[c-nsp] testing physical links between production and non-production switches

[sam avi]

Hi, 

I have a set of access switches (3750s), which are purely in a layer 2 setup, i.e. connect uplink to core 6509s, which are setup as root and backup spanning-tree roots. 

I need to connect another set of switches to the above 3750s in a migration, but would like to be able to test the physical layer before-hand to avoid surprises on the migration day. 

One "safe" way I thought I could do this interim step was to make the switch ports into routed ports, i.e "no switchport". This should clear off any spanning-tree hiccups when I'm doing a physical level test. Once this goes ahead ok, then I plan to shut down the ports and later configure them as standard L2 ports. 

Any comments? Is there any other way I can do such an interim test in a "safe" way, i.e without affecting other production traffic on the 3750s?


---sam

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