We're working with a metro ethernet provider to bring up a new multi-point connection between our sites. Currently we're just trying to get it working with two sites. As a simple test I've plugged in an HP switch at either end using an untagged, layer 3 addressed VLAN port.
- I can't ping between the devices on the new link
- I can ping between the devices using a known-good point-to-point ethernet link
- The provider claims that using testing equipment, the metro ethernet circuit passed all layer 2 connectivity tests.
- This is an ethernet product from the provider so I assume that means the tests were layer 2 ethernet tests. I also asked questions about ethernet frame sizes, etc so I think it's a safe assumption.
- Wireshark traces show a provider-owned device firing off several 802.1ag "CFM" protocol, "continuity check messages". The provider confirmed this is their hand-off device (that my switch is plugged into) by MAC address.
- Assuming my metro ethernet circuit is implemented with VPLS, should I be seeing these messages (described in #4 above) from the provider equipment on my circuit or should these be "out-of-band" (therefore a configuration problem)?
- Assuming our metro ethernet circuit is implemented by VPLS, what would block layer 3 traffic but allow layer 2 connectivity?