SEO
vBulletin Search Engine Optimization
| |||||||
| Register | FAQ | Members List | Calendar | Search | Today's Posts | Mark Forums Read |
02-18-2008, 07:45 AM
| ||||
| ||||
 Re: Idea: link status on IFT_8021_VLAN On Sun, 10 Apr 2005, Alexey E. Suslikov wrote: > If physical interface has no link, it is 100% true, what > there will be no any frames on VLAN interfaces associated > with this physical interface. And vice versa: if parent > physical interface is "active", it is 100% true, what VLAN > interface can see frames. The second case is not 100% true. You are assuming that an 'up' interface is configured for a VLAN trunk on 'the other side' and that the trunk configuration includes the VLANs that you are interested in seeing on your OpenBSD box. Example: If you plugged the port into a non-trunked port, you would then show all of your vlan interfaces as up, despite no tagged frames entering the interface. I do think that some basic awareness would be good, but you cannot assume too many things when there are configuration knobs that can be changed on the other side. (since this would influence other things). The best way is to rely on something at a higher layer that communicates over that link to a neighbor/peer to determine if it is operating properly. OR: Watch the incoming traffic on the physical interface and look for something with the VLAN tag, and mark the vlan interface as 'up' that has the matching tag (the hard part there is when to decide that it is 'down'). cheers, -- jason      |
Linear Mode
