By default most of routing protocols and label protocols that used to exchange L3 information need to identify each other and it's selecet the highest address number that assigned to any interface and if there is a loopback address it's used it because the loopback interface is most stabel interface that can not down (Manualy only) by general meaning it's the router ID
To have a redundancy for Primary to Backup interface. Better the VPN Tunnel should be created by loopback ip. So in case of any failure of interface the tunnel source & destination can be learnt from the live link..bcoz loopback will not go down.
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.