本帖最后由 宅男女神 于 2015-11-14 21:33 编辑 l) Y) A4 J# |+ Z( A, G. p
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EIGRP Troubleshooting
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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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3 q2 L! ]8 ?2 X5 EQuestion 1 5 D- W( a$ A8 W' [2 [
The 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?* N+ E( e+ q; |; @( K
A. The interfaces are shutdown, so they are not being advertised. + t; ?3 E) S4 G5 I8 h# m+ X8 b
B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5. 1 D6 ?* j1 [$ `1 m
C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.* _3 k Y! s# \' ^8 D1 Z$ {' G
D. The loopback addresses haven’t been advertised, and the network command is missing on R4.
' |' v: b; h5 w0 o6 w2 ~/ l- Z/ ~题库里给的答案是B (AS号不同)
F; X0 K: |& S0 ?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
7 ]- j4 B" q, N, P2 H. w1 m) f8 S( ` Question 2
/ [2 Y0 @: v6 @. mWhich path does traffic take from R1 to R5? 0 d Z# g, D4 ] d1 C
A. The traffic goes through R2.1 E, y+ C8 `! d- f5 Z
B. The traffic goes through R3.1 w7 y- O1 p! L6 G" W H
C. The traffic is equally load-balanced over R2 and R3.
4 [6 N8 F. i6 v$ X( |D. The traffic is unequally load-balanced over R2 and R3.
; U, O7 T1 c. b0 y9 f, O题库中,在R1上show ip route,结果是R21 a4 @, b- |* `' V# d- U
在考试中查看到R2,R3这两条的路径都是等值的,所以选C
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Question 3
3 J* i+ C+ n3 ERouter R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this misconfiguration?( v6 j* v8 z- g; G! C0 f: N
A. The K values mismatch.
~9 e# p' E- ~* t9 E7 WB. The AS does not match.
* h" c# h* h; R8 u4 oC. The network command is missing.% d, }/ q2 T! s& T6 g
D. The passive-interface command is enabled./ I5 s% W2 m- @
题库是选C(R6没有宣告网段)
+ w# s8 i. w5 h7 ?- ?( s% [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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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
) |# I1 y, H4 [2 N更改K值命令:Router(config)#router eigrp 100
& M2 C0 P, o* \6 q. _Router(config-router)#metric weights 1 1 1 0 1 1
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sh run 结果:
5 K+ x4 u8 ~- a+ Nrouter eigrp 1000 z: o6 |& `3 L1 g2 V# `
metric weights 0 1 1 0 1 1
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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& {- Z# B' s/ j3 W5 L
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. M, j# F* B6 y1 Q5 ?' W& ?Question 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)! ]6 _8 }* Z" f/ Q; C% x
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' |) M, B- Q- F/ X! R* ]R1为什么ping不通R5?1 g8 F/ ^# j% k( l0 ~% n: l4 a6 y
A. The network statement is missing on R5. 9 z7 u2 O3 C6 a: ]+ Y
B. The loopback interface is shut down on R5.
' G U9 t. G& oC. The network statement is missing on R1.
+ U# k9 F* n* q) E" R; S7 g, }: z/ JD. The IP address that is configured on the Lo1 interface on R5 is( W+ M4 N# N! H/ K9 y. n8 c' ^' r. \
D. The IP address that is configured on the Lo1 interface on R5 is incorrect.
0 Q& P* ~$ b8 c& X, }( T8 q题库答案是C,(R1没有将10.1.1.1宣告)8 o; N% B& O, u' T
考试的答案是R5没有10.5.5.55宣告进EIGRP,选A
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