[c-nsp] Vlan interface vs. sub-interface

Nate tincan at gmail.com
Mon Mar 31 14:23:25 EDT 2008


I'm trying to put together a table of advantages (and disadvantages)
of a vlan interface (SVI) vs. a sub-interface of a physical port. So
far, I have the following.

SVI
----
Advantage:
-Ability to add redundant link to the L3 interface
-Better counter and statistics displayed through CLI

Disadvantage:
-Need to be mindful of Spanning Tree issues on redundant links
-The number of SVI supported maybe limited dependent on platform?



Physical port sub-interface
---------------------------------
Advantage:
-Easier to configure and supported on more platforms?


Disadvantage:
-Inability to add L2 redundant links
-Statistics on CLI limited
-Bandwidth limited to physical port


Are there more significant advantages/disadvantages (e.g. buffer
limit, queue depth) that I'm missing?

Thanks,
Nate


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