Conference noted::decnis

3540.0. "IP routing and bridging at the same time??" by SNOFS1::63496::CHIUANDREW () Thu Feb 13 1997 22:09

    Hi,
    
    Just want to clarify the bridging and routing of IP on DECnis:
    Customer will migrate bridge network to routing network over time. But
    in order to prove our plan, we have to make IP routing on LAN and
    bridge over WAN:
    
    
    HQ
    -------------------------------- 
                  !    IP subnets: 10.1.1.0 and 10.2.2.0 
    	---------------------
    	!     NIS600        !
    	!                   !
    	-------------------- 
          !            !
    	  !            !
  siteA   !            !   siteB
     -----------   --------
     !         !   !      !
     ! NISA    !   ! NISB !
     -----------   --------
    
    IP subnet       IP subnet: 10.2.2.0
    10.1.1.0	
    
    
    NIS600 with two IP addresses (10.1.1.1 and 10.2.2.1), 
    NISA and NISB is bridging ONLY, so I can have IP devices on SITEA (via
    NISA) talk to devices on HQ on subnet: 10.1.1.0, also IP devices on
    SITEB can talk to devices on HQ on subnet: 10.2.2.0.
    
    Questions:
    1) But I cannot have IP devices on SITEA talk to SITEB, since NIS600 is
    not route between them? If this correct?
    
    2) In HQ, there will be servers (VAX) in subnets 10.1.1.0 and 10.2.2.0,
    so SITEA can ONLY talk to servers in 10.1.1.0 and SITEB can ONLY talk
    to servers in 10.2.2.0, is this correct?
    
    
    Customer have 6-7 remote sites running with DECnises, they will run
    bridge then migrate to routing, once this is tested and proved.
    
    
    PS: DECnis MPC-I card and V3.1-7.
    thanks in advance for help!
    Andrew Chiu - NSIS Sydney
                                     

    You plan will not work. You cannot route/bridge ip, you either have to
    route or bridge ip. So the wan ports will have to be routing if your
    lan ports are routing ip.
    
    Brad