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先察看默认的delay和eigrp top 表
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sh int f0/0
0 q$ B. o0 T3 U" IP1R4#sh int f0/0
7 U- t# |$ \$ k5 m8 oFastEthernet0/0 is up, line protocol is up1 Z8 u; T+ \$ n9 `) m4 L
Hardware is AmdFE, address is cc03.0c7c.0000 (bia cc03.0c7c.0000)
; s; }- a$ u, f8 U% r8 PInternet address is 192.168.4.1/24
! X! j" y. d2 Y# h2 x- {MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec 6 }9 k: |6 \! j
: w* s9 Y: Y, f0 J9 s下面更改
! M. w/ a1 @( y* t1 ]4 _! Z4 Dint f0/0
& X+ p; D# o9 R$ d% Kdelay 1000 4 s) o z* m2 A
[P1R2|P2R1|P2R2]设置装备摆设都是这样，不再阐述 & q8 d; j$ T' h/ S8 g; j
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) R9 X+ T: J% u[BBR1]% h; {+ {* S8 F" K/ v/ T9 S
int s1/0! m+ g6 E8 c0 q; S
no ip add% i: s$ f" h& ~2 Z3 y1 H
no shut
9 j; i5 h) |( c0 t eint s1/0.1 http://CiscoTec.CN CiscoTec.cn
: X. o9 p$ \% R) E5 Y3 ][Copy to clipboard]$ z* m+ l+ n! a7 _
- Z& M/ B6 ~( W* [) ~! M% ~* h* FCODE:
8 _2 L4 U* o. L t, y) s: F察看sh ip route 7 p' X2 p' ^0 w8 {# K; Z
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D 200.200.200.0/24 [90/2300416] via 192.168.3.1, 00:00:01, Serial1/00 ?2 Q& v: ?/ b
D 172.17.0.0/16 [90/2942976] via 192.168.4.2, 00:00:01, FastEthernet0/02 J% n; J" y5 y' `* [- e/ f
D 172.16.0.0/16 [90/3452416] via 192.168.4.2, 00:00:01, FastEthernet0/0
# w, b% \; G0 f$ \3 P8 g+ HD 172.19.0.0/16 [90/2942976] via 192.168.4.2, 00:00:01, FastEthernet0/0
, W& Q6 Y+ K: ]/ jD 172.18.0.0/16 [90/3454976] via 192.168.4.2, 00:00:01, FastEthernet0/0
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' Z' n/ k g; Z. ^% |! P8 z达到200.200.200.0的最佳路径已经变为1条，f0/0已经被去除 1 L/ w6 k3 i( o3 {' W) K! K
那么我们察看一下top表中达到该网段的所有可行路径
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[Copy to clipboard]
& {& x1 O. N$ B1 O5 ECODE:
& b9 D i# w" c1 g% YP1R4#sh ip eigrp top 200.200.200.0
7 t. I' b: A8 [1 HIP-EIGRP (AS 100): Topology entry for 200.200.200.0/24
, ^3 k e4 e/ f/ k' ^( u Y$ [& VState is Passive, Query origin flag is 1, 2 Successor(s), FD is 2300416
9 W0 |6 _+ x. j% k8 E0 rRouting Descriptor Blocks:
0 v. ~; d' l* _192.168.3.1 (Serial1/0), from 192.168.3.1, Send flag is 0x09 n% J5 p- c; u) I7 q Q
Composite metric is (2300416/156160), Route is Internal
( S4 h) g. Y9 O1 OVector metric:
* x# _/ G- r! T& H4 u" p- w* O5 ]Minimum bandwidth is 1544 Kbit
, O: K/ v" @" s6 d3 P, uTotal delay is 25100 microseconds6 t2 D, Q1 R! A4 b! ^: z( I
Reliability is 255/255- k7 v, a5 H! s
Load is 1/255
( r+ S* d) k( L$ R2 L5 c% qMinimum MTU is 1500, ^0 ]8 C6 }# V' o+ p% o8 K
Hop count is 2. r$ G2 b6 A3 o2 h
192.168.4.2 (FastEthernet0/0), from 192.168.4.2, Send flag is 0x0( K& J4 u% _- @) \
Composite metric is (2553856/2297856), Route is Internal/ X' l u0 D# A& u6 E! E5 e
Vector metric:
* X) S+ m; C) i4 SMinimum bandwidth is 1544 Kbit: ?$ k7 Y' X5 B: Q8 n* \
Total delay is 35000 microseconds+ U# A( e) `1 A4 ^& y i
Reliability is 255/255
* c/ b+ M* V9 I0 a6 n& d1 |! \* kLoad is 1/255
$ ^# G, J2 A6 pMinimum MTU is 1500
% _, t) k B" u. o: ~Hop count is 2
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# Q8 |1 N9 z+ g& A! f" _/ ?$ k; U' s可以看到 7 K. d3 r% l1 y( m5 h6 o
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[Copy to clipboard]* }% [: M" U3 L9 ~. Y9 I
CODE:' n s) M3 X& F2 Q; U6 ?
192.168.3.1 (Serial1/0), from 192.168.3.1, Send flag is 0x0
1 W) G% b, p3 \2 p8 a0 GComposite metric is (2300416/156160), Route is Internal% k b, n) A% J5 b+ ~ o0 K; Q' \
192.168.4.2 (FastEthernet0/0), from 192.168.4.2, Send flag is 0x0: O& X! S0 j" Z& v
Composite metric is (2553856/2297856), Route is Internal
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$ r; S7 Q* Q( X7 R2 O4 U因为我们更改了delay值，导致f0/0的metric由原本的2300416/156160变为2553856/2297856)，导致f0/0从最优路径中被删除
6 {& P/ l- x/ X3 ? s那么2300416和2553856之间的分歧只有不到2倍，这里我们使用variance来更改
$ u7 r$ N D2 S. Jrouter eigrp 100
8 g K7 j! }/ h: [var 2$ z; l0 |% B! p. H. M( G8 j; A6 q2 [
然后，再次察看ip route# ^2 F4 s6 U, d5 g
验证结不美观 4 J" e/ f0 C2 Q# t f
[Copy to clipboard]
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P1R4#sh ip route
3 ~ R2 P! j# T- H6 j. `% S9 cD 200.200.200.0/24 [90/2300416] via 192.168.3.1, 00:00:22, Serial1/02 @" }1 x/ _9 A
[90/2553856] via 192.168.4.2, 00:00:22, FastEthernet0/0
: @0 M1 n) ]; Z& s* f- V. zvariance 2
. B: n, }" j/ |) s M最佳路径怀抱乘以这个值后获得一个数，若次优路径怀抱值小于这个数，就会被和最佳路径一路装入路由表。
% s2 E ~" O( H! L3 r$ u================================================================
' \! q( D) V J9 n8 D* W- R下面我们在P1规模内进行EIGRP验证尝试[P1R3-P1R4]8 G; ~2 h: T6 X8 Y0 U& X* O$ V
[P1R3&P1R4通用部门] : L" ~! h, i. Q$ g7 ]8 w! h G# u) c
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key chain cisco
& [+ Z3 J( w. I9 c# S0 Fkey 1' b( d- r; n: T4 X6 F
key-string mypass, c+ I% B" q J
int s1/05 t& f: B. J7 a! I3 W5 F
ip auth key eigrp 100 cisco; i7 E1 U, n. O% O8 I& p
ip auth mod eigrp 100 md5- C: S3 v: L2 K5 P
注重和RIP区分
8 h$ @+ ^5 ]8 ?, |) i( jip rip auth key xxx9 s9 y# v: m3 {6 ?7 N8 m
ip rip auth key md5 5 F$ B9 S2 I1 O
8 a+ H' J' j0 i3 O2 U, ~ E$ m1 j下面我们在P1R4受骗方面应用key-chain到s1/0
! F) Y, D$ \+ b; i( [$ f在应用之前我们不雅察看今朝邻人情况 + z8 Q) c! }# V& i; U
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P1R4#sh ip eigrp nei
) M0 x7 Y& B# r% ZIP-EIGRP neighbors for process 100* w9 `) d g3 j5 X, a6 z3 z8 s
H Address Interface Hold Uptime SRTT RTO Q Seq Type1 v3 C0 ?) x4 `- X# y$ t
(sec) (ms) Cnt Num5 H( B6 e' `8 O( \: h" d+ @
1 192.168.3.1 Se1/0 13 00:00:01 1 2000 1 0
$ ?* d3 L* k! Z( g. [0 192.168.4.2 Fa0/0 11 00:32:20 25 200 0 166
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8 g' Y K5 \2 X1 a可以看到对方
9 A0 @/ f2 H/ l6 ^( n3 m; R* `然后在s1/0上应用key chain，再次不雅察看 $ g, ^- y, H A; t/ }1 P! u
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P1R4#sh ip eigrp nei
/ @- z2 V& _) z/ u& d8 [8 t5 ]IP-EIGRP neighbors for process 100; C- X+ S% u, K; n5 i
H Address Interface Hold Uptime SRTT RTO Q Seq Type B; L3 r* C# q$ m; a
(sec) (ms) Cnt Num# B* g6 X7 h/ W& a" |7 s9 z
0 192.168.4.2 Fa0/0 11 00:34:12 25 200 0 1661 h/ b0 d9 w" j i, T) d
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已经消逝踪了 |
发表于 2012-8-3 10:16:48
楼主