【JUNOS】review ISIS

1. 需求部分

1. The System ID (SysID) must be based on the router’s IPv4 lo0 address;

2. Loss of any individual interface must not totally disrupt the router’s IS-IS operation;

3. The IPv4 lo0 addresses of all routers must be reachable via IS-IS;

4. The link between r3 and T1 must appear in area 49.0001 as an intra-area route. Ensure
     that no IS-IS adjacencies can be established on this interface;

5. The loopback addresses of level 2 routers may not appear in a level 1 area;

6. Only one adjacency per router pairing is permitted;

 

7. Backbone area authenticates both hello and LSP exchanges using MD5 with a key value of jni ;

8. Area 49.0002 uses a plain text password of jnx for hello authentication only;

9. No routing disruption can occur in the backbone when adding authentication;

 

10. Leak level 2 loopback addresses into area 49.0003 and ensure optimal routing to these prefixes.

11.  Summarize area 49.0003 addresses into the backbone.

12. Maintain connectivity between all router loopback addresses.

 

13. Redistribute the 10.0.5/25 subnet from both r1 and r2 so that level 2 routers display a
      route metric of at least 500.

14. r5 must be able to load balance to the 10.0.5/24 prefix.

15. Redistribute the IS-IS default route from both r6 and r7 to the OSPF router.

16. Redistribute OSPF routes 192.168.0/24 through 192.168.3/24 into area 49.0002 from
both r6 and r7.

17. Ensure that the OSPF router, r6, and r7 can reach destinations on the 10.0.5/24 subnet.

18. Except for r5, no single point of failure can isolate the OSPF router from reaching the
      10.0.5/24 subnet.

19. Continue to advertise the area 49.0003 summary while suppressing more specific prefixes,
      except for the 10.0.5/24 route in accordance with the first requirement.

 

20. Ensure that r2 cannot reach destinations outside of area 49.0003 while keeping all its IS-IS
adjacencies up and without modifying its routing-options stanza.

21. Configure r6 with a level 1 priority of 0.

22. Ensure that r5 never generates a non-0 selector byte LSP for the 10.0.8.8/30 network.

23. Configure the r3-r5 ATM link so that flooded LSPs are spaced at least 300 milliseconds apart.