWITCH #show int fa0/2 switchport 
Name: Fa0/2
Switchport: Enabled
Administrative Mode: dynamic desirable
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: On
Access Mode VLAN: 340 (#mgt/voice)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none
Administrative private-vlan host-association: none 
Administrative private-vlan mapping: none 
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Appliance trust: none


-----Original Message-----
From: Christian Kratzer [mailto:ck-lists at cksoft.de] 
Sent: lundi 19 décembre 2011 11:56
To: Henry-Nicolas Tourneur
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Catalyst 2950 freezing

Hi,

On Mon, 19 Dec 2011, Henry-Nicolas Tourneur wrote:

> Hi all,
>
>
>
> For one of our customer, we'v a Cisco Catalyst 2950 located in their
> premises, through this switch we deliver an internet access as well as a
> voice service.
>
> The switch has a really basic cfg: 3 ports connected, 1 trunk and 1 port
per
> service.
>
>
>
> From time to time, the switch freezes completely (all services down,
switch
> unreachable).
>
> Obviously, we already swapped the switch several times, check the logs,
> errors counters . and nothing solved our issue.
>
>
>
> Even more weird, this morning we saw a traffic spike at 50mbps (services
are
> 4mbps and 1mbps) on every ports while they are inside separated VLAN (so
> even an L2 loop shouldn't do this).

can you show how the customer facing ports have been configured ?

Also you might want to check the output of "show interface Gi0/x switchport"
and look for config issues in the current state of the port.

Possible the customer has something strange in their network.


<snipp/>

Greetings
Christian

-- 
Christian Kratzer                      CK Software GmbH
Email:   ck at cksoft.de                  Wildberger Weg 24/2
Phone:   +49 7032 893 997 - 0          D-71126 Gaeufelden
Fax:     +49 7032 893 997 - 9          HRB 245288, Amtsgericht Stuttgart
Web:     http://www.cksoft.de/         Geschaeftsfuehrer: Christian Kratzer