Redundancy Edge Sw

melwin.uk · ‎05-06-2010

Hi

2960 needs reachability to backbone-sw when link between 2960 and 4509 is down

4509 is the server, All 2960 will be VTP client

On 4509

interface gi 0/1

switchport trunk encap dot1q

switchport mode trunk

interface gi 0/2

switchport trunk encap dot1q

switchport mode trunk

interface gi 0/3

switchport trunk encap dot1q

switchport mode trunk

On 2960 ( 1st floor )

interface gi 0/1

switchport trunk encap dot1q

switchport mode trunk

interface gi 0/2

switchport trunk encap dot1q

switchport mode trunk

On 2960 ( 2nd floor )

interface gi 0/1

switchport trunk encap dot1q

switchport mode trunk

interface gi 0/2

switchport trunk encap dot1q

switchport mode trunk

On 2960 ( 3rd floor )

interface gi 0/1

switchport trunk encap dot1q

switchport mode trunk

interface gi 0/2

switchport trunk encap dot1q

switchport mode trunk

Any additional configuration is needed to avoid loop if both connection port is up on 2960.

Thanks

Mel

Jon Marshall · ‎05-06-2010

Melwin

No additional configuration needed as STP will automatically block one of the uplinks. I would recommend running RSTP rather than standard PVST+ as it is a lot quicker to failover and make sure the 4500 switch is STP root for all vlans.

Jon

melwin.uk · ‎05-06-2010

Hi

Do I need additional configuration on 4509 for RSTP then mentioned.

Is any config needed on 2960 edge switches for RSTP

Switch(config)# spanning-tree mst configuration

Switch(config-mst)# instance 1 vlan 10-20

Switch(config-mst)# name region1

Switch(config-mst)# revision 1

Jon Marshall · ‎05-06-2010

melwin.uk wrote:

Hi

Do I need additional configuration on 4509 for RSTP then mentioned.

Is any config needed on 2960 edge switches for RSTP

Switch(config)# spanning-tree mst configuration

Switch(config-mst)# instance 1 vlan 10-20

Switch(config-mst)# name region1

Switch(config-mst)# revision 1

#

Melwin

The above is config for MST not rapid-pvst+. See the attached docs for rapid-pvst+ config -

4500 -

4500 rstp

2960 -

2960 rstp

Jon