You want to route traffic between two newly created virtual routers without the use of logical
systems using the configuration options on the SRX5800. Which two methods of forwarding,
between virtual routers, would you recommend? (Choose two.)
A.
Connect a direct cable between boo physical interfaces, one in each virtual router and
use static routes with the next-hop command.
B.
Use a static route to forward traffic across virtual routers using the next-table option.
Enable the return route by using a RIB group.
C.
Create static routes in each virtual router using the next-table command.
D.
Use a RIB group to share the internal routing protocol routes from the master routing
instance.
I would say B and C
A is used in LSYS case
it says “Which two methods of forwarding” so A and C is correct. option A also works on inter-VR
We can NOT say C as it has next-table in both VRs which will make loop and will not committed if you do it in both VRs
We can Not say D as it Share routes from the master routing instance which is wrong.
So it is A , B .
The use of next-table from one routing instance (VR1) to another routing instance (V. VR2) is allowed only in one direction, not in both directions. This to prevent any route lookup loops. The network subnets do not need to be the same.
As an alternative, use either Rib-groups or the Policy option to share routing information between routing instances. Please refer to KB19787:Importing Routes to and from virtual routers on SRX and J Series.
https://kb.juniper.net/InfoCenter/index?page=content&id=KB12985&actp=search
AB 100%