I'm implementing mulitple vlans in APs that required 802.1q trunking. But the existing LAN infrastructure is running ISL. Can both ISL and 802.1q co-exists? Someone mentions to me Cisco does not recommend that as there could be spanning tree issues but I can't seem to find the link.
You can use ISL and 802.1q in the same network. The spanning tree issues arise mainly while 802.1q uses one spanning tree for the trunk link. The BPDU's are by default transported via VLAN1 (Cisco implementation) and the problems could begin when this is not taken into account. Especially in a multivendor network. The above is not nescessarily true when you are using only Cisco equipment. In that case, your 802.1q link can support PVST+ (Per Vlan Spanning Tree), the cisco add-on to the standard.
There are lots of documents about spanning tree on the Cisco-site. When you do a search on spanning tree or PVST+ you will most likely find what you need.
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.