Has anyone done something similar before? Are the two equpment compatible as far as 802.1q is concerned?
Also from what I understood from the documentation of the switch, a trunk in 3Com is not the usual trunk in Catalyst switches. So basically the port connecting to the router should be added to multiple VLANs to carry VLAN tagged info. Can anyone correct me on this?
Making your VLAN1 subinterface "native" would make traffic from this untagged so this might be why it's working. It's been a long time since I've worked with 3Coms but I think that you can configure trunks on them, rather than just assigning multiple VLANs to the port. I would suspect the 3Com configuration in this case.
In no way did I say this configuratoin would not work. I merely stated that if VLAN 1 is untagged (NATIVE) and that is the only VLAN that is functioning (passing traffic) then the 3Com is not setup properly more than likely. That make more sense?
I have nearly the same problem.In some older IOS even you make a proper configuration router waits a tagged frame from Ethernet interface not the sub interface.Therefore I think this configuration will work.
ip address x.x.x.x x.x.x.x -------------->which is vlan 1 default gateway.
The issue is quite straightforward. I have implemented this type of connectivity for many customers.
By default, Cisco devices maintain a "native" vlan on a trunk, which does NOT carry 802.1Q tagging on frames (although if a frame is received with an 802.1Q tag associating it to the native vlan, the Cisco device accepts it properly).
By default 3Com devices, however, tag all frames sent onto an 802.1Q trunk, and disregard untagged frames received.
The solution is either to encapsulate all vlan traffic on the Cisco (to match the 3Com), or untag the native vlan traffic on the 3Com (to match the Cisco). I prefer the latter. Exactly how you do this depends on which 3Com device you are configuring, and whether through the CLI or by web management.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.