We run a fairly large wireless network. Instead of giving out DHCP and letting everybody at everybody else’s throats, we end up running PPPoE to the clients machine or router. This has its own set of issues, but the benefits have outweighed them since we’ve started.
We’ve recently started getting some “678 errors” on some clients off of a particular tower. This error is what appears with those using WindowsXP to connect. Turns out the issue was due to a default pppoe limit that Cisco has.
We currently have a NPE-G1 that we terminate our PPPoE sessions on. Probably around 10-20 VLANs with anywhere from 10 to 120 sessions per VLAN.
So for those that do PPPoE termination on a large scale, be warned. In the “bba-group pppoe” profile you will want to set the “sessions per-vlan limit” to something GREATER than 100. 100 is the default. Quite a low default, and was a pain to figure out. I’ve since set all of our bba-groups to 1024.
So see-yah PPPoE 678 errors. It’s been fun. Truly it has.
