first up I'm a beginner with cisco devices! We recieved out 1st Cisco 2960's today and began to setup the device using the express setup. Input all correct IP/Subnet/Gateway/pwd etc and all went ok. We then connected two 2960's via OM3 and the SFP's that were ordered with the units. Connected them up and I have connectivity between the two through the SFP (green lights on both ends). One of the switches has an uplink from a 3com 4200G via cat5, we tested the connectivity to the network on this switch and it is doing its job. However, the switch which is connected solely via the SFP is not communicating. On the 3Coms the SFP port is shutdown by default and it needs to be enabled. Is there a similar problem occuring here? What are the commands for correctly configuring the SFP ports on both switches, bearing in mind they are on the same vlan 1 (default).
Any help is greatly appreciated!
At first glance I can't see anything wrong (I did stay up rather late last
night so I'm not at my best today). So, I would recommend applying the
following configuration under the interfaces that are connected to each
other by the fibre
interface gig1/0/x - where x is your trunk connection
switchport trunk encapsulation dot1q
switchport mode trunk
This way we can be sure that the trunk is set, although it should have
After that, on both switches, do a 'show ip interface brief' and ensure that
the link is up for the interfaces in question.
Then do a ping to from each switch to the other.
Let me know how you get along.
On 15 August 2010 06:20, murraybridgehs