comment in-line:
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Monday, February 17, 2003 2:10 AM To: [EMAIL PROTECTED] Subject: RE: Does MLS (Layer 3 switching) require VLANs? [7:63147] DEar Stefen, you are doing a bit of confusion: > so does layer 3 switching require the use of VLANs to actually do > the switching? It's true the contrary case: the Vlans requires L3 to be routed, or, in other terms, to comunicate each others. The L3 switching has no sens without VLAN > Say for instance I have 2 hosts on the same layer 3 switch, but the > two hosts are on 2 different IP subnets (No VLANs are defined). That's not possible! if you are talking about 2 IP subnet, than: ------------------------- actually it is by doing secondaries, but i would highly recommend doing vlans if possible. keep it clean and simple. /vicky 1) you are talking about 2 subnet in 2 distinct sides of a router 2) you are talking about 2 Vlans in one L3 switch > Host A wants to talk to host B. Can the switch not look up the > routing info and then know to switch to that port? I am not seeing > where the requirement for the VLAN comes into play. 1) host A and Host B are in two different VLAn: they need the L3 engine to comunicate 2) host A and host B are in the same Vlan but they have IP addresses (be careful .... this anyway a mistake!) who belongs to different VLAN: A can't comunicate with B because A doesn't know the MAC of B ... A can have knoledge of the MAC's of a) the hosts in the same subnet b) the gateway of the A's subnet and B's MAC doesn't match either of the a and b case. Hope this halp you Greetings Luca Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=63160&t=63147 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
