本帖最后由 宅男女神 于 2015-11-14 21:33 编辑 6 c6 e! e8 K! w+ p9 R, [5 f6 O- m
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EIGRP Troubleshooting
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- P% ]1 v6 p8 J5 D; ^* c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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Question 1 % J! |/ z* U( p; ^) G9 C& ]' z* E# m
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?
0 r1 C3 j9 p, b8 ^# fA. The interfaces are shutdown, so they are not being advertised. ; C+ v2 ^# R4 m
B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5. ! P4 o p9 A7 `, A4 s2 q
C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.3 p5 K9 r5 l& b5 x
D. The loopback addresses haven’t been advertised, and the network command is missing on R4.. b$ j: {) J9 f- e
题库里给的答案是B (AS号不同)$ p8 G- F8 S u$ 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D5 _, F1 r7 {( p; g2 F
Question 2
$ t) l' ?% \! {2 e3 _7 sWhich path does traffic take from R1 to R5?
8 Z' }9 G9 I3 o \4 F5 y: OA. The traffic goes through R2.9 W/ J4 e, d% D5 I" X; \
B. The traffic goes through R3.
9 a- \. K0 X$ ^! g$ nC. The traffic is equally load-balanced over R2 and R3.
5 P8 n z* _# ^$ u+ W$ mD. The traffic is unequally load-balanced over R2 and R3.+ x% _# d F& Z& Z& |1 }
题库中,在R1上show ip route,结果是R2
' j8 u" P7 ?3 q, {1 r在考试中查看到R2,R3这两条的路径都是等值的,所以选C3 j* U1 T2 M) b" K) L
, h) `8 B3 Z t) y) cQuestion 3 + H+ g" @ R9 @1 V, {5 B. o
Router R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this misconfiguration?( d7 W6 v+ f/ M. U( N- s
A. The K values mismatch.
) T+ G/ C* n6 i; P r( u5 Y3 zB. The AS does not match. ) b) f0 _' {! G. n7 p- _: N" q2 b
C. The network command is missing.
; E3 E$ v: ?. iD. The passive-interface command is enabled.7 }0 i, @' U: J3 D- |$ T: }5 V% @
题库是选C(R6没有宣告网段)
) |' T8 i$ @, D$ e7 C" P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
7 o% s3 W8 q S- }9 h更改K值命令:Router(config)#router eigrp 100
! v/ a# q3 }- R3 J3 j* j$ ?Router(config-router)#metric weights 1 1 1 0 1 1" j T" s" b* b0 n
& i, |& W4 P0 _4 }6 J" Bsh run 结果:- _3 k# X& W9 \+ P4 ~% O4 s
router eigrp 1004 _8 w9 g' w4 k" `/ `9 L x
metric weights 0 1 1 0 1 1
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" w4 @1 b; R% ?( ?% T( B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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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)
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! a0 s9 A% B/ d& b0 }* ]* I9 eR1为什么ping不通R5?9 C' R! R. L1 \
A. The network statement is missing on R5. 3 A E3 D8 Y, x' E0 l. P' {9 S" G
B. The loopback interface is shut down on R5.
' J# {5 l7 }+ A" \/ ^; RC. The network statement is missing on R1. ( z5 j% n! l- ?" `) s
D. The IP address that is configured on the Lo1 interface on R5 is @/ I9 t+ R( _" r- O V
D. The IP address that is configured on the Lo1 interface on R5 is incorrect./ K1 c3 v/ l: c: n i% G k1 p
题库答案是C,(R1没有将10.1.1.1宣告)8 v3 a& o/ {2 r
考试的答案是R5没有10.5.5.55宣告进EIGRP,选A
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