Port Mirroring by SPAN or RSPAN on an HP C7000 Blade
This is just a heads-up to hopefully save someone else a bit of time and pain... but the HP Virtual Connect doesn't support SPAN or RSPAN to mirror traffic from a physical device into the chassis to, for example, a Virtual Machine. Basically, Port Mirroring, such as through SPAN or RSPAN, uses unicast to duplicate network traffic from a source port or ports onto a destination port. This technique is useful for troubleshooting, in case you can't get a packet capture running on either end of a network flow, or for monitoring (as was our intended use case). IANANG (I Am Not a Networking Guy), but my understanding is that the problem is due to the nature of a SPAN port and how those packets look to the Virtual Connect. When Port Mirroring is configured, all traffic is duplicated and sent out to the Virtual Connect. These packets are not changed in this process, keeping their original source and destination MAC addresses; the SPAN port is forwarding these packets t...