Hi f.taj, In a Ethernet sub-interface (Fast/Gigabit) it's possible. Regards

Thanks,Very useful.  A simple topic but very difficult find out clear information about this.

 Hi MarlonI upgraded the IOS of my router 2801 (as gateway) to 12.4(24)T8. When I restarted the router I watched this message:voice-card 0 ! Warning! DSPs 5 in slot 0 are using non-default firmware from device flash: ! This is not recommended, the IO...

HiTo do this more clear, the devices involved are:Internet Router   --->3550 Switch        -->Nortel Contivity63.169.164.134 -->63.169.164.140--> 63.169.140.136How is the connection scheme? Is 63.169.164.140 configured in interface vlan 100 on switch...