From: ccie candidate (ccie1@xxxxxxxxx)
Date: Wed Aug 07 2002 - 07:30:48 GMT-3
i didnt get you question completely .
however let me share some ideas .
when you do IRB , you can bridge the protocol or route it with the option of al
lowing the bridged interfaces to talk to the routed ones for the same L3 protoc
ol .
when you define L3 address on the interface , you simply telling the interface
that you are routing the protocol on it ..not bridging it .
for the bridged interfaces , creating BVI interface will represent them to the
routed interfaces .
about the Vlan question , by definition Vlan is NOT separate L3 address space ,
there is options where you can run multiple subnets on the same vlan (multinet
ting ) and secondary IP addresses .
vlan is separate broadcast domain .
if you can clarify you question more i can have more idea
--On Tue, 6 Aug 2002 19:24:08 EbonyGuru wrote: >Hi guys, > >Do Ethernet interfaces and Trunking FastEthernet isl subinterfaces on a >router doing irb need to share the same layer 3 address? > >I am asking this cos of scenarios where you are bridging across multiple >vlans. Is a vlan not by definition a separate layer 3 address space? If this >is so, how can you have them in the same bridge group? > >TIA, >E'Guru
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