I am trying to implement the configuration shown below, but after reading some more information I am confused if better using ISL. Both devices are Cisco switches, a 3750 and 4507R. By now they will hold just one connection, a giga link, but later the 3750 will be connected to other 4507R wich is connected through a 2gigs port-channel with the first 4507R I mentioned before.
Pleas help me to decide, ISL or dot1q?
description **** 3750 to 4507R ****
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 4,50
switchport trunk native vlan 4
switchport mode trunk
logging event trunk-status
udld port aggressive
storm-control broadcast level 30.00
storm-control multicast level 30.00
storm-control action trap
spanning-tree guard loop