本帖最后由 宅男女神 于 2015-11-14 21:33 编辑
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EIGRP Troubleshooting
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% u. p( D" A; H 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。& N0 [; u3 T& i, V9 C: k6 k. E
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Question 1
& ]' E5 l% C, Y' Q& p5 l) ]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, j/ J) E/ ]; V) g3 XA. The interfaces are shutdown, so they are not being advertised. / x1 x {! k0 T
B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.
\& L. b6 }6 Q7 ]C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
- N2 U6 m, T4 pD. The loopback addresses haven’t been advertised, and the network command is missing on R4.* h: z9 Z9 ~: |& b: m& N
题库里给的答案是B (AS号不同)
( b6 v \9 a; R& @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
" h Y; s. M: v/ G Question 2, B' p1 f0 F8 w5 g, g- l- }
Which path does traffic take from R1 to R5?
8 D9 C) x" ?+ q# K& M. BA. The traffic goes through R2.
" q' M* ]2 G7 F1 A) J5 rB. The traffic goes through R3.
6 G8 }7 q1 O2 E' @C. The traffic is equally load-balanced over R2 and R3.2 m0 \# F/ q' o& i0 p$ ]! | v1 u
D. The traffic is unequally load-balanced over R2 and R3.
4 X2 d f2 H) @7 k: W3 f% }/ d题库中,在R1上show ip route,结果是R2
# D5 w7 S! c9 d8 {& K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
! y: G9 \. h7 O& IRouter R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this misconfiguration?
0 x& @' H( F, A* A b0 Q% UA. The K values mismatch.
. O- c3 Q& L; U2 }' V* j0 ^B. The AS does not match.
# J1 C/ \4 H& G$ M% lC. The network command is missing.' [* s) y% O B4 q+ w
D. The passive-interface command is enabled.& |0 u% [# ~; I% ~
题库是选C(R6没有宣告网段)
^1 o& @, J* q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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3 x9 Y8 n- j0 g# ~# Q) A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
$ E0 ?6 Z5 {2 ?+ d* l: F1 H L更改K值命令:Router(config)#router eigrp 100, A% B1 x [/ L/ N" s' I
Router(config-router)#metric weights 1 1 1 0 1 1
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sh run 结果:
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metric weights 0 1 1 0 1 1- E L/ p- V$ g H7 ?( o; S& X( a
" ?* }) a" a i: Z# x$ q4 q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
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6 A( m0 x2 d+ A5 W8 tQuestion 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)) o- B: b$ \$ B! F+ A) p) y
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R1为什么ping不通R5?
, }# j! Y) z) D* EA. The network statement is missing on R5. 7 {. g p! y" e' n
B. The loopback interface is shut down on R5.% L7 n; m# _4 u( D% W( I$ i
C. The network statement is missing on R1. / \, N! J R# R; ]$ S9 O& q$ X4 q
D. The IP address that is configured on the Lo1 interface on R5 is
5 j4 n: V. S+ y8 Q3 N0 v) F' lD. The IP address that is configured on the Lo1 interface on R5 is incorrect.
6 }/ ?# v! R2 g9 W# m3 I题库答案是C,(R1没有将10.1.1.1宣告)6 Q0 w' N( n+ q
考试的答案是R5没有10.5.5.55宣告进EIGRP,选A" Q. s [% j" e- Y2 ]
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