Actually, that's not correct. The original specification for VLANs from what I understand mandates that only one VLAN can be assigned to a port, but manufacturers such as 3COM decided to do otherwise and support multiple VLANs per port. Cisco responded by creating (on certain switches such as the Catalyst 2900XL) an administrator to configure a port to be a member of more than one VLAN at a time when using a membership mode known as "Multi-VLAN". A Multi-VLAN port can belong to up to 250 VLANs; the actual number of VLANs to which the port can belong depends on the capability of the switch itself. Although the concept is similar, this membership mode is different than "trunking". The caveat to this feature is that the Multi-VLAN membership mode cannot be configured on a switch if one or more ports on the switch have been configured to trunk.
For more information on this feature, search Cisco's website using the keyword phrase "switchport multi". As for answering NetEng's question--I can't quite determine where multiple MAC addresses share the same switch port. Could you identify which switch that is? -- Leigh Anne > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > Dennis > Sent: Tuesday, October 23, 2001 3:48 PM > To: [EMAIL PROTECTED] > Subject: Re: MAC address and VLANs [7:23950] > > > Cisco will recognize multiple macs on a single port but they must > all be in > the same vlan. Vlan assignment is per port. Your other option > would be to > replace the non cisco hub with a cisco switch which is trunked to the main > switch. > > -- > > -=Repy to group only... no personal=- > > ""NetEng"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > Here's my situtation. I have a corporate PC with an IP address of > 10.10.x.x > > and in the same office (and same physical network) another > device with an > IP > > address of 192.168.100.x Both devices are connected to a small > hub/switch > > which in turn is connected to a cisco switch. Can I have the > 10.10.x.x be > > apart of one vlan and the 192.168.100.x be a member of another or the > > default vlan? Can cisco switches recognize multiple MAC addresses on a > > single switch port (if so, how many?) and be smart enough to know which > vlan > > which MAC address belongs to? This would save me hours (otherwise I have > to > > run cable for connections to our corporate network and > connections to our > > test network in every cube :-( ). TIA > > > > PS I understand the best way to do this would be to connect each device > into > > the cisco switch, but I only have a single cable run to each cube/office > > > > > > (corporate pc)10.10.x.x > > | > > PC PC (test network) 192.168.100.x > > | | > > \ / > > \ / > > SWITCH/HUB (non-cisco) > > | > > | > > CISCO SWITCH > > VLANs > > -------- ---------- > > | | | | > > | corp | | test | > > -------- ----------- Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=23965&t=23950 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
