Help !! Need advice re YP in multi-ethernet LAN config.

[leon howorth]

I am trying to determine the best configuration for SUN Yellow Page master
and slave servers in a multi-ethernet environment. I currently have a
2-ethernet LAN as follows:

ethernet			ethernet
  #1				  #2
  ---			       ---		
   |				|
   |				|
   |				|  |-------|
   |				|-- SUN "B"|  <--YP Slave Server
   |				|  |_______|     (O.S. 3.5)
   |     |---------|		|
   |-----| SUN "A" |------------|
   |     |_________|		|
   |  YP Master and Gateway     |		 
         (O.S. 4.0.1)

Machine "A" has hostname "A" on ethernet #1 and hostname "A-gate" on
ethernet #2. It is running O.S. 4.0.1 and "B" is running O.S. 3.5. 

My question relates to establishment of a third ethernet with another
machine, call it "C" as the gateway between ethernet #2 and the new
ethernet #3. A diagram of the new LAN, without machine "B" for the time
being, is as follows:

ethernet		ethernet		ethernet
 #1			  #2			   #3
-----			-----			-----
 |			|			|
 |			|			|
 |     |--------|       |       |--------|	|
 |-----| SUN "A"|-------|-------| SUN "C"|------|
 |     |________|       |       |________|      |
 |   YP Master and      |      Gateway and ???  |
 |     Gateway          |        running        |
      (O.S. 4.0.1)              (Sys4-3.2)

Machine "C" is chosen as the second gateway machine because it can
accomodate a second ethernet controller and is a faster, larger memory
machine, whereas "B" cannot accomodate a second ethernet connection and is
not nearly as much machine as "C".

Assuming that "A" remains the YP Master -  Would it be advisable to
either: 
(a) Make "C" the new YP Slave instead of the current "B". Is this
advisable considering that "C" is running Sys4-3.2.??  (Whereas "B" is
running O.S. 3.5).

(b) Retain "B" as the YP Slave and not make "C" a YP Slave machine. If
this is true -- where should "B" be located in the network?? 

(c) Use "B" and/or "C" as YP Slaves in some other configuration??

Any responses are appreciated. 

Leon Howorth, HHB Systems, 201-848-8000 ext. 243.
UUCP: ...rutgers!pyrnj!hhb!leonh