本帖最后由 宅男女神 于 2015-11-14 21:33 编辑
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& V- G- Q+ L, c# U$ l# v0 qEIGRP Troubleshooting
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' t/ Q4 [/ L$ E) Y5 F题目拓扑、选项跟题库相同，但是几个路由器给出的配置跟题库不同。
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' S, a3 m$ C6 SQuestion 1
% D8 @% N% M# g: ]/ C( NThe loopback interfaces on R4 with the IP addresses of 10.4.4.4/32,10.4.4.5/32 and 10.4.4.6/32 are not appearing in the routing table of R5. Why are the interfaces missing?8 |4 N* u8 j2 a' V1 B# `/ g5 w
A. The interfaces are shutdown, so they are not being advertised. ( ~8 k" f# y& A" Y7 U
B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5. 0 ?8 V8 `7 Y* g9 e: }! a
C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
0 t) _! b" h, s+ P7 yD. The loopback addresses haven’t been advertised, and the network command is missing on R4.
# H1 |& z+ i9 t$ b3 |2 \1 H# W题库里给的答案是B (AS号不同)
1 U% E& ~) }( ~在考试中show run查到的并不是区域号不同，而是R4没有宣告它的环回地址,也就是选D
' E# P$ q- u; \9 G7 k& e2 I0 ` B Question 2
$ Z" D/ G. a4 D" J+ jWhich path does traffic take from R1 to R5?
2 Y% A' w- \4 [1 _* b0 UA. The traffic goes through R2.4 V, d/ ^) \9 y# s) T2 t, p# }
B. The traffic goes through R3./ Z1 r) C6 _% p$ ]4 C$ E
C. The traffic is equally load-balanced over R2 and R3.
% \/ \+ y, E% z7 I9 qD. The traffic is unequally load-balanced over R2 and R3.
5 S! P1 K" S* I, T题库中，在R1上show ip route，结果是R2
% ]* M$ K1 K! l T/ _" D- D在考试中查看到R2，R3这两条的路径都是等值的，所以选C" c" O" Y* g: ^) y: X% `! J
9 N8 B$ Q4 M9 v# T0 n; XQuestion 3 + m# O9 y0 b4 e7 C) r; J5 t
Router R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this misconfiguration?& I8 ]8 A8 [# b* ^: c
A. The K values mismatch. 2 ~! P! Q- F2 N, O* j3 w+ P8 ]
B. The AS does not match. / q2 w! Q$ v& ]- D* R
C. The network command is missing.+ {" I& g7 \ C2 ], s
D. The passive-interface command is enabled.
2 d1 f+ Q3 a0 v+ B4 ]0 s2 n题库是选C（R6没有宣告网段）4 q8 G3 x# ^; i, f$ S& I
考试所查到的并不是这个原因，而是选项A！"The K values mismatch."
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' P( c$ I, H) q; a9 ]这个题目有点无语，因为我在PT中做测试，一旦更改了metric值，那么在show run的时候是会有显示相关metric的6 c6 H5 v" k, J0 G4 s
更改K值命令：Router(config)#router eigrp 100
( C8 g6 ~( l: R( |) `9 N3 n; URouter(config-router)#metric weights 1 1 1 0 1 1+ x% v4 Z# n' D, {
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sh run 结果：5 H# r8 f' `. j4 |
router eigrp 1002 q4 k* q6 w' U9 `/ N; E; ^
metric weights 0 1 1 0 1 17 s( n- d/ m4 p) n+ A$ r
% {4 R# q. ?7 w5 N$ F Y0 o) W f但是在考试的时候，show run并没有显示mertric值，只能通过show ip protocols 来查看K值,所以这个命令大家一定要记住用) _( @% @: W }2 e$ o0 `
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- i3 O: x4 ]4 c" Y( K! FQuestion 4- R1#ping 10.5.5.55 source 10.1.1.1
- Type escape sequence to abort.
- Sending 5, 100-byte ICMP Echos to 10.5.5.55, timeout is 2 seconds:
- Packet sent with a source address of 10.1.1.1
- . . . . .
- Success rate is 0 percent (0/5)! g5 j) i+ G; j" a+ Y+ R# {
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B0 h. w5 W3 B1 F! v1 @, nR1为什么ping不通R5？
8 @( x7 g2 q8 J6 sA. The network statement is missing on R5. ! L' D: F* }+ J8 n3 G$ h
B. The loopback interface is shut down on R5.
1 g O7 i6 I# T: e. k0 W; sC. The network statement is missing on R1.
' @+ k. J3 R" w" V7 AD. The IP address that is configured on the Lo1 interface on R5 is# y }3 ?( h' T, F
D. The IP address that is configured on the Lo1 interface on R5 is incorrect.1 j: i" l9 r, Z3 R7 R
题库答案是C，（R1没有将10.1.1.1宣告）2 V% {- w4 A8 q; @
考试的答案是R5没有10.5.5.55宣告进EIGRP，选A
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