I am not sure, but logic seems to dictate that both interfaces belong to the
same layer 2 network. The way I am picturing it is like this:
In any regular layer 2 switched network, you can have many devices of the
same type. You could have many clients or servers, or printers or even
routers. So why wouldn't the same hold true for your scenario? Now, when
you bring it up to layer 3, you definitly have two distinct subnets working.
The differnece would lie in how your end users are configured, ie- Which
interface IP do you assign as their default gateway...
Sorry for the oversimplification. It's my first day on the list and I am
trying to get involved.
Joseph Ezerski
LMKI Communications
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, October 10, 2000 12:47 PM
To: [EMAIL PROTECTED]
Subject: ISL VLANS on a router - bridged?
On a switch, if a unique VLAN ID appears on more than one trunked
interface, that VLAN is part of the same layer 2 network and broadcast
domain across all interfaces where it appears, based on the VLAN number.
Is this also true on a router? That is, if I have the following
configuration, what happens? Do VLAN 2 on switches connected to
both interfaces see each other?
interface FastEthernet0/0.2
description VLAN 2 to switch A
encapsulation isl 2
ip address 192.168.1.254 255.255.255.0
no ip redirects
no ip directed-broadcast
interface FastEthernet0/1.2
description VLAN 2 to switch B
encapsulation isl 2
ip address 192.168.2.254 255.255.255.0
no ip redirects
no ip directed-broadcast
Two separate subinterfaces of two separate physical interfaces connected
to two different LANs, but with the same ISL encapsulation "color". Are
they bridged? Would the IP address ranges both appear on both LANs?
Can't find this in CCO anywhere.
--
Jay Hennigan - Network Administration - [EMAIL PROTECTED]
NetLojix Communications, Inc. NASDAQ: NETX - http://www.netlojix.com/
WestNet: Connecting you to the planet. 805 884-6323
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