CCNP(300-101)题库V2.0（2017.8.17）错题贴

willyou

题库错误，不知道是否还有其他错误答案，特开错题贴。

$ m/ W; q. b, ^- h" m; dQUESTION 177
' E2 k0 b- U9 N% X2 m, t6 v! _What does the command clear ipv6 ospf process accomplish?
& B; l0 m4 o) ^' q# E6 g, T5 dA. The OSPF adjacencies are cleared and initiated again.
B. The route table is cleared. Then the OSPF neighbors are reformed.
) V; z. w- o9 ~, j" VC. The shortest path first (SPF) algorithm is performed on the LSA database.
D. The OSPF database is repopulated. Then the shortest path first (SPF) algorithm is performed.
Correct Answer: A

这道题应该选择D。
0 E0 E2 Z2 \, M. w; \Usage Guidelines

When the process keyword is used with the clear ipv6 ospf command, the OSPF database is cleared and repopulated, and then the shortest path first (SPF) algorithm is performed. When the force-spf keyword is used with the clear ipv6 ospf command, the OSPF database is not cleared before the SPF algorithm is performed.

Use the process-id option to clear only one OSPF process. If the process-id option is not specified, all OSPF processes are cleared.

7 X( m- c4 E# t" M

byronyj

感謝樓主！

lini1984

完全同意 ：）

ryanyue11

嗯，闫辉大神的视频也是这样说的。

netveteran

I think answer A is correct. You can test with Cisco Packet Tracer, first make a network with OSPF running.
1. show ip ospf neigh
2. clear ip ospf process
7 V+ i+ E' ^) Q, K2 F7 T' O3. show ip ospf neigh
7 b4 l2 v& G  M/ }0 j: }You will find that neigh table is empty after step 2. later on there will be neighbors.

netveteran

Router#show ipv6 ospf neigh
0 o6 ?9 \/ Q4 [8 _) y. T+ L' F
Neighbor ID     Pri   State           Dead Time   Interface ID    Interface
5 Q2 \/ C' w1 x  g# n172.16.10.1       1   FULL/DR         00:00:32    1               GigabitEthernet0/0
4 k" S. J/ c6 R; `Router#clear ipv6 ospf process
# U( e& u4 ?- RReset ALL OSPF processes? [no]: y
3 o7 s; q+ M* ?5 i7 ~; v: D
Router#
00:07:40: %OSPFv3-5-ADJCHG: Process 1, Nbr 172.16.10.1 on GigabitEthernet0/0 from FULL to DOWN, Neighbor Down: Adjacency forced to reset
/ b. h1 o7 D6 q* h/ ]# s' Y6 O
  y% K! u! a' d, w, |00:07:40: %OSPFv3-5-ADJCHG: Process 1, Nbr 172.16.10.1 on GigabitEthernet0/0 from FULL to DOWN, Neighbor Down: Interface down or detached
1 J# T! o7 [& i* `/ }' J, Ishow ipv6 ospf neigh
Router#show ipv6 ospf neigh

2 [0 a, n$ Q' ]2 I1 _3 xNeighbor ID     Pri   State           Dead Time   Interface ID    Interface
172.16.10.1       1   EXSTART/DROTHER 00:00:39    1               GigabitEthernet0/0
& B) E. J' n( e5 J% T: MRouter#show ipv6 ospf neigh

Neighbor ID     Pri   State           Dead Time   Interface ID    Interface
* }" }' b, F5 G2 F+ [172.16.10.1       1   EXSTART/DROTHER 00:00:38    1               GigabitEthernet0/0
Router#
00:07:48: %OSPFv3-5-ADJCHG: Process 1, Nbr 172.16.10.1 on GigabitEthernet0/0 from LOADING to FULL, Loading Done

Router#

netveteran

Correct answer is A!!!!

陳罐西

谢谢 楼主