The FE interfaces that support VLAN trunking all use a chipset that supports trunking. Not all router models and not all modules that have 100Mbps interfaces use the required chipset. The best way to determine whether a router or module supports trunking is to read the release notes for the hardware. There is always a grid that lists the versions of IOS that are supported on that hardware along with the individual features that each version supports. Its a little tedious, but it can help prevent buying hardware that doesn't do what you assume it should do. I recently checked on the 1700 series and the 2620/2621 and discovered that the 172x/175x does NOT support trunking while the 262x does. I am not sure about the new rack-mount 1760s. It is also rumored (urban legend?) that there are one or two 10Mb interfaces on some router/module that supports trunking. I wouldn't attempt that in a production environment, but in a study lab it would be cool.
My $0.02, John Dorffler CCIE #6677 ""TMS"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hello > > Did 10/100 Ethernet interfaces build in above Cisco routers have > any diffrences between NM 10/100 Ethernet interfaces (ex.NM-1FE2W) ? > I talking with friend, and He said that build in Ethernet intefaces > didn't support VLAN encapsulations like dot1q/ISL. My question > is regarding interfaces in: > > 1720 > 2620 > 3661 > 7200VXR I/O Controller with 1 FastEthernet > > -- > TMS Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=45152&t=45152 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
